diff --git a/Cargo.toml b/Cargo.toml index dd828d1f..f61fb4a2 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -4,6 +4,7 @@ members = [ "cli", "client", "core", + "core2", "repl", "rpi", "sdl", @@ -22,8 +23,9 @@ default-members = [ [workspace.lints.rust] anonymous_parameters = "warn" bad_style = "warn" -missing_docs = "warn" -unused = "warn" +missing_docs = "allow" +unexpected_cfgs = "allow" +unused = "allow" unused_extern_crates = "warn" unused_import_braces = "warn" unused_qualifications = "warn" diff --git a/cli/Cargo.toml b/cli/Cargo.toml index c3c5b3a8..272073b0 100644 --- a/cli/Cargo.toml +++ b/cli/Cargo.toml @@ -31,9 +31,9 @@ thiserror = "1.0" version = "0.11.99" # ENDBASIC-VERSION path = "../client" -[dependencies.endbasic-core] +[dependencies.endbasic-core2] version = "0.11.99" # ENDBASIC-VERSION -path = "../core" +path = "../core2" [dependencies.endbasic-repl] version = "0.11.99" # ENDBASIC-VERSION diff --git a/cli/src/main.rs b/cli/src/main.rs index 09b4ff78..8cccf59a 100644 --- a/cli/src/main.rs +++ b/cli/src/main.rs @@ -17,12 +17,23 @@ use anyhow::{Result, anyhow}; use async_channel::Sender; -use endbasic_core::exec::Signal; -use endbasic_std::console::{Console, ConsoleSpec}; -use endbasic_std::gpio; -use endbasic_std::storage::Storage; +#[cfg(not(feature = "crossterm"))] +use async_channel::Sender; +use endbasic_client::CloudService; +use endbasic_core2::{Compiler, StopReason, Vm}; +use endbasic_repl::demos::DemoDriveFactory; +#[cfg(not(feature = "crossterm"))] +use endbasic_std::Signal; +use endbasic_std::console::Console; +#[cfg(feature = "rpi")] +use endbasic_std::console::ConsoleSpec; +#[cfg(not(feature = "sdl"))] +use endbasic_std::console::ConsoleSpec; +use endbasic_std::storage::{DirectoryDriveFactory, Storage}; +use endbasic_std::{InteractiveMachineBuilder, Machine, MachineBuilder, Signal, gpio}; use getoptsargs::prelude::*; use std::cell::RefCell; +use std::collections::HashMap; use std::fs::File; use std::io; use std::path::Path; @@ -100,20 +111,20 @@ fn setup_gpio_pins(spec: Option<&str>) -> Result>> { fn new_machine_builder( console_spec: Option<&str>, gpio_pins_spec: Option<&str>, -) -> Result { +) -> Result { let signals_chan = async_channel::unbounded(); - let mut builder = endbasic_std::MachineBuilder::default(); + let mut builder = MachineBuilder::default(); builder = builder.with_console(setup_console(console_spec, signals_chan.0.clone())?); + /* builder = builder.with_signals_chan(signals_chan); builder = builder.with_gpio_pins(setup_gpio_pins(gpio_pins_spec)?); + */ Ok(builder) } /// Turns a regular machine builder into an interactive builder ensuring common features for all /// callers. -fn make_interactive( - builder: endbasic_std::MachineBuilder, -) -> endbasic_std::InteractiveMachineBuilder { +fn make_interactive(builder: MachineBuilder) -> InteractiveMachineBuilder { builder .make_interactive() .with_program(Rc::from(RefCell::from(endbasic_repl::editor::Editor::default()))) @@ -124,16 +135,16 @@ fn make_interactive( /// /// `service_url` is the base URL of the cloud service. fn finish_interactive_build( - mut builder: endbasic_std::InteractiveMachineBuilder, + mut builder: InteractiveMachineBuilder, service_url: &str, -) -> Result { +) -> Result { let console = builder.get_console(); let storage = builder.get_storage(); - let mut machine = builder.build()?; + let mut machine = builder.build(); - let service = Rc::from(RefCell::from(endbasic_client::CloudService::new(service_url)?)); - endbasic_client::add_all(&mut machine, service, console, storage, "https://repl.endbasic.dev/"); + let service = Rc::from(RefCell::from(CloudService::new(service_url)?)); + //endbasic_client::add_all(&mut machine, service, console, storage, "https://repl.endbasic.dev/"); Ok(machine) } @@ -244,12 +255,9 @@ fn setup_console( /// This instantiates non-optional drives, such as `MEMORY:` and `DEMOS:`, maps `LOCAL` the /// location given in `local_drive_spec`. pub fn setup_storage(storage: &mut Storage, local_drive_spec: &str) -> io::Result<()> { - storage.register_scheme("demos", Box::from(endbasic_repl::demos::DemoDriveFactory::default())); + storage.register_scheme("demos", Box::from(DemoDriveFactory::default())); storage.mount("demos", "demos://").expect("Demos drive shouldn't fail to mount"); - storage.register_scheme( - "file", - Box::from(endbasic_std::storage::DirectoryDriveFactory::default()), - ); + storage.register_scheme("file", Box::from(DirectoryDriveFactory::default())); storage.mount("local", local_drive_spec)?; storage.cd("local:").expect("Local drive was just registered"); Ok(()) @@ -286,9 +294,12 @@ async fn run_script>( gpio_pins_spec: Option<&str>, ) -> Result { let builder = new_machine_builder(console_spec, gpio_pins_spec)?; - let mut machine = builder.build()?; + let mut machine = builder.build(); let mut input = File::open(path)?; - Ok(machine.exec(&mut input).await?.as_exit_code()) + + machine.compile(&mut input)?; + machine.exec().await?; + Ok(0) } /// Executes the `path` program in a fresh machine allowing any interactive-only calls. @@ -331,7 +342,8 @@ async fn run_interactive( } None => { let mut input = File::open(path)?; - Ok(machine.exec(&mut input).await?.as_exit_code()) + machine.compile(&mut input)?; + Ok(machine.exec().await?.unwrap_or(0)) } } } diff --git a/client/Cargo.toml b/client/Cargo.toml index 77f32c42..3d6637b3 100644 --- a/client/Cargo.toml +++ b/client/Cargo.toml @@ -23,9 +23,9 @@ serde_json = "1.0" time = { version = "0.3", features = ["std"] } url = "2.2" -[dependencies.endbasic-core] +[dependencies.endbasic-core2] version = "0.11.99" # ENDBASIC-VERSION -path = "../core" +path = "../core2" [dependencies.endbasic-std] version = "0.11.99" # ENDBASIC-VERSION diff --git a/client/src/lib.rs b/client/src/lib.rs index d956e5a4..99467416 100644 --- a/client/src/lib.rs +++ b/client/src/lib.rs @@ -22,8 +22,8 @@ use std::io; mod cloud; pub use cloud::CloudService; -mod cmds; -pub use cmds::add_all; +//mod cmds; +//pub use cmds::add_all; mod drive; pub(crate) use drive::CloudDriveFactory; #[cfg(test)] diff --git a/core2/Cargo.toml b/core2/Cargo.toml new file mode 100644 index 00000000..19192eb6 --- /dev/null +++ b/core2/Cargo.toml @@ -0,0 +1,30 @@ +[package] +name = "endbasic-core2" +version = "0.11.99" # ENDBASIC-VERSION +license = "Apache-2.0" +authors = ["Julio Merino "] +categories = ["development-tools", "parser-implementations"] +keywords = ["basic", "interpreter", "learning", "programming"] +description = "The EndBASIC programming language - core" +homepage = "https://www.endbasic.dev/" +repository = "https://github.com/endbasic/endbasic" +readme = "README.md" +edition = "2024" +publish = false + +[lints] +workspace = true + +[dependencies] +async-trait = "0.1" +thiserror = "1.0" + +[dev-dependencies] +futures-lite = "2.2" +tempfile = "3" +tokio = { version = "1", features = ["full"] } + +[[example]] +name = "core2-config" +path = "examples/config.rs" +harness = false diff --git a/core2/LICENSE b/core2/LICENSE new file mode 100644 index 00000000..d6456956 --- /dev/null +++ b/core2/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/core2/NOTICE b/core2/NOTICE new file mode 100644 index 00000000..a6ebc462 --- /dev/null +++ b/core2/NOTICE @@ -0,0 +1,2 @@ +EndBASIC +Copyright 2020-2026 Julio Merino diff --git a/core2/README.md b/core2/README.md new file mode 100644 index 00000000..5d371610 --- /dev/null +++ b/core2/README.md @@ -0,0 +1,86 @@ +# The EndBASIC programming language - core + +[![Crates.io](https://img.shields.io/crates/v/endbasic-core.svg)](https://crates.io/crates/endbasic-core/) +[![Docs.rs](https://docs.rs/endbasic-core/badge.svg)](https://docs.rs/endbasic-core/) + +EndBASIC is an interpreter for a BASIC-like language and is inspired by +Amstrad's Locomotive BASIC 1.1 and Microsoft's QuickBASIC 4.5. Like the former, +EndBASIC intends to provide an interactive environment that seamlessly merges +coding with immediate visual feedback. Like the latter, EndBASIC offers +higher-level programming constructs and strong typing. + +EndBASIC offers a simplified and restricted environment to learn the foundations +of programming and focuses on features that can quickly reward the programmer. +These features include things like a built-in text editor, commands to +render graphics, and commands to interact with the hardware of a Raspberry +Pi. Implementing this kind of features has priority over others such as +performance or a much richer language. + +EndBASIC is written in Rust and runs both on the web and locally on a variety of +operating systems and platforms, including macOS, Windows, and Linux. + +EndBASIC is free software under the [Apache 2.0 License](LICENSE). + +## What's in this crate? + +`endbasic-core` provides the language parser and interpreter. By design, this +crate provides zero commands and zero functions. + +## Language features + +EndBASIC's language features are inspired by other BASIC interpreters but the +language does not intend to be fully compatible with them. The language +currently supports: + +* Variable types: boolean (`?`), double (`#`), integer (`%`), and string + (`$`). +* Arrays via `DIM name(1, 2, 3) AS type`. +* Strong typing with optional variable type annotations. +* `DATA` statements for literal primitive values. Booleans, numbers, and + strings are supported, but strings must be double-quoted. +* `DECLARE FUNCTION` / `DECLARE SUB`. +* `DO` / `LOOP` statements with optional `UNTIL` / `WHILE` pre- and + post-guards and optional `EXIT DO` early terminations. +* `DIM SHARED` for global variables. +* `FUNCTION name` / `EXIT FUNCTION` / `END FUNCTION`. +* `IF ... THEN ... [ELSE ...]` uniline statements. +* `IF ... THEN` / `ELSEIF ... THEN` / `ELSE` / `END IF` multiline + statements. +* `FOR x = ... TO ... [STEP ...]` / `NEXT` loops with optional `EXIT FOR` + early terminations. +* `GOSUB line` / `GOSUB @label` / `RETURN` for procedure execution. +* `GOTO line` / `GOTO @label` statements and `@label` annotations. +* `SELECT CASE` / `CASE ...` / `CASE IS ...` / `CASE ... TO ...` / + `END SELECT` statements. +* `SUB name` / `EXIT SUB` / `END SUB`. +* `WHILE ...` / `WEND` loops. +* Error handling via `ON ERROR GOTO` and `ON ERROR RESUME NEXT`. +* UTF-8 everywhere (I think). + +## Design principles + +Some highlights about the EndBASIC implementation are: + +* Minimalist core. The interpreter knows how to execute the logic of the + language but, by default, it exposes no builtins to the scripts—not even + `INPUT` or `PRINT`. This makes EndBASIC ideal for embedding into other + programs, as it is possible to execute external code without side-effects or + by precisely controlling how such code interacts with the host program. + +* Async support. The interpreter is async-compatible, making it trivial to + embed it into Javascript via WASM. + +## Examples + +The `examples` directory contains sample code to show how to embed the EndBASIC +interpreter into your own programs. In particular: + +* [`examples/config.rs`](examples/config.rs): Shows how to instantiate a + minimal EndBASIC interpreter and uses it to implement what could be a + configuration file parser. + +* [`examples/dsl.rs`](example/dsl.rs): Shows how to instantiate an EndBASIC + interpreter with custom functions and commands to construct what could be a + domain-specific language. This language is then used to control some + hypothetical hardware lights and exemplifies how to bridge the Rust world + and the EndBASIC world. diff --git a/core2/examples/config.rs b/core2/examples/config.rs new file mode 100644 index 00000000..5da5aa8d --- /dev/null +++ b/core2/examples/config.rs @@ -0,0 +1,163 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Configuration file parser using an EndBASIC interpreter. +//! +//! This example sets up a minimal EndBASIC interpreter and uses it to parse what could be a +//! configuration file. Because the interpreter is configured without any commands or functions, +//! the scripted code cannot call back into Rust land, so the script's execution is guaranteed to +//! not have side-effects. + +use endbasic_core2::{Compiler, ConstantDatum, ExprType, GlobalDef, GlobalDefKind, StopReason, Vm}; +use std::collections::HashMap; + +/// Sample configuration file to parse. +const SCRIPT: &str = r#" +foo_value% = 123 +result_total% = foo_value% + 456 +status$ = "Processing complete" +results%(0) = 10 +results%(1) = 20 +results%(2) = 30 + +DIM SHARED defined_within +defined_within = 42 + +injected_value% = injected_value% + 1 +"#; + +fn main() { + // Describe the global variables the script is expected to read and write. + // Note that "optional_flag" is declared so the script could set it, but the + // script does not assign it. Its value will be the zero default. + // "injected_value" is pre-initialized to a value that we expect the script + // to read and modify. + let global_defs = vec![ + GlobalDef { + name: "foo_value".to_owned(), + kind: GlobalDefKind::Scalar { etype: ExprType::Integer, initial_value: None }, + }, + GlobalDef { + name: "result_total".to_owned(), + kind: GlobalDefKind::Scalar { etype: ExprType::Integer, initial_value: None }, + }, + GlobalDef { + name: "status".to_owned(), + kind: GlobalDefKind::Scalar { etype: ExprType::Text, initial_value: None }, + }, + GlobalDef { + name: "results".to_owned(), + kind: GlobalDefKind::Array { subtype: ExprType::Integer, dimensions: vec![3] }, + }, + GlobalDef { + name: "optional_flag".to_owned(), + kind: GlobalDefKind::Scalar { etype: ExprType::Boolean, initial_value: None }, + }, + GlobalDef { + name: "injected_value".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Integer, + initial_value: Some(ConstantDatum::Integer(5)), + }, + }, + ]; + + // Compile the script, making the pre-defined globals visible to it. + let upcalls = HashMap::default(); + let compiler = Compiler::new(&upcalls, &global_defs).expect("Globals initialization failed"); + let image = compiler.compile(&mut SCRIPT.as_bytes()).expect("Compilation failed"); + + // Execute the compiled image. + let mut vm = Vm::new(upcalls); + match vm.exec(&image) { + StopReason::End(code) => { + if !code.is_success() { + eprintln!("Script exited with code {}", code.to_i32()); + } + } + StopReason::Eof => (), + StopReason::Exception(pos, msg) => { + eprintln!("Script raised an exception at {}: {}", pos, msg); + std::process::exit(1); + } + StopReason::Upcall(_) => { + eprintln!("Unexpected upcall (no upcalls are registered)"); + std::process::exit(1); + } + } + + // Query the global variables by key. + match vm.get_global(&image, &"foo_value".into()) { + Ok(Some(ConstantDatum::Integer(v))) => println!("foo_value% = {}", v), + Ok(Some(other)) => println!("foo_value% has unexpected type: {:?}", other), + Ok(None) => println!("foo_value% is not set"), + Err(e) => println!("foo_value%: error: {}", e), + } + match vm.get_global(&image, &"result_total".into()) { + Ok(Some(ConstantDatum::Integer(v))) => println!("result_total% = {}", v), + Ok(Some(other)) => println!("result_total% has unexpected type: {:?}", other), + Ok(None) => println!("result_total% is not set"), + Err(e) => println!("result_total%: error: {}", e), + } + match vm.get_global(&image, &"status".into()) { + Ok(Some(ConstantDatum::Text(v))) => println!("status$ = {:?}", v), + Ok(Some(other)) => println!("status$ has unexpected type: {:?}", other), + Ok(None) => println!("status$ is not set"), + Err(e) => println!("status$: error: {}", e), + } + // defined_within was not provided upfront but was declared as a global within + // the script. We can query it here too. + match vm.get_global(&image, &"defined_within".into()) { + Ok(Some(ConstantDatum::Integer(v))) => println!("defined_within% = {}", v), + Ok(Some(other)) => println!("result_total% has unexpected type: {:?}", other), + Ok(None) => println!("defined_within% is not set"), + Err(e) => println!("defined_within%: error: {}", e), + } + // optional_flag was declared but the script never assigned it, so it should + // receive its "zero value". + match vm.get_global(&image, &"optional_flag".into()) { + Ok(Some(ConstantDatum::Boolean(v))) => println!("optional_flag? = {}", v), + Ok(Some(other)) => println!("optional_flag? has unexpected type: {:?}", other), + Ok(None) => println!("optional_flag? is not declared"), + Err(e) => println!("optional_flag?: error: {}", e), + } + // injected_value was pre-initialized to 5 before compilation. The script incremented + // it by 1, so we expect 6 here. + match vm.get_global(&image, &"injected_value".into()) { + Ok(Some(ConstantDatum::Integer(v))) => println!("injected_value% = {}", v), + Ok(Some(other)) => println!("injected_value% has unexpected type: {:?}", other), + Ok(None) => println!("injected_value% is not set"), + Err(e) => println!("injected_value%: error: {}", e), + } + // "unknown" was never declared at all, so get_global returns Ok(None). + match vm.get_global(&image, &"unknown".into()) { + Ok(Some(v)) => println!("unknown = {:?}", v), + Ok(None) => println!("unknown is not declared"), + Err(e) => println!("unknown: error: {}", e), + } + for i in 0..3_i32 { + match vm.get_global_array(&image, &"results".into(), &[i]) { + Ok(Some(ConstantDatum::Integer(v))) => println!("results%({}) = {}", i, v), + Ok(Some(other)) => println!("results%({}) has unexpected type: {:?}", i, other), + Ok(None) => println!("results%({}) is not set", i), + Err(e) => println!("results%({}): error: {}", i, e), + } + } + // Demonstrate that querying a scalar as an array yields an error. + match vm.get_global_array(&image, &"foo_value".into(), &[0]) { + Ok(v) => println!("foo_value%(0) = {:?}", v), + Err(e) => println!("foo_value%(0): error: {}", e), + } +} diff --git a/core2/src/ast.rs b/core2/src/ast.rs new file mode 100644 index 00000000..1f9cc6fe --- /dev/null +++ b/core2/src/ast.rs @@ -0,0 +1,835 @@ +// EndBASIC +// Copyright 2020 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Abstract Syntax Tree (AST) for the EndBASIC language. + +use crate::reader::LineCol; +use std::convert::TryFrom; +use std::fmt; + +/// Components of a boolean literal expression. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct BooleanSpan { + /// The boolean literal. + pub value: bool, + + /// Starting position of the literal. + pub pos: LineCol, +} + +/// Components of a double literal expression. +#[derive(Clone, Debug, PartialEq)] +pub struct DoubleSpan { + /// The double literal. + pub value: f64, + + /// Starting position of the literal. + pub pos: LineCol, +} + +/// Components of an integer literal expression. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct IntegerSpan { + /// The integer literal. + pub value: i32, + + /// Starting position of the literal. + pub pos: LineCol, +} + +/// Components of a string literal expression. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct TextSpan { + /// The string literal. + pub value: String, + + /// Starting position of the literal. + pub pos: LineCol, +} + +/// Components of a symbol reference expression. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct SymbolSpan { + /// The symbol reference. + pub vref: VarRef, + + /// Starting position of the symbol reference. + pub pos: LineCol, +} + +/// Components of a unary operation expression. +#[derive(Clone, Debug, PartialEq)] +pub struct UnaryOpSpan { + /// Expression affected by the operator. + pub expr: Expr, + + /// Starting position of the operator. + pub pos: LineCol, +} + +/// Components of a binary operation expression. +#[derive(Clone, Debug, PartialEq)] +pub struct BinaryOpSpan { + /// Expression on the left side of the operator. + pub lhs: Expr, + + /// Expression on the right side of the operator. + pub rhs: Expr, + + /// Starting position of the operator. + pub pos: LineCol, +} + +/// Represents an expression and provides mechanisms to evaluate it. +#[derive(Clone, Debug, PartialEq)] +pub enum Expr { + /// A literal boolean value. + Boolean(BooleanSpan), + /// A literal double-precision floating point value. + Double(DoubleSpan), + /// A literal integer value. + Integer(IntegerSpan), + /// A literal string value. + Text(TextSpan), + + /// A reference to a variable. + Symbol(SymbolSpan), + + /// Arithmetic addition of two expressions. + Add(Box), + /// Arithmetic subtraction of two expressions. + Subtract(Box), + /// Arithmetic multiplication of two expressions. + Multiply(Box), + /// Arithmetic division of two expressions. + Divide(Box), + /// Arithmetic modulo operation of two expressions. + Modulo(Box), + /// Arithmetic power operation of two expressions. + Power(Box), + /// Arithmetic sign flip of an expression. + Negate(Box), + + /// Relational equality comparison of two expressions. + Equal(Box), + /// Relational inequality comparison of two expressions. + NotEqual(Box), + /// Relational less-than comparison of two expressions. + Less(Box), + /// Relational less-than or equal-to comparison of two expressions. + LessEqual(Box), + /// Relational greater-than comparison of two expressions. + Greater(Box), + /// Relational greater-than or equal-to comparison of two expressions. + GreaterEqual(Box), + + /// Logical and of two expressions. + And(Box), + /// Logical not of an expression. + Not(Box), + /// Logical or of two expressions. + Or(Box), + /// Logical xor of two expressions. + Xor(Box), + + /// Shift left of a signed integer by a number of bits without rotation. + ShiftLeft(Box), + /// Shift right of a signed integer by a number of bits without rotation. + ShiftRight(Box), + + /// A function call or an array reference. + Call(CallSpan), +} + +impl Expr { + /// Returns the start position of the expression. + pub fn start_pos(&self) -> LineCol { + let mut expr = self; + loop { + match expr { + Expr::Boolean(span) => return span.pos, + Expr::Double(span) => return span.pos, + Expr::Integer(span) => return span.pos, + Expr::Text(span) => return span.pos, + + Expr::Symbol(span) => return span.pos, + + Expr::Not(span) => return span.pos, + Expr::Negate(span) => return span.pos, + + Expr::Call(span) => return span.vref_pos, + + Expr::Add(span) + | Expr::And(span) + | Expr::Divide(span) + | Expr::Equal(span) + | Expr::Greater(span) + | Expr::GreaterEqual(span) + | Expr::Less(span) + | Expr::LessEqual(span) + | Expr::Modulo(span) + | Expr::Multiply(span) + | Expr::NotEqual(span) + | Expr::Or(span) + | Expr::Power(span) + | Expr::ShiftLeft(span) + | Expr::ShiftRight(span) + | Expr::Subtract(span) + | Expr::Xor(span) => expr = &span.lhs, + } + } + } +} + +/// Represents type of an expression. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +#[repr(u8)] +pub enum ExprType { + /// Type for an expression that evaluates to a boolean. + Boolean = 0, + + /// Type for an expression that evaluates to a double. + Double = 1, + + /// Type for an expression that evaluates to an integer. + Integer = 2, + + /// Type for an expression that evaluates to a string. + Text = 3, +} + +impl TryFrom for ExprType { + type Error = (); + + fn try_from(value: u8) -> Result { + match value { + 0 => Ok(Self::Boolean), + 1 => Ok(Self::Double), + 2 => Ok(Self::Integer), + 3 => Ok(Self::Text), + _ => Err(()), + } + } +} + +impl ExprType { + /// Returns true if this expression type is numerical. + pub(crate) fn is_numerical(self) -> bool { + self == Self::Double || self == Self::Integer + } + + /// Returns the textual representation of the annotation for this type. + pub fn annotation(&self) -> char { + match self { + ExprType::Boolean => '?', + ExprType::Double => '#', + ExprType::Integer => '%', + ExprType::Text => '$', + } + } +} + +impl fmt::Display for ExprType { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + ExprType::Boolean => write!(f, "BOOLEAN"), + ExprType::Double => write!(f, "DOUBLE"), + ExprType::Integer => write!(f, "INTEGER"), + ExprType::Text => write!(f, "STRING"), + } + } +} + +/// Represents a reference to a variable (which doesn't have to exist). +/// +/// Variable references are different from `SymbolKey`s because they maintain the case of the +/// reference (for error display purposes) and because they carry an optional type annotation. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct VarRef { + /// Name of the variable this points to. + pub name: String, + + /// Type of the variable this points to, if explicitly specified. + /// + /// If `None`, the type of the variable is subject to type inference. + pub ref_type: Option, +} + +impl VarRef { + /// Creates a new reference to the variable with `name` and the optional `ref_type` type. + pub fn new>(name: T, ref_type: Option) -> Self { + Self { name: name.into(), ref_type } + } + + /// Returns true if this reference is compatible with the given type. + pub fn accepts(&self, other: ExprType) -> bool { + match self.ref_type { + None => true, + Some(vtype) => vtype == other, + } + } + + /// Returns true if this reference is compatible with the return type of a callable. + pub fn accepts_callable(&self, other: Option) -> bool { + match self.ref_type { + None => true, + Some(vtype) => match other { + Some(other) => vtype == other, + None => false, + }, + } + } +} + +impl fmt::Display for VarRef { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self.ref_type { + None => self.name.fmt(f), + Some(vtype) => write!(f, "{}{}", self.name, vtype.annotation()), + } + } +} + +/// Types of separators between arguments to a `BuiltinCall`. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +#[repr(u8)] +pub enum ArgSep { + /// Filler for the separator in the last argument. + End = 0, + + /// Short separator (`;`). + Short = 1, + + /// Long separator (`,`). + Long = 2, + + /// `AS` separator. + As = 3, +} + +impl TryFrom for ArgSep { + type Error = (); + + fn try_from(value: u8) -> Result { + match value { + 0 => Ok(Self::End), + 1 => Ok(Self::Short), + 2 => Ok(Self::Long), + 3 => Ok(Self::As), + _ => Err(()), + } + } +} + +impl fmt::Display for ArgSep { + // TODO(jmmv): Can this be removed in favor of describe()? + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + match self { + ArgSep::End => write!(f, ""), + ArgSep::Short => write!(f, ";"), + ArgSep::Long => write!(f, ","), + ArgSep::As => write!(f, "AS"), + } + } +} + +impl ArgSep { + /// Formats the separator for a syntax specification. + /// + /// The return value contains the textual representation of the separator and a boolean that + /// indicates whether the separator requires a leading space. + pub(crate) fn describe(&self) -> (&str, bool) { + match self { + ArgSep::End => ("", false), + ArgSep::Short => (";", false), + ArgSep::Long => (",", false), + ArgSep::As => ("AS", true), + } + } +} + +/// Components of an array assignment statement. +#[derive(Debug, PartialEq)] +#[cfg_attr(test, derive(Clone))] +pub struct ArrayAssignmentSpan { + /// Reference to the array to modify. + pub vref: VarRef, + + /// Position of the `vref`. + pub vref_pos: LineCol, + + /// Expressions to compute the subscripts to index the array. + pub subscripts: Vec, + + /// Expression to compute the value of the modified element. + pub expr: Expr, +} + +/// Components of an assignment statement. +#[derive(Debug, PartialEq)] +#[cfg_attr(test, derive(Clone))] +pub struct AssignmentSpan { + /// Reference to the variable to set. + pub vref: VarRef, + + /// Position of the `vref`. + pub vref_pos: LineCol, + + /// Expression to compute the value of the modified variable. + pub expr: Expr, +} + +/// Single argument to a builtin call statement. +#[derive(Clone, Debug, PartialEq)] +pub struct ArgSpan { + /// Expression to compute the argument's value. This expression is optional to support calls + /// of the form `PRINT a, , b` where some arguments are empty. + pub expr: Option, + + /// Separator between this argument and the *next*. The last instance of this type in a call + /// always carries a value of `ArgSep::End`. + pub sep: ArgSep, + + /// Position of the `sep`. + pub sep_pos: LineCol, +} + +/// Components of a call statement or expression. +#[derive(Clone, Debug, PartialEq)] +pub struct CallSpan { + /// Reference to the callable (a command or a function), or the array to index. + pub vref: VarRef, + + /// Position of the reference. + pub vref_pos: LineCol, + + /// Sequence of arguments to pass to the callable. + pub args: Vec, +} + +/// Components of a `FUNCTION` or `SUB` definition. +#[derive(Debug, PartialEq)] +pub struct CallableSpan { + /// Name of the callable, expressed as a variable reference. For functions, this contains + /// a type, and for subroutines, it does not. + pub name: VarRef, + + /// Position of the name of the callable. + pub name_pos: LineCol, + + /// Definition of the callable parameters. + pub params: Vec, + + /// Statements within the callable's body. + pub body: Vec, + + /// Position of the end of the callable, used when injecting the implicit return. + pub end_pos: LineCol, +} + +/// Components of a data statement. +#[derive(Debug, PartialEq)] +pub struct DataSpan { + /// Collection of optional literal values. + pub values: Vec>, +} + +/// Components of a `DECLARE` statement. +#[derive(Debug, PartialEq)] +pub struct DeclareSpan { + /// Name of the callable, expressed as a variable reference. For functions, this contains + /// a type, and for subroutines, it does not. + pub name: VarRef, + + /// Position of the name of the callable. + pub name_pos: LineCol, + + /// Definition of the callable parameters. + pub params: Vec, +} + +/// Components of a variable definition. +/// +/// Given that a definition causes the variable to be initialized to a default value, it is +/// tempting to model this statement as a simple assignment. However, we must be able to +/// detect variable redeclarations at runtime, so we must treat this statement as a separate +/// type from assignments. +#[derive(Debug, Eq, PartialEq)] +#[cfg_attr(test, derive(Clone))] +pub struct DimSpan { + /// Name of the variable to be defined. Type annotations are not allowed, hence why this is + /// not a `VarRef`. + pub name: String, + + /// Position of the name. + pub name_pos: LineCol, + + /// Whether the variable is global or not. + pub shared: bool, + + /// Type of the variable to be defined. + pub vtype: ExprType, + + /// Position of the type. + pub vtype_pos: LineCol, +} + +/// Components of an array definition. +#[derive(Debug, PartialEq)] +#[cfg_attr(test, derive(Clone))] +pub struct DimArraySpan { + /// Name of the array to define. Type annotations are not allowed, hence why this is not a + /// `VarRef`. + pub name: String, + + /// Position of the name. + pub name_pos: LineCol, + + /// Whether the array is global or not. + pub shared: bool, + + /// Expressions to compute the dimensions of the array. + pub dimensions: Vec, + + /// Type of the array to be defined. + pub subtype: ExprType, + + /// Position of the subtype. + pub subtype_pos: LineCol, +} + +/// Type of the `DO` loop. +#[derive(Debug, PartialEq)] +pub enum DoGuard { + /// Represents an infinite loop without guards. + Infinite, + + /// Represents a loop with an `UNTIL` guard in the `DO` clause. + PreUntil(Expr), + + /// Represents a loop with a `WHILE` guard in the `DO` clause. + PreWhile(Expr), + + /// Represents a loop with an `UNTIL` guard in the `LOOP` clause. + PostUntil(Expr), + + /// Represents a loop with a `WHILE` guard in the `LOOP` clause. + PostWhile(Expr), +} + +/// Components of a `DO` statement. +#[derive(Debug, PartialEq)] +pub struct DoSpan { + /// Expression to compute whether to execute the loop's body or not and where this appears in + /// the `DO` statement. + pub guard: DoGuard, + + /// Statements within the loop's body. + pub body: Vec, +} + +/// Components of an `END` statement. +#[derive(Debug, PartialEq)] +pub struct EndSpan { + /// Integer expression to compute the return code. + pub code: Option, + + /// Position of the statement. + pub pos: LineCol, +} + +/// Components of an `EXIT` statement. +#[derive(Debug, Eq, PartialEq)] +pub struct ExitSpan { + /// Position of the statement. + pub pos: LineCol, +} + +/// Components of a branch of an `IF` statement. +#[derive(Debug, PartialEq)] +pub struct IfBranchSpan { + /// Expression that guards execution of this branch. + pub guard: Expr, + + /// Statements within the branch. + pub body: Vec, +} + +/// Components of an `IF` statement. +#[derive(Debug, PartialEq)] +pub struct IfSpan { + /// Sequence of the branches in the conditional. + /// + /// Representation of the conditional branches. The final `ELSE` branch, if present, is also + /// included here and its guard clause is always a true expression. + pub branches: Vec, +} + +/// Components of a `FOR` statement. +/// +/// Note that we do not store the original end and step values, and instead use expressions to +/// represent the loop condition and the computation of the next iterator value. We do this +/// for run-time efficiency. The reason this is possible is because we force the step to be an +/// integer literal at parse time and do not allow it to be an expression. +#[derive(Debug, PartialEq)] +pub struct ForSpan { + /// Iterator name, expressed as a variable reference that must be either automatic or an + /// integer. + pub iter: VarRef, + + /// Position of the iterator. + pub iter_pos: LineCol, + + /// If true, the iterator computation needs to be performed as a double so that, when the + /// iterator variable is not yet defined, it gains the correct type. + pub iter_double: bool, + + /// Expression to compute the iterator's initial value. + pub start: Expr, + + /// Condition to test after each iteration. + pub end: Expr, + + /// Expression to compute the iterator's next value. + pub next: Expr, + + /// Statements within the loop's body. + pub body: Vec, +} + +/// Components of a `GOTO` or a `GOSUB` statement. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct GotoSpan { + /// Name of the label to jump to. + pub target: String, + + /// Position of the label. + pub target_pos: LineCol, +} + +/// Components of a label "statement". +/// +/// In principle, labels should be just a property of a statement but, for simplicity in the +/// current model, it's easiest to represent them as their own statement. +#[derive(Debug, Eq, PartialEq)] +pub struct LabelSpan { + /// Name of the label being defined. + pub name: String, + + /// Position of the label. + pub name_pos: LineCol, +} + +/// Components of an `ON ERROR` statement. +#[derive(Debug, Eq, PartialEq)] +pub enum OnErrorSpan { + /// Components of an `ON ERROR GOTO @label` statement. + Goto(GotoSpan, LineCol), + + /// Components of an `ON ERROR GOTO 0` statement. + Reset(LineCol), + + /// Components of an `ON ERROR RESUME NEXT` statement. + ResumeNext(LineCol), +} + +/// Components of a `RETURN` statement. +#[derive(Debug, Eq, PartialEq)] +pub struct ReturnSpan { + /// Position of the statement. + pub pos: LineCol, +} + +/// Collection of relational operators that can appear in a `CASE IS` guard.. +#[derive(Debug, Eq, PartialEq)] +pub enum CaseRelOp { + /// Relational operator for `CASE IS =`. + Equal, + + /// Relational operator for `CASE IS <>`. + NotEqual, + + /// Relational operator for `CASE IS <`. + Less, + + /// Relational operator for `CASE IS <=`. + LessEqual, + + /// Relational operator for `CASE IS >`. + Greater, + + /// Relational operator for `CASE IS >=`. + GreaterEqual, +} + +/// Components of a `CASE` guard. +#[derive(Debug, PartialEq)] +pub enum CaseGuardSpan { + /// Represents an `IS ` guard or a simpler `` guard. + Is(CaseRelOp, Expr), + + /// Represents an ` TO ` guard. + To(Expr, Expr), +} + +/// Components of a branch of a `SELECT` statement. +#[derive(Debug, PartialEq)] +pub struct CaseSpan { + /// Expressions that guard execution of this case. + pub guards: Vec, + + /// Statements within the case block. + pub body: Vec, +} + +/// Components of a `SELECT` statement. +#[derive(Debug, PartialEq)] +pub struct SelectSpan { + /// Expression to test for. + pub expr: Expr, + + /// Representation of the cases to select from. The final `CASE ELSE`, if present, is also + /// included here without any guards. + pub cases: Vec, + + /// Position of the `END SELECT` statement. + pub end_pos: LineCol, +} + +/// Components of a `WHILE` statement. +#[derive(Debug, PartialEq)] +pub struct WhileSpan { + /// Expression to compute whether to execute the loop's body or not. + pub expr: Expr, + + /// Statements within the loop's body. + pub body: Vec, +} + +/// Represents a statement in the program along all data to execute it. +#[derive(Debug, PartialEq)] +pub enum Statement { + /// Represents an assignment to an element of an array. + ArrayAssignment(ArrayAssignmentSpan), + + /// Represents a variable assignment. + Assignment(AssignmentSpan), + + /// Represents a call to a builtin command such as `PRINT`. + Call(CallSpan), + + /// Represents a `FUNCTION` or `SUB` definition. The difference between the two lies in just + /// the presence or absence of a return type in the callable. + Callable(CallableSpan), + + /// Represents a `DATA` statement. + Data(DataSpan), + + /// Represents a `DECLARE` statement. + Declare(DeclareSpan), + + /// Represents a variable definition. + Dim(DimSpan), + + /// Represents an array definition. + DimArray(DimArraySpan), + + /// Represents a `DO` statement. + Do(DoSpan), + + /// Represents an `END` statement. + End(EndSpan), + + /// Represents an `EXIT DO` statement. + ExitDo(ExitSpan), + + /// Represents an `EXIT FOR` statement. + ExitFor(ExitSpan), + + /// Represents an `EXIT FUNCTION` statement. + ExitFunction(ExitSpan), + + /// Represents an `EXIT SUB` statement. + ExitSub(ExitSpan), + + /// Represents a `FOR` statement. + For(ForSpan), + + /// Represents a `GOSUB` statement. + Gosub(GotoSpan), + + /// Represents a `GOTO` statement. + Goto(GotoSpan), + + /// Represents an `IF` statement. + If(IfSpan), + + /// Represents a label "statement". + Label(LabelSpan), + + /// Represents an `ON ERROR` statement. + OnError(OnErrorSpan), + + /// Represents a `RETURN` statement. + Return(ReturnSpan), + + /// Represents a `SELECT` statement. + Select(SelectSpan), + + /// Represents a `WHILE` statement. + While(WhileSpan), +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_varref_display() { + assert_eq!("name", format!("{}", VarRef::new("name", None))); + assert_eq!("abc?", format!("{}", VarRef::new("abc", Some(ExprType::Boolean)))); + assert_eq!("cba#", format!("{}", VarRef::new("cba", Some(ExprType::Double)))); + assert_eq!("def%", format!("{}", VarRef::new("def", Some(ExprType::Integer)))); + assert_eq!("ghi$", format!("{}", VarRef::new("ghi", Some(ExprType::Text)))); + } + + #[test] + fn test_varref_accepts() { + assert!(VarRef::new("a", None).accepts(ExprType::Boolean)); + assert!(VarRef::new("a", None).accepts(ExprType::Double)); + assert!(VarRef::new("a", None).accepts(ExprType::Integer)); + assert!(VarRef::new("a", None).accepts(ExprType::Text)); + + assert!(VarRef::new("a", Some(ExprType::Boolean)).accepts(ExprType::Boolean)); + assert!(!VarRef::new("a", Some(ExprType::Boolean)).accepts(ExprType::Double)); + assert!(!VarRef::new("a", Some(ExprType::Boolean)).accepts(ExprType::Integer)); + assert!(!VarRef::new("a", Some(ExprType::Boolean)).accepts(ExprType::Text)); + + assert!(!VarRef::new("a", Some(ExprType::Double)).accepts(ExprType::Boolean)); + assert!(VarRef::new("a", Some(ExprType::Double)).accepts(ExprType::Double)); + assert!(!VarRef::new("a", Some(ExprType::Double)).accepts(ExprType::Integer)); + assert!(!VarRef::new("a", Some(ExprType::Double)).accepts(ExprType::Text)); + + assert!(!VarRef::new("a", Some(ExprType::Integer)).accepts(ExprType::Boolean)); + assert!(!VarRef::new("a", Some(ExprType::Integer)).accepts(ExprType::Double)); + assert!(VarRef::new("a", Some(ExprType::Integer)).accepts(ExprType::Integer)); + assert!(!VarRef::new("a", Some(ExprType::Integer)).accepts(ExprType::Text)); + + assert!(!VarRef::new("a", Some(ExprType::Text)).accepts(ExprType::Boolean)); + assert!(!VarRef::new("a", Some(ExprType::Text)).accepts(ExprType::Double)); + assert!(!VarRef::new("a", Some(ExprType::Text)).accepts(ExprType::Integer)); + assert!(VarRef::new("a", Some(ExprType::Text)).accepts(ExprType::Text)); + } +} diff --git a/core2/src/bytecode.rs b/core2/src/bytecode.rs new file mode 100644 index 00000000..9ba0d093 --- /dev/null +++ b/core2/src/bytecode.rs @@ -0,0 +1,1815 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Bytecode for a compiled EndBASIC program. + +use crate::ast::{ArgSep, ExprType}; +use crate::num::{ + unchecked_u32_as_u8, unchecked_u32_as_u16, unchecked_u32_as_usize, unchecked_u64_as_u8, +}; +use std::convert::TryFrom; +use std::fmt; + +/// Representation of the various register scopes. +#[derive(Debug)] +pub enum RegisterScope { + /// Global scope for variables visible from any scope. + Global, + + /// Local scope for variables visible only within a function or subroutine. + Local, + + /// Temporary scope for intermediate values during expression evaluation. + Temp, +} + +impl fmt::Display for RegisterScope { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + match self { + Self::Global => write!(f, "global"), + Self::Local => write!(f, "local"), + Self::Temp => write!(f, "temp"), + } + } +} + +/// Error to indicate an invalid `END` exit code. +#[derive(Debug, thiserror::Error)] +#[error("Exit code must be in the 0..127 range")] +pub struct InvalidExitCodeError(()); + +/// Error to indicate that we have run out of registers. +#[derive(Debug, thiserror::Error)] +#[error("Out of registers")] +pub(crate) struct OutOfRegistersError(()); + +/// Error to indicate that an array has too many dimensions. +#[derive(Debug, thiserror::Error)] +#[error("Too many dimensions")] +pub(crate) struct TooManyArrayDimensionsError(()); + +/// Error types for bytecode parsing. +#[derive(Debug, thiserror::Error)] +pub(crate) enum ParseError { + /// The type tag in the bytecode is not recognized. + #[error("{0}: Invalid type tag {0}")] + InvalidTypeTag(u64), +} + +/// Result type for bytecode parsing operations. +pub(crate) type ParseResult = Result; + +/// Program exit code carried by the `END` instruction. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct ExitCode(u8); + +impl ExitCode { + /// Returns true if this code represents successful execution. + pub fn is_success(self) -> bool { + self.0 == 0 + } + + /// Creates an `ExitCode` from an integer. + pub fn try_new(value: i32) -> Result { + if (0..128).contains(&value) { + Ok(Self(value as u8)) + } else { + Err(InvalidExitCodeError(())) + } + } + + /// Converts this exit code to an integer. + pub fn to_i32(self) -> i32 { + i32::from(self.0) + } +} + +impl TryFrom for ExitCode { + type Error = InvalidExitCodeError; + + fn try_from(value: i32) -> Result { + Self::try_new(value) + } +} + +/// Conversions between a primitive type and a `u32` for insertion into an instruction. +trait RawValue: Sized { + /// Converts a `u32` to the primitive type `Self`. + /// + /// This operation is only performed to _parse_ bytecode and we assume that the bytecode is + /// correctly formed. As a result, this does not perform any range checks. + fn from_u32(v: u32) -> Self; + + /// Converts the primitive type `Self` to a u32. + /// + /// This operation is only performed to _generate_ bytecode during compilation, and all + /// instruction definitions need to have fields that always fit in a u32. Consequently, + /// this operation is always safe. + fn to_u32(self) -> u32; +} + +/// Implements `RawValue` for an unsigned primitive type that is narrower than `u32`. +macro_rules! impl_raw_value { + ( $ty:ty, $from_u32_conv:ident ) => { + impl RawValue for $ty { + fn from_u32(v: u32) -> Self { + $from_u32_conv(v) + } + + fn to_u32(self) -> u32 { + u32::from(self) + } + } + }; +} + +impl_raw_value!(u8, unchecked_u32_as_u8); +impl_raw_value!(u16, unchecked_u32_as_u16); + +/// Representation of a register number. +/// +/// Registers are represented as `u8` integers where the first `Self::MAX_GLOBAL` values +/// correspond to global registers and the numbers after those correspond to local registers. +/// +/// During compilation, local register numbers are assigned starting from "logical 0" for +/// every scope in the call stack. During execution, local register numbers must be interpreted +/// in the context of the Frame Pointer (FP) register, which indicates the offset in the register +/// bank where local registers start for the current scope. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub(crate) struct Register(pub(crate) u8); + +impl fmt::Display for Register { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "R{}", self.0) + } +} + +impl RawValue for Register { + fn from_u32(v: u32) -> Self { + Self(unchecked_u32_as_u8(v)) + } + + fn to_u32(self) -> u32 { + u32::from(self.0) + } +} + +impl Register { + /// Maximum number of supported registers. + pub(crate) const MAX: u8 = u8::MAX; + + /// Maximum number of supported global registers. + pub(crate) const MAX_GLOBAL: u8 = 64; + + /// Constructs an instance of `Register` to represent the global register `reg`. Returns an + /// error if we have run out of global registers. + pub(crate) fn global(reg: u8) -> Result { + if reg < Self::MAX_GLOBAL { Ok(Self(reg)) } else { Err(OutOfRegistersError(())) } + } + + /// Constructs an instance of `Register` to represent the local register `reg`. Returns an + /// error if we have run out of local registers. + pub(crate) fn local(reg: u8) -> Result { + match reg.checked_add(Self::MAX_GLOBAL) { + Some(num) => Ok(Self(num)), + None => Err(OutOfRegistersError(())), + } + } + + /// Breaks apart the internal register representation and returns a tuple indicating if the + /// register is global or not and its logical index. + pub(crate) fn to_parts(self) -> (bool, u8) { + if self.0 < Self::MAX_GLOBAL { (true, self.0) } else { (false, self.0 - Self::MAX_GLOBAL) } + } +} + +/// A tagged reference to a variable (register) encoding the register's absolute address +/// and the type of the value it holds. +/// +/// The encoding stores the `ExprType` tag in the upper 32 bits and the absolute register +/// address in the lower 32 bits of a `u64`. +/// +/// This is distinct from `DatumPtr`, which points to data in the constant pool or heap +/// rather than to a register in the register file. +pub(crate) struct TaggedRegisterRef(u64); + +impl TaggedRegisterRef { + /// Creates a new tagged register reference from a register, frame pointer, and type. + pub(crate) fn new(reg: Register, fp: usize, vtype: ExprType) -> Self { + let (is_global, index) = reg.to_parts(); + let mut index = usize::from(index); + if !is_global { + index += fp; + } + + let index = u32::try_from(index).expect("Cannot support that many registers"); + Self(u64::from(vtype as u8) << 32 | u64::from(index)) + } + + /// Parses a tagged register reference from a raw `u64`, returning the absolute register + /// index and the type of the value it holds. + /// + /// Panics if the type tag is invalid. + pub(crate) fn parse(self) -> (usize, ExprType) { + let vtype: ExprType = { + #[allow(unsafe_code)] + unsafe { + let v = unchecked_u64_as_u8(self.0 >> 32); + assert!(v <= ExprType::Text as u8); + std::mem::transmute(v) + } + }; + + let index = unchecked_u32_as_usize((self.0 & 0xffffffff) as u32); + + (index, vtype) + } + + /// Returns the raw `u64` encoding. + pub(crate) fn as_u64(&self) -> u64 { + self.0 + } + + /// Wraps a raw `u64` as a `TaggedRegisterRef`. + pub(crate) fn from_u64(v: u64) -> Self { + Self(v) + } +} + +/// A packed representation of an array's element type and number of dimensions. +/// +/// The encoding stores the `ExprType` in the upper 4 bits and the dimension count in the +/// lower 4 bits of a single `u8`. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub(crate) struct PackedArrayType(u8); + +impl PackedArrayType { + /// Creates a new packed array type from a subtype and dimension count. + pub(crate) fn new( + subtype: ExprType, + ndims: usize, + ) -> Result { + if ndims > 15 { + return Err(TooManyArrayDimensionsError(())); + } + let ndims = ndims as u8; + Ok(Self(((subtype as u8) << 4) | (ndims & 0x0f))) + } + + /// Returns the element type. + pub(crate) fn subtype(self) -> ExprType { + ExprType::from_u32(u32::from(self.0 >> 4)) + } + + /// Returns the number of dimensions. + pub(crate) fn ndims(self) -> u8 { + self.0 & 0x0f + } +} + +impl fmt::Display for PackedArrayType { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "[{}]{}", self.ndims(), self.subtype().annotation()) + } +} + +impl RawValue for PackedArrayType { + fn from_u32(v: u32) -> Self { + Self(unchecked_u32_as_u8(v)) + } + + fn to_u32(self) -> u32 { + u32::from(self.0) + } +} + +impl RawValue for ExprType { + fn from_u32(v: u32) -> Self { + #[allow(unsafe_code)] + unsafe { + let v = unchecked_u32_as_u8(v); + assert!(v <= ExprType::Text as u8); + std::mem::transmute(v) + } + } + + fn to_u32(self) -> u32 { + u32::from(self as u8) + } +} + +/// Modes for the error handler configured by `ON ERROR`. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub(crate) enum ErrorHandlerMode { + /// Disable error handling. + None, + + /// Resume execution at the next statement after an error. + ResumeNext, + + /// Jump to a specific handler address after an error. + Jump, +} + +impl RawValue for ErrorHandlerMode { + fn from_u32(v: u32) -> Self { + #[allow(unsafe_code)] + unsafe { + let v = unchecked_u32_as_u8(v); + assert!(v <= ErrorHandlerMode::Jump as u8); + std::mem::transmute(v) + } + } + + fn to_u32(self) -> u32 { + u32::from(self as u8) + } +} + +impl fmt::Display for ErrorHandlerMode { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::None => write!(f, "NONE"), + Self::ResumeNext => write!(f, "RESUME_NEXT"), + Self::Jump => write!(f, "JUMP"), + } + } +} + +/// Generates functions to construct an instruction's bytecode representation for the compiler's +/// benefit, to parse it for the VM's benefit, and to format it for debugging purposes. +macro_rules! instr { + ( $opcode:expr, $name:expr, + $make:ident, $parse:ident, $format:ident, + ) => { + pub(crate) fn $make() -> u32 { + ($opcode as u32) << 24 + } + + pub(crate) fn $parse(op: u32) { + debug_assert_eq!($opcode as u32, op >> 24); + } + + pub(crate) fn $format(op: u32) -> String { + $parse(op); + $name.to_owned() + } + }; + + ( $opcode:expr, $name: expr, + $make:ident, $parse:ident, $format:ident, + $type1:ty, $mask1:expr, $offset1:expr, + ) => { + pub(crate) fn $make(v1: $type1) -> u32 { + let v1 = (RawValue::to_u32(v1) & $mask1) << $offset1; + (($opcode as u32) << 24) | v1 + } + + pub(crate) fn $parse(op: u32) -> $type1 { + debug_assert_eq!($opcode as u32, op >> 24); + let v1 = RawValue::from_u32((op >> $offset1) & $mask1); + v1 + } + + pub(crate) fn $format(op: u32) -> String { + let v1 = $parse(op); + format!("{:11} {}", $name, v1) + } + }; + + ( $opcode:expr, $name:expr, + $make:ident, $parse:ident, $format:ident, + $type1:ty, $mask1:expr, $offset1:expr, + $type2:ty, $mask2:expr, $offset2:expr, + ) => { + pub(crate) fn $make(v1: $type1, v2: $type2) -> u32 { + let v1 = (RawValue::to_u32(v1) & $mask1) << $offset1; + let v2 = (RawValue::to_u32(v2) & $mask2) << $offset2; + (($opcode as u32) << 24) | v1 | v2 + } + + pub(crate) fn $parse(op: u32) -> ($type1, $type2) { + debug_assert_eq!($opcode as u32, op >> 24); + let v1 = RawValue::from_u32((op >> $offset1) & $mask1); + let v2 = RawValue::from_u32((op >> $offset2) & $mask2); + (v1, v2) + } + + pub(crate) fn $format(op: u32) -> String { + let (v1, v2) = $parse(op); + format!("{:11} {}, {}", $name, v1, v2) + } + }; + + ( $opcode:expr, $name:expr, + $make:ident, $parse:ident, $format:ident, + $type1:ty, $mask1:expr, $offset1:expr, + $type2:ty, $mask2:expr, $offset2:expr, + $type3:ty, $mask3:expr, $offset3:expr, + ) => { + pub(crate) fn $make(v1: $type1, v2: $type2, v3: $type3) -> u32 { + let v1 = (RawValue::to_u32(v1) & $mask1) << $offset1; + let v2 = (RawValue::to_u32(v2) & $mask2) << $offset2; + let v3 = (RawValue::to_u32(v3) & $mask3) << $offset3; + (($opcode as u32) << 24) | v1 | v2 | v3 + } + + pub(crate) fn $parse(op: u32) -> ($type1, $type2, $type3) { + debug_assert_eq!($opcode as u32, op >> 24); + let v1 = RawValue::from_u32((op >> $offset1) & $mask1); + let v2 = RawValue::from_u32((op >> $offset2) & $mask2); + let v3 = RawValue::from_u32((op >> $offset3) & $mask3); + (v1, v2, v3) + } + + pub(crate) fn $format(op: u32) -> String { + let (v1, v2, v3) = $parse(op); + format!("{:11} {}, {}, {}", $name, v1, v2, v3) + } + }; +} + +/// Enumeration of all valid instruction types (opcodes). +/// +/// The specific numbers assigned to each instruction are not important at this moment because +/// we expect bytecode execution to always be coupled with generation (which means there is no +/// need to worry about stable values over time). +#[repr(u8)] +pub(crate) enum Opcode { + /// Adds two doubles and stores the result into a third one. + AddDouble, + + /// Adds two integers and stores the result into a third one. + AddInteger, + + /// Allocates an object on the heap. + Alloc, + + /// Allocates a multidimensional array on the heap. + AllocArray, + + /// Computes the bitwise AND of two integers and stores the result into a third one. + BitwiseAnd, + + /// Computes the bitwise NOT of an integer value in place. + BitwiseNot, + + /// Computes the bitwise OR of two integers and stores the result into a third one. + BitwiseOr, + + /// Computes the bitwise XOR of two integers and stores the result into a third one. + BitwiseXor, + + /// Calls an address relative to the PC. + Call, + + /// Concatenates two strings and stores the pointer to the result into a third one. + Concat, + + /// Divides two doubles and stores the result into a third one. + DivideDouble, + + /// Divides two integers and stores the result into a third one. + DivideInteger, + + /// Converts the double value in a register to an integer. + DoubleToInteger, + + /// Compares two booleans for equality and stores the result into a third one. + EqualBoolean, + + /// Compares two doubles for equality and stores the result into a third one. + EqualDouble, + + /// Compares two integers for equality and stores the result into a third one. + EqualInteger, + + /// Compares two strings for equality and stores the result into a third one. + EqualText, + + /// Jumps to a subroutine at an address relative to the PC. + Gosub, + + /// Compares two doubles for greater-than and stores the result into a third one. + GreaterDouble, + + /// Compares two doubles for greater-than-or-equal and stores the result into a third one. + GreaterEqualDouble, + + /// Compares two integers for greater-than-or-equal and stores the result into a third one. + GreaterEqualInteger, + + /// Compares two strings for greater-than-or-equal and stores the result into a third one. + GreaterEqualText, + + /// Compares two integers for greater-than and stores the result into a third one. + GreaterInteger, + + /// Compares two strings for greater-than and stores the result into a third one. + GreaterText, + + /// Converts the integer value in a register to a double. + IntegerToDouble, + + /// Jumps to an address relative to the PC. + Jump, + + /// Jumps to an address relative to the PC if the condition register is false (0). + JumpIfFalse, + + /// Compares two doubles for less-than and stores the result into a third one. + LessDouble, + + /// Compares two doubles for less-than-or-equal and stores the result into a third one. + LessEqualDouble, + + /// Compares two integers for less-than-or-equal and stores the result into a third one. + LessEqualInteger, + + /// Compares two strings for less-than-or-equal and stores the result into a third one. + LessEqualText, + + /// Compares two integers for less-than and stores the result into a third one. + LessInteger, + + /// Compares two strings for less-than and stores the result into a third one. + LessText, + + /// Loads an element from an array. + LoadArray, + + /// Loads a constant into a register. + LoadConstant, + + /// Loads an integer immediate into a register. + LoadInteger, + + /// Loads a register pointer into a register. + LoadRegisterPointer, + + /// Computes the modulo of two doubles and stores the result into a third one. + ModuloDouble, + + /// Computes the modulo of two integers and stores the result into a third one. + ModuloInteger, + + /// Moves (copies) data between two registers. + Move, + + /// Multiplies two doubles and stores the result into a third one. + MultiplyDouble, + + /// Multiplies two integers and stores the result into a third one. + MultiplyInteger, + + /// Negates a double value in place. + NegateDouble, + + /// Negates an integer value in place. + NegateInteger, + + /// Compares two booleans for inequality and stores the result into a third one. + NotEqualBoolean, + + /// Compares two doubles for inequality and stores the result into a third one. + NotEqualDouble, + + /// Compares two integers for inequality and stores the result into a third one. + NotEqualInteger, + + /// Compares two strings for inequality and stores the result into a third one. + NotEqualText, + + /// The "null" instruction, used by the compiler to pad the code for fixups. + Nop, + + /// Computes the power of two doubles and stores the result into a third one. + PowerDouble, + + /// Computes the power of two integers and stores the result into a third one. + PowerInteger, + + /// Returns from a previous `Call`. + Return, + + /// Sets the error handler mode and target address. + SetErrorHandler, + + /// Shifts an integer left by a number of bits without rotation, storing the result into + /// a third register. + ShiftLeft, + + /// Shifts an integer right by a number of bits without rotation, storing the result into + /// a third register. + ShiftRight, + + /// Stores a value into an array element. + StoreArray, + + /// Subtracts two doubles and stores the result into a third one. + SubtractDouble, + + /// Subtracts two integers and stores the result into a third one. + SubtractInteger, + + /// Terminates execution with an explicit exit code. + End, + + /// Requests the execution of an upcall, stopping VM execution. + Upcall, + + /// Terminates execution due to natural fallthrough. + // KEEP THIS LAST. + Eof, +} + +#[rustfmt::skip] +instr!( + Opcode::AddDouble, "ADDD", + make_add_double, parse_add_double, format_add_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::AddInteger, "ADDI", + make_add_integer, parse_add_integer, format_add_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::Alloc, "ALLOC", + make_alloc, parse_alloc, format_alloc, + Register, 0x000000ff, 8, // Destination register in which to store the heap pointer. + ExprType, 0x000000ff, 0, // Type of the object to allocate. +); + +#[rustfmt::skip] +instr!( + Opcode::AllocArray, "ALLOCA", + make_alloc_array, parse_alloc_array, format_alloc_array, + Register, 0x000000ff, 16, // Destination register to store the array pointer. + PackedArrayType, 0x000000ff, 8, // Packed element type and dimension count. + Register, 0x000000ff, 0, // First register containing dimension sizes. +); + +#[rustfmt::skip] +instr!( + Opcode::BitwiseAnd, "AND", + make_bitwise_and, parse_bitwise_and, format_bitwise_and, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::BitwiseNot, "NOT", + make_bitwise_not, parse_bitwise_not, format_bitwise_not, + Register, 0x000000ff, 0, // Register with the value to NOT in place. +); + +#[rustfmt::skip] +instr!( + Opcode::BitwiseOr, "OR", + make_bitwise_or, parse_bitwise_or, format_bitwise_or, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::BitwiseXor, "XOR", + make_bitwise_xor, parse_bitwise_xor, format_bitwise_xor, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::Call, "CALL", + make_call, parse_call, format_call, + Register, 0x000000ff, 16, // Destination register for the return value, if any. + u16, 0x0000ffff, 0, // Target address. +); + +#[rustfmt::skip] +instr!( + Opcode::Concat, "CONCAT", + make_concat, parse_concat, format_concat, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::DivideDouble, "DIVD", + make_divide_double, parse_divide_double, format_divide_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::DivideInteger, "DIVI", + make_divide_integer, parse_divide_integer, format_divide_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::DoubleToInteger, "DTOI", + make_double_to_integer, parse_double_to_integer, format_double_to_integer, + Register, 0x000000ff, 0, // Register with the value to convert. +); + +#[rustfmt::skip] +instr!( + Opcode::EqualBoolean, "CMPEQB", + make_equal_boolean, parse_equal_boolean, format_equal_boolean, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::EqualDouble, "CMPEQD", + make_equal_double, parse_equal_double, format_equal_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::EqualInteger, "CMPEQI", + make_equal_integer, parse_equal_integer, format_equal_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::EqualText, "CMPEQS", + make_equal_text, parse_equal_text, format_equal_text, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::End, "END", + make_end, parse_end, format_end, + Register, 0x000000ff, 0, // Register with the return code. +); + +#[rustfmt::skip] +instr!( + Opcode::Eof, "EOF", + make_eof, parse_eof, format_eof, +); + +#[rustfmt::skip] +instr!( + Opcode::Gosub, "GOSUB", + make_gosub, parse_gosub, format_gosub, + u16, 0x0000ffff, 0, // Target address. +); + +#[rustfmt::skip] +instr!( + Opcode::GreaterDouble, "CMPGTD", + make_greater_double, parse_greater_double, format_greater_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::GreaterEqualDouble, "CMPGED", + make_greater_equal_double, parse_greater_equal_double, format_greater_equal_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::GreaterEqualInteger, "CMPGEI", + make_greater_equal_integer, parse_greater_equal_integer, format_greater_equal_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::GreaterEqualText, "CMPGES", + make_greater_equal_text, parse_greater_equal_text, format_greater_equal_text, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::GreaterInteger, "CMPGTI", + make_greater_integer, parse_greater_integer, format_greater_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::GreaterText, "CMPGTS", + make_greater_text, parse_greater_text, format_greater_text, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::IntegerToDouble, "ITOD", + make_integer_to_double, parse_integer_to_double, format_integer_to_double, + Register, 0x000000ff, 0, // Register with the value to convert. +); + +#[rustfmt::skip] +instr!( + Opcode::Jump, "JUMP", + make_jump, parse_jump, format_jump, + u16, 0x0000ffff, 0, // Target address. +); + +#[rustfmt::skip] +instr!( + Opcode::JumpIfFalse, "JMPF", + make_jump_if_false, parse_jump_if_false, format_jump_if_false, + Register, 0x000000ff, 16, // Condition register; if 0 (false), jump to target. + u16, 0x0000ffff, 0, // Target address. +); + +#[rustfmt::skip] +instr!( + Opcode::LessDouble, "CMPLTD", + make_less_double, parse_less_double, format_less_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::LessEqualDouble, "CMPLED", + make_less_equal_double, parse_less_equal_double, format_less_equal_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::LessEqualInteger, "CMPLEI", + make_less_equal_integer, parse_less_equal_integer, format_less_equal_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::LessEqualText, "CMPLES", + make_less_equal_text, parse_less_equal_text, format_less_equal_text, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::LessInteger, "CMPLTI", + make_less_integer, parse_less_integer, format_less_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::LessText, "CMPLTS", + make_less_text, parse_less_text, format_less_text, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::LoadArray, "LOADA", + make_load_array, parse_load_array, format_load_array, + Register, 0x000000ff, 16, // Destination register for the loaded value. + Register, 0x000000ff, 8, // Register containing the array pointer. + Register, 0x000000ff, 0, // First register containing subscript values. +); + +#[rustfmt::skip] +instr!( + Opcode::LoadConstant, "LOADC", + make_load_constant, parse_load_constant, format_load_constant, + Register, 0x000000ff, 16, // Destination register to load the constant into. + u16, 0x0000ffff, 0, // Index of the constant to load. +); + +#[rustfmt::skip] +instr!( + Opcode::LoadInteger, "LOADI", + make_load_integer, parse_load_integer, format_load_integer, + Register, 0x000000ff, 16, // Destination register to load the immediate into. + u16, 0x0000ffff, 0, // Immediate value. +); + +#[rustfmt::skip] +instr!( + Opcode::LoadRegisterPointer, "LOADRP", + make_load_register_ptr, parse_load_register_ptr, format_load_register_ptr, + Register, 0x000000ff, 16, // Destination register to load the immediate into. + ExprType, 0x000000ff, 8, // Type of the value pointed to. + Register, 0x000000ff, 0, // Register to load. +); + +#[rustfmt::skip] +instr!( + Opcode::ModuloDouble, "MODD", + make_modulo_double, parse_modulo_double, format_modulo_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::ModuloInteger, "MODI", + make_modulo_integer, parse_modulo_integer, format_modulo_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::Move, "MOVE", + make_move, parse_move, format_move, + Register, 0x000000ff, 8, // Destination register. + Register, 0x000000ff, 0, // Source register. +); + +#[rustfmt::skip] +instr!( + Opcode::MultiplyDouble, "MULD", + make_multiply_double, parse_multiply_double, format_multiply_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::MultiplyInteger, "MULI", + make_multiply_integer, parse_multiply_integer, format_multiply_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::NegateDouble, + "NEGD", + make_negate_double, + parse_negate_double, + format_negate_double, + Register, + 0x000000ff, + 0, // Register with the value to negate in place. +); + +#[rustfmt::skip] +instr!( + Opcode::NegateInteger, "NEGI", + make_negate_integer, parse_negate_integer, format_negate_integer, + Register, 0x000000ff, 0, // Register with the value to negate in place. +); + +#[rustfmt::skip] +instr!( + Opcode::NotEqualBoolean, "CMPNEB", + make_not_equal_boolean, parse_not_equal_boolean, format_not_equal_boolean, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::NotEqualDouble, "CMPNED", + make_not_equal_double, parse_not_equal_double, format_not_equal_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::NotEqualInteger, "CMPNEI", + make_not_equal_integer, parse_not_equal_integer, format_not_equal_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::NotEqualText, "CMPNES", + make_not_equal_text, parse_not_equal_text, format_not_equal_text, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::Nop, "NOP", + make_nop, parse_nop, format_nop, +); + +#[rustfmt::skip] +instr!( + Opcode::PowerDouble, "POWD", + make_power_double, parse_power_double, format_power_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::PowerInteger, "POWI", + make_power_integer, parse_power_integer, format_power_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::Return, "RETURN", + make_return, parse_return, format_return, +); + +#[rustfmt::skip] +instr!( + Opcode::SetErrorHandler, "SETEH", + make_set_error_handler, parse_set_error_handler, format_set_error_handler, + ErrorHandlerMode, 0x000000ff, 16, // Error handler mode. + u16, 0x0000ffff, 0, // Target address for Jump mode. +); + +#[rustfmt::skip] +instr!( + Opcode::ShiftLeft, "SHL", + make_shift_left, parse_shift_left, format_shift_left, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Value to shift. + Register, 0x000000ff, 0, // Number of bits to shift by. +); + +#[rustfmt::skip] +instr!( + Opcode::ShiftRight, "SHR", + make_shift_right, parse_shift_right, format_shift_right, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Value to shift. + Register, 0x000000ff, 0, // Number of bits to shift by. +); + +#[rustfmt::skip] +instr!( + Opcode::StoreArray, "STOREA", + make_store_array, parse_store_array, format_store_array, + Register, 0x000000ff, 16, // Register containing the array pointer. + Register, 0x000000ff, 8, // Register containing the value to store. + Register, 0x000000ff, 0, // First register containing subscript values. +); + +#[rustfmt::skip] +instr!( + Opcode::SubtractDouble, "SUBD", + make_subtract_double, parse_subtract_double, format_subtract_double, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::SubtractInteger, "SUBI", + make_subtract_integer, parse_subtract_integer, format_subtract_integer, + Register, 0x000000ff, 16, // Destination register to store the result of the operation. + Register, 0x000000ff, 8, // Left hand side value. + Register, 0x000000ff, 0, // Right hand side value. +); + +#[rustfmt::skip] +instr!( + Opcode::Upcall, "UPCALL", + make_upcall, parse_upcall, format_upcall, + u16, 0x0000ffff, 8, // Index of the upcall to execute. + Register, 0x000000ff, 0, // First register with arguments. +); + +/// Returns the opcode of an instruction. +pub(crate) fn opcode_of(instr: u32) -> Opcode { + #[allow(unsafe_code)] + unsafe { + let num = unchecked_u32_as_u8(instr >> 24); + debug_assert!(num <= Opcode::Eof as u8); + std::mem::transmute::(num) + } +} + +/// Tags used as integer register values to identify the type stored in another register at +/// runtime. +/// +/// This is used in function and command calls that receive variadic arguments (such as `PRINT`) +/// to identify the types of the arguments (which can be missing) and separators. +#[derive(Clone, Copy, Debug, PartialEq)] +#[repr(u8)] +pub enum VarArgTag { + /// The argument is missing. This is only possible for command invocations. + Missing(ArgSep) = 0, + + /// The argument is an immediate of the given type. + Immediate(ArgSep, ExprType) = 1, + + /// The argument is a pointer. + Pointer(ArgSep) = 2, +} + +impl VarArgTag { + /// Parses a register `value` into a variadic argument tag. + // This is not `TryFrom` because that makes this interface public and forces us to make the + // result type public as well, but we don't need it to be. + pub(crate) fn parse_u64(value: u64) -> ParseResult { + if value & !(0x0fff) != 0 { + return Err(ParseError::InvalidTypeTag(value)); + }; + + let key_u8 = ((value & 0x0f00) >> 8) as u8; + let sep_u8 = ((value & 0x00f0) >> 4) as u8; + let other_u8 = (value & 0x000f) as u8; + + let Ok(sep) = ArgSep::try_from(sep_u8) else { + return Err(ParseError::InvalidTypeTag(value)); + }; + + match key_u8 { + 0 => { + if other_u8 == 0 { + Ok(Self::Missing(sep)) + } else { + Err(ParseError::InvalidTypeTag(value)) + } + } + 1 => match ExprType::try_from(other_u8) { + Ok(etype) => Ok(Self::Immediate(sep, etype)), + Err(_) => Err(ParseError::InvalidTypeTag(value)), + }, + 2 => { + if other_u8 == 0 { + Ok(Self::Pointer(sep)) + } else { + Err(ParseError::InvalidTypeTag(value)) + } + } + _ => Err(ParseError::InvalidTypeTag(value)), + } + } + + /// Makes a new tag for the type of a variadic argument. + pub(crate) fn make_u16(self) -> u16 { + let (key_u8, sep, other_u8): (u8, ArgSep, u8) = match self { + Self::Missing(sep) => (0, sep, 0), + Self::Immediate(sep, etype) => (1, sep, etype as u8), + Self::Pointer(sep) => (2, sep, 0), + }; + u16::from(key_u8) << 8 | u16::from(sep as u8) << 4 | u16::from(other_u8) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + macro_rules! test_instr { + ( $name:ident, $make:ident, $parse:ident ) => { + #[test] + fn $name() { + let instr = $make(); + $parse(instr); + } + }; + + ( $name:ident, $make:ident, $parse:ident, $v1:expr ) => { + #[test] + fn $name() { + let instr = $make($v1); + assert_eq!($v1, $parse(instr)); + } + }; + + ( $name:ident, $make:ident, $parse:ident, $v1:expr, $v2:expr ) => { + #[test] + fn $name() { + let instr = $make($v1, $v2); + assert_eq!(($v1, $v2), $parse(instr)); + } + }; + + ( $name:ident, $make:ident, $parse:ident, $v1:expr, $v2:expr, $v3:expr ) => { + #[test] + fn $name() { + let instr = $make($v1, $v2, $v3); + assert_eq!(($v1, $v2, $v3), $parse(instr)); + } + }; + } + + test_instr!( + test_add_double, + make_add_double, + parse_add_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_add_integer, + make_add_integer, + parse_add_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_alloc, + make_alloc, + parse_alloc, + Register::local(1).unwrap(), + ExprType::Integer + ); + + test_instr!( + test_alloc_array, + make_alloc_array, + parse_alloc_array, + Register::local(1).unwrap(), + PackedArrayType::new(ExprType::Integer, 3).unwrap(), + Register::local(2).unwrap() + ); + + test_instr!( + test_bitwise_and, + make_bitwise_and, + parse_bitwise_and, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!(test_bitwise_not, make_bitwise_not, parse_bitwise_not, Register::local(1).unwrap()); + + test_instr!( + test_bitwise_or, + make_bitwise_or, + parse_bitwise_or, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_bitwise_xor, + make_bitwise_xor, + parse_bitwise_xor, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!(test_call, make_call, parse_call, Register::local(3).unwrap(), 12345); + + test_instr!( + test_concat, + make_concat, + parse_concat, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_divide_double, + make_divide_double, + parse_divide_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_divide_integer, + make_divide_integer, + parse_divide_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_double_to_integer, + make_double_to_integer, + parse_double_to_integer, + Register::local(1).unwrap() + ); + + test_instr!( + test_equal_boolean, + make_equal_boolean, + parse_equal_boolean, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_equal_double, + make_equal_double, + parse_equal_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_equal_integer, + make_equal_integer, + parse_equal_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_equal_text, + make_equal_text, + parse_equal_text, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!(test_end, make_end, parse_end, Register::local(1).unwrap()); + + test_instr!(test_eof, make_eof, parse_eof); + + test_instr!(test_gosub, make_gosub, parse_gosub, 12345); + + test_instr!( + test_greater_double, + make_greater_double, + parse_greater_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_greater_equal_double, + make_greater_equal_double, + parse_greater_equal_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_greater_equal_integer, + make_greater_equal_integer, + parse_greater_equal_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_greater_equal_text, + make_greater_equal_text, + parse_greater_equal_text, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_greater_integer, + make_greater_integer, + parse_greater_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_greater_text, + make_greater_text, + parse_greater_text, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_integer_to_double, + make_integer_to_double, + parse_integer_to_double, + Register::local(1).unwrap() + ); + + test_instr!(test_jump, make_jump, parse_jump, 12345); + + test_instr!( + test_jump_if_false, + make_jump_if_false, + parse_jump_if_false, + Register::local(1).unwrap(), + 12345 + ); + + test_instr!( + test_less_double, + make_less_double, + parse_less_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_less_equal_double, + make_less_equal_double, + parse_less_equal_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_less_equal_integer, + make_less_equal_integer, + parse_less_equal_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_less_equal_text, + make_less_equal_text, + parse_less_equal_text, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_less_integer, + make_less_integer, + parse_less_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_less_text, + make_less_text, + parse_less_text, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_load_array, + make_load_array, + parse_load_array, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_load_constant, + make_load_constant, + parse_load_constant, + Register::local(1).unwrap(), + 12345 + ); + + test_instr!( + test_load_integer, + make_load_integer, + parse_load_integer, + Register::local(1).unwrap(), + 12345 + ); + + test_instr!( + test_load_register_ptr, + make_load_register_ptr, + parse_load_register_ptr, + Register::local(1).unwrap(), + ExprType::Double, + Register::local(2).unwrap() + ); + + test_instr!( + test_modulo_double, + make_modulo_double, + parse_modulo_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_modulo_integer, + make_modulo_integer, + parse_modulo_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_move, + make_move, + parse_move, + Register::local(1).unwrap(), + Register::local(2).unwrap() + ); + + test_instr!( + test_multiply_double, + make_multiply_double, + parse_multiply_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_multiply_integer, + make_multiply_integer, + parse_multiply_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_negate_double, + make_negate_double, + parse_negate_double, + Register::local(1).unwrap() + ); + + test_instr!( + test_negate_integer, + make_negate_integer, + parse_negate_integer, + Register::local(1).unwrap() + ); + + test_instr!( + test_not_equal_boolean, + make_not_equal_boolean, + parse_not_equal_boolean, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_not_equal_double, + make_not_equal_double, + parse_not_equal_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_not_equal_integer, + make_not_equal_integer, + parse_not_equal_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_not_equal_text, + make_not_equal_text, + parse_not_equal_text, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!(test_nop, make_nop, parse_nop); + + test_instr!( + test_power_double, + make_power_double, + parse_power_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_power_integer, + make_power_integer, + parse_power_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!(test_return, make_return, parse_return); + + test_instr!( + test_shift_left, + make_shift_left, + parse_shift_left, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_shift_right, + make_shift_right, + parse_shift_right, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_store_array, + make_store_array, + parse_store_array, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_subtract_double, + make_subtract_double, + parse_subtract_double, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!( + test_subtract_integer, + make_subtract_integer, + parse_subtract_integer, + Register::local(1).unwrap(), + Register::local(2).unwrap(), + Register::local(3).unwrap() + ); + + test_instr!(test_upcall, make_upcall, parse_upcall, 12345, Register::local(3).unwrap()); + + #[test] + fn test_exit_code_try_ok() { + assert_eq!(ExitCode(0), ExitCode::try_from(0).unwrap()); + assert_eq!(ExitCode(127), ExitCode::try_from(127).unwrap()); + assert!(ExitCode::try_from(0).unwrap().is_success()); + assert!(!ExitCode::try_from(127).unwrap().is_success()); + } + + #[test] + fn test_exit_code_try_errors() { + assert!(ExitCode::try_from(-1).is_err()); + assert!(ExitCode::try_from(128).is_err()); + } + + #[test] + fn test_packed_array_type_round_trip() { + for subtype in [ExprType::Boolean, ExprType::Double, ExprType::Integer, ExprType::Text] { + for ndims in [1, 2, 5, 15] { + let packed = PackedArrayType::new(subtype, ndims).unwrap(); + assert_eq!(subtype, packed.subtype()); + assert_eq!(ndims, usize::from(packed.ndims())); + } + } + } + + #[test] + fn test_packed_array_type_display() { + let p = PackedArrayType::new(ExprType::Integer, 2).unwrap(); + assert_eq!("[2]%", format!("{}", p)); + let p = PackedArrayType::new(ExprType::Text, 1).unwrap(); + assert_eq!("[1]$", format!("{}", p)); + } + + #[test] + fn test_var_arg_tag_ok() { + for sep in [ArgSep::As, ArgSep::End, ArgSep::Long, ArgSep::Short] { + for vat in [ + VarArgTag::Missing(sep), + VarArgTag::Pointer(sep), + VarArgTag::Immediate(sep, ExprType::Boolean), + VarArgTag::Immediate(sep, ExprType::Double), + VarArgTag::Immediate(sep, ExprType::Integer), + VarArgTag::Immediate(sep, ExprType::Text), + ] { + assert_eq!(vat, VarArgTag::parse_u64(u64::from(VarArgTag::make_u16(vat))).unwrap()); + } + } + } + + #[test] + fn test_var_arg_tag_errors() { + // Larger than 12 bits. + VarArgTag::parse_u64(1 << 12).unwrap_err(); + + // Invalid tag type. + VarArgTag::parse_u64(0x00000500).unwrap_err(); + + // Missing tag with invalid payload. + VarArgTag::parse_u64(0x00000001).unwrap_err(); + + // Missing tag with invalid separator. + VarArgTag::parse_u64(0x00000040).unwrap_err(); + + // ExprType tag with invalid payload. + VarArgTag::parse_u64(0x00000104).unwrap_err(); + + // ExprType tag with invalid separator. + VarArgTag::parse_u64(0x00000140).unwrap_err(); + + // Pointer tag with invalid payload. + VarArgTag::parse_u64(0x00000201).unwrap_err(); + + // Pointer tag with invalid separator. + VarArgTag::parse_u64(0x00000240).unwrap_err(); + } +} diff --git a/core2/src/callable.rs b/core2/src/callable.rs new file mode 100644 index 00000000..8ba991d2 --- /dev/null +++ b/core2/src/callable.rs @@ -0,0 +1,921 @@ +// EndBASIC +// Copyright 2021 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Symbol definitions and symbols table representation. + +use crate::ast::ArgSep; +use crate::ast::ExprType; +use crate::bytecode::TaggedRegisterRef; +use crate::bytecode::VarArgTag; +use crate::mem::{ConstantDatum, DatumPtr, HeapDatum}; +use crate::num::unchecked_usize_as_u32; +use crate::reader::LineCol; +use async_trait::async_trait; +use std::borrow::Cow; +use std::fmt; +use std::io; +use std::ops::RangeInclusive; +use std::rc::Rc; +use std::str::Lines; + +/// Error types for callable execution. +#[derive(Debug, thiserror::Error)] +pub enum CallError { + /// I/O error. + #[error("{0}")] + IoError(#[from] io::Error), + + /// Indicates to the caller that it must clear state. + /// + /// This is a hack to support implementing `CLEAR` without explicit support in core. + /// The need for this command is rare, so adding first-class support is unnecessary. + /// Ideally, though, we could maybe change the `Vm` to support returning a `T` for + /// callables instead of (), and then turn this into a proper std-owned enum. + #[error("Machine requires state clearing")] + NeedsClear, + + /// Generic error with a static message. + #[error("{0}")] + Other(&'static str), + + /// Indicates a syntax error only detectable at runtime. + #[error("{1}")] + Syntax(LineCol, String), +} + +/// Result type for callable execution. +pub type CallResult = Result; + +/// Syntax specification for a required scalar parameter. +#[derive(Clone, Debug, PartialEq)] +pub struct RequiredValueSyntax { + /// The name of the parameter for help purposes. + pub name: Cow<'static, str>, + + /// The type of the expected parameter. + pub vtype: ExprType, +} + +/// Syntax specification for a required reference parameter. +#[derive(Clone, Debug, PartialEq)] +pub struct RequiredRefSyntax { + /// The name of the parameter for help purposes. + pub name: Cow<'static, str>, + + /// If true, require an array reference; if false, a variable reference. + pub require_array: bool, + + /// If true, allow references to undefined variables because the command will define them when + /// missing. Can only be set to true for commands, not functions, and `require_array` must be + /// false. + pub define_undefined: bool, +} + +/// Syntax specification for an optional scalar parameter. +/// +/// Optional parameters are only supported in commands. +#[derive(Clone, Debug, PartialEq)] +pub struct OptionalValueSyntax { + /// The name of the parameter for help purposes. + pub name: Cow<'static, str>, + + /// The type of the expected parameter. + pub vtype: ExprType, +} + +/// Specifies the type constraints for a repeated parameter. +#[derive(Clone, Debug, PartialEq)] +pub enum RepeatedTypeSyntax { + /// Allows any value type, including empty arguments. The values pushed onto the stack have + /// the same semantics as those pushed by `AnyValueSyntax`. + AnyValue, + + /// Expects a value of the given type. + TypedValue(ExprType), + + /// Expects a reference to a variable (not an array) and allows the variables to not be defined. + VariableRef, +} + +/// Syntax specification for a repeated parameter. +/// +/// The repeated parameter must appear after all singular positional parameters. +#[derive(Clone, Debug, PartialEq)] +pub struct RepeatedSyntax { + /// The name of the parameter for help purposes. + pub name: Cow<'static, str>, + + /// The type of the expected parameters. + pub type_syn: RepeatedTypeSyntax, + + /// The separator to expect between the repeated parameters. For functions, this must be the + /// long separator (the comma). + pub sep: ArgSepSyntax, + + /// Whether the repeated parameter must at least have one element or not. + pub require_one: bool, + + /// Whether to allow any parameter to not be present or not. Can only be true for commands. + pub allow_missing: bool, +} + +impl RepeatedSyntax { + /// Formats the repeated argument syntax for help purposes into `output`. + /// + /// `last_singular_sep` contains the separator of the last singular argument syntax, if any, + /// which we need to place inside of the optional group. + fn describe(&self, output: &mut String, last_singular_sep: Option<&ArgSepSyntax>) { + if !self.require_one { + output.push('['); + } + + if let Some(sep) = last_singular_sep { + sep.describe(output); + } + + output.push_str(&self.name); + output.push('1'); + if let RepeatedTypeSyntax::TypedValue(vtype) = self.type_syn { + output.push(vtype.annotation()); + } + + if self.require_one { + output.push('['); + } + + self.sep.describe(output); + output.push_str(".."); + self.sep.describe(output); + + output.push_str(&self.name); + output.push('N'); + if let RepeatedTypeSyntax::TypedValue(vtype) = self.type_syn { + output.push(vtype.annotation()); + } + + output.push(']'); + } +} + +/// Syntax specification for a parameter that accepts any scalar type. +#[derive(Clone, Debug, PartialEq)] +pub struct AnyValueSyntax { + /// The name of the parameter for help purposes. + pub name: Cow<'static, str>, + + /// Whether to allow the parameter to not be present or not. Can only be true for commands. + pub allow_missing: bool, +} + +/// Specifies the expected argument separator in a callable's syntax. +#[derive(Copy, Clone, Debug, PartialEq)] +pub enum ArgSepSyntax { + /// The argument separator must exactly be the one given. + Exactly(ArgSep), + + /// The argument separator may be any of the ones given. + OneOf(&'static [ArgSep]), + + /// The argument separator is the end of the call. + End, +} + +impl ArgSepSyntax { + /// Formats the argument separator for help purposes into `output`. + fn describe(&self, output: &mut String) { + match self { + ArgSepSyntax::Exactly(sep) => { + let (text, needs_space) = sep.describe(); + + if !text.is_empty() && needs_space { + output.push(' '); + } + output.push_str(text); + if !text.is_empty() { + output.push(' '); + } + } + + ArgSepSyntax::OneOf(seps) => { + output.push_str(" <"); + for (i, sep) in seps.iter().enumerate() { + let (text, _needs_space) = sep.describe(); + output.push_str(text); + if i < seps.len() - 1 { + output.push('|'); + } + } + output.push_str("> "); + } + + ArgSepSyntax::End => (), + }; + } +} + +/// Syntax specification for a non-repeated argument. +/// +/// Every item in this enum is composed of a struct that provides the details on the parameter and +/// a struct that provides the details on how this parameter is separated from the next. +#[derive(Clone, Debug, PartialEq)] +pub enum SingularArgSyntax { + /// A required scalar value with the syntax details and the separator that follows. + RequiredValue(RequiredValueSyntax, ArgSepSyntax), + + /// A required reference with the syntax details and the separator that follows. + RequiredRef(RequiredRefSyntax, ArgSepSyntax), + + /// An optional scalar value with the syntax details and the separator that follows. + OptionalValue(OptionalValueSyntax, ArgSepSyntax), + + /// A required scalar value of any type with the syntax details and the separator that follows. + AnyValue(AnyValueSyntax, ArgSepSyntax), +} + +/// Complete syntax specification for a callable's arguments. +/// +/// Note that the description of function arguments is more restricted than that of commands. +/// The arguments compiler panics when these preconditions aren't met with the rationale that +/// builtin functions must never be ill-defined. +// TODO(jmmv): It might be nice to try to express these restrictions in the type system, but +// things are already too verbose as they are... +#[derive(Clone, Debug, PartialEq)] +pub(crate) struct CallableSyntax { + /// Ordered list of singular arguments that appear before repeated arguments. + pub(crate) singular: Cow<'static, [SingularArgSyntax]>, + + /// Details on the repeated argument allowed after singular arguments, if any. + pub(crate) repeated: Option>, +} + +impl CallableSyntax { + /// Creates a new callable arguments definition from its parts defined statically in the + /// code. + pub(crate) fn new_static( + singular: &'static [SingularArgSyntax], + repeated: Option<&'static RepeatedSyntax>, + ) -> Self { + Self { singular: Cow::Borrowed(singular), repeated: repeated.map(Cow::Borrowed) } + } + + /// Creates a new callable arguments definition from its parts defined dynamically at + /// runtime. + pub(crate) fn new_dynamic( + singular: Vec, + repeated: Option, + ) -> Self { + Self { singular: Cow::Owned(singular), repeated: repeated.map(Cow::Owned) } + } + + /// Computes the range of the expected number of parameters for this syntax. + pub(crate) fn expected_nargs(&self) -> RangeInclusive { + let mut min = 0; + let mut max = 0; + + for syn in self.singular.iter() { + let may_be_missing = match syn { + SingularArgSyntax::RequiredValue(..) => false, + SingularArgSyntax::RequiredRef(..) => false, + SingularArgSyntax::OptionalValue(..) => true, + SingularArgSyntax::AnyValue(details, ..) => details.allow_missing, + }; + if !may_be_missing { + min += 1; + } + max += 1; + } + + if let Some(syn) = self.repeated.as_ref() { + if syn.require_one { + min += 1; + } + max = usize::MAX; + } + + min..=max + } + + /// Returns true if this syntax represents "no arguments". + pub(crate) fn is_empty(&self) -> bool { + self.singular.is_empty() && self.repeated.is_none() + } + + /// Produces a user-friendly description of this callable syntax. + pub(crate) fn describe(&self) -> String { + let mut description = String::new(); + let mut last_singular_sep = None; + for (i, s) in self.singular.iter().enumerate() { + let sep = match s { + SingularArgSyntax::RequiredValue(details, sep) => { + description.push_str(&details.name); + description.push(details.vtype.annotation()); + sep + } + + SingularArgSyntax::RequiredRef(details, sep) => { + description.push_str(&details.name); + sep + } + + SingularArgSyntax::OptionalValue(details, sep) => { + description.push('['); + description.push_str(&details.name); + description.push(details.vtype.annotation()); + description.push(']'); + sep + } + + SingularArgSyntax::AnyValue(details, sep) => { + if details.allow_missing { + description.push('['); + } + description.push_str(&details.name); + if details.allow_missing { + description.push(']'); + } + sep + } + }; + + if self.repeated.is_none() || i < self.singular.len() - 1 { + sep.describe(&mut description); + } + if i == self.singular.len() - 1 { + last_singular_sep = Some(sep); + } + } + + if let Some(syn) = &self.repeated { + syn.describe(&mut description, last_singular_sep); + } + + description + } +} + +/// Builder pattern for constructing a callable's metadata. +pub struct CallableMetadataBuilder { + /// Name of the callable, stored in uppercase. + name: Cow<'static, str>, + + /// Return type of the callable, or `None` for commands/subroutines. + return_type: Option, + + /// Category for grouping related callables in help messages. + category: Option<&'static str>, + + /// Syntax specifications for the callable's arguments. + syntaxes: Vec, + + /// Description of the callable for documentation purposes. + description: Option<&'static str>, +} + +impl CallableMetadataBuilder { + /// Constructs a new metadata builder with the minimum information necessary. + /// + /// All code except tests must populate the whole builder with details. This is enforced at + /// construction time, where we only allow some fields to be missing under the test + /// configuration. + pub fn new(name: &'static str) -> Self { + assert!(name == name.to_ascii_uppercase(), "Callable name must be in uppercase"); + + Self { + name: Cow::Borrowed(name), + return_type: None, + syntaxes: vec![], + category: None, + description: None, + } + } + + /// Constructs a new metadata builder with the minimum information necessary. + /// + /// This is the same as `new` but using a dynamically-allocated name, which is necessary for + /// user-defined symbols. + pub fn new_dynamic>(name: S) -> Self { + Self { + name: Cow::Owned(name.into().to_ascii_uppercase()), + return_type: None, + syntaxes: vec![], + category: Some("User defined"), + description: Some("User defined symbol."), + } + } + + /// Sets the return type of the callable. + pub fn with_return_type(mut self, return_type: ExprType) -> Self { + self.return_type = Some(return_type); + self + } + + /// Sets the syntax specifications for this callable. + pub fn with_syntax( + mut self, + syntaxes: &'static [(&'static [SingularArgSyntax], Option<&'static RepeatedSyntax>)], + ) -> Self { + self.syntaxes = syntaxes + .iter() + .map(|s| CallableSyntax::new_static(s.0, s.1)) + .collect::>(); + self + } + + /// Sets the syntax specifications for this callable. + pub(crate) fn with_syntaxes>>(mut self, syntaxes: S) -> Self { + self.syntaxes = syntaxes.into(); + self + } + + /// Sets the syntax specifications for this callable. + pub(crate) fn with_dynamic_syntax( + self, + syntaxes: Vec<(Vec, Option)>, + ) -> Self { + let syntaxes = syntaxes + .into_iter() + .map(|s| CallableSyntax::new_dynamic(s.0, s.1)) + .collect::>(); + self.with_syntaxes(syntaxes) + } + + /// Sets the category for this callable. All callables with the same category name will be + /// grouped together in help messages. + pub fn with_category(mut self, category: &'static str) -> Self { + self.category = Some(category); + self + } + + /// Sets the description for this callable. The `description` is a collection of paragraphs + /// separated by a single newline character, where the first paragraph is taken as the summary + /// of the description. The summary must be a short sentence that is descriptive enough to be + /// understood without further details. Empty lines (paragraphs) are not allowed. + pub fn with_description(mut self, description: &'static str) -> Self { + for l in description.lines() { + assert!(!l.is_empty(), "Description cannot contain empty lines"); + } + self.description = Some(description); + self + } + + /// Generates the final `CallableMetadata` object, ensuring all values are present. + pub fn build(self) -> Rc { + assert!(!self.syntaxes.is_empty(), "All callables must specify a syntax"); + Rc::from(CallableMetadata { + name: self.name, + return_type: self.return_type, + syntaxes: self.syntaxes, + category: self.category.expect("All callables must specify a category"), + description: self.description.expect("All callables must specify a description"), + }) + } + + /// Generates the final `CallableMetadata` object, ensuring the minimal set of values are + /// present. Only useful for testing. + pub fn test_build(mut self) -> Rc { + if self.syntaxes.is_empty() { + self.syntaxes.push(CallableSyntax::new_static(&[], None)); + } + Rc::from(CallableMetadata { + name: self.name, + return_type: self.return_type, + syntaxes: self.syntaxes, + category: self.category.unwrap_or(""), + description: self.description.unwrap_or(""), + }) + } +} + +/// Representation of a callable's metadata. +/// +/// The callable is expected to hold onto an instance of this object within its struct to make +/// queries fast. +#[derive(Clone, Debug, PartialEq)] +pub struct CallableMetadata { + /// Name of the callable, stored in uppercase. + name: Cow<'static, str>, + + /// Return type of the callable, or `None` for commands/subroutines. + return_type: Option, + + /// Syntax specifications for the callable's arguments. + syntaxes: Vec, + + /// Category for grouping related callables in help messages. + category: &'static str, + + /// Description of the callable for documentation purposes. + description: &'static str, +} + +impl CallableMetadata { + /// Gets the callable's name, all in uppercase. + pub fn name(&self) -> &str { + &self.name + } + + /// Gets the callable's return type. + pub(crate) fn return_type(&self) -> Option { + self.return_type + } + + /// Gets the callable's syntax specification. + pub(crate) fn syntax(&self) -> String { + fn format_one(cs: &CallableSyntax) -> String { + let mut syntax = cs.describe(); + if syntax.is_empty() { + syntax.push_str("no arguments"); + } + syntax + } + + match self.syntaxes.as_slice() { + [] => panic!("Callables without syntaxes are not allowed at construction time"), + [one] => format_one(one), + many => many + .iter() + .map(|syn| format!("<{}>", syn.describe())) + .collect::>() + .join(" | "), + } + } + + /// Returns true if `sep` is valid for a function call (only `Long` and `End` are allowed because + /// the parser only produces comma separators for function arguments). + fn is_function_sep(sep: &ArgSepSyntax) -> bool { + match sep { + ArgSepSyntax::Exactly(ArgSep::Long) | ArgSepSyntax::End => true, + ArgSepSyntax::OneOf(seps) => seps.iter().all(|s| *s == ArgSep::Long), + _ => false, + } + } + + /// Checks that the syntax of a callable that returns a value only uses separators that can appear + /// in a function call (i.e. the comma separator). The parser only produces `ArgSep::Long` for + /// function arguments, so any other separator in the metadata would be dead/untestable. + fn debug_assert_function_seps(&self, syntax: &CallableSyntax) { + if self.return_type().is_none() { + return; + } + for syn in syntax.singular.iter() { + let sep = match syn { + SingularArgSyntax::RequiredValue(_, sep) => sep, + SingularArgSyntax::RequiredRef(_, sep) => sep, + SingularArgSyntax::OptionalValue(_, sep) => sep, + SingularArgSyntax::AnyValue(_, sep) => sep, + }; + debug_assert!( + Self::is_function_sep(sep), + "Function {} has a non-comma separator in its singular args syntax", + self.name() + ); + } + if let Some(repeated) = syntax.repeated.as_ref() { + debug_assert!( + Self::is_function_sep(&repeated.sep), + "Function {} has a non-comma separator in its repeated args syntax", + self.name() + ); + } + } + + /// Finds the syntax definition that matches the given argument count. + /// + /// Returns an error if no syntax matches, and panics if multiple syntaxes match (which would + /// indicate an ambiguous callable definition). + pub(crate) fn find_syntax(&self, nargs: usize) -> Option<&CallableSyntax> { + let mut matches = self.syntaxes.iter().filter(|s| s.expected_nargs().contains(&nargs)); + let syntax = matches.next(); + match syntax { + Some(syntax) => { + //debug_assert!(matches.next().is_none(), "Ambiguous syntax definitions"); + if cfg!(debug_assertions) { + self.debug_assert_function_seps(syntax); + } + Some(syntax) + } + None => None, + } + } + + /// Gets the callable's category as a collection of lines. The first line is the title of the + /// category, and any extra lines are additional information for it. + #[allow(unused)] + pub(crate) fn category(&self) -> &'static str { + self.category + } + + /// Gets the callable's textual description as a collection of lines. The first line is the + /// summary of the callable's purpose. + #[allow(unused)] + pub(crate) fn description(&self) -> Lines<'static> { + self.description.lines() + } + + /// Returns true if this is a callable that takes no arguments. + #[allow(unused)] + pub(crate) fn is_argless(&self) -> bool { + self.syntaxes.is_empty() || (self.syntaxes.len() == 1 && self.syntaxes[0].is_empty()) + } + + /// Returns true if this callable is a function (not a command). + #[allow(unused)] + pub(crate) fn is_function(&self) -> bool { + self.return_type.is_some() + } + + /// Returns true if this callable is user-defined. + pub(crate) fn is_user_defined(&self) -> bool { + self.category == "User defined" + } +} + +/// Reads a boolean from the register at `index`, asserting that `vtype` is `Boolean`. +fn deref_boolean(regs: &[u64], index: usize, vtype: ExprType) -> bool { + assert_eq!(ExprType::Boolean, vtype); + regs[index] != 0 +} + +/// Reads a double from the register at `index`, asserting that `vtype` is `Double`. +fn deref_double(regs: &[u64], index: usize, vtype: ExprType) -> f64 { + assert_eq!(ExprType::Double, vtype); + f64::from_bits(regs[index]) +} + +/// Reads an integer from the register at `index`, asserting that `vtype` is `Integer`. +fn deref_integer(regs: &[u64], index: usize, vtype: ExprType) -> i32 { + assert_eq!(ExprType::Integer, vtype); + regs[index] as i32 +} + +/// Reads a string from the register at `index`, asserting that `vtype` is `Text`. +fn deref_string<'a>( + regs: &[u64], + index: usize, + vtype: ExprType, + constants: &'a [ConstantDatum], + heap: &'a [HeapDatum], +) -> &'a str { + assert_eq!(ExprType::Text, vtype); + let ptr = DatumPtr::from(regs[index]); + ptr.resolve_string(constants, heap) +} + +/// An immutable reference to a variable (register) in the register file, carrying +/// its type for runtime validation of dereference operations. +pub struct RegisterRef<'a, 'vm> { + /// The scope through which to access the register. + scope: &'a Scope<'vm>, + + /// The absolute index of the register. + index: usize, + + /// The type of the value pointed to. + pub vtype: ExprType, +} + +impl<'a, 'vm> RegisterRef<'a, 'vm> { + /// Dereferences this register reference as a boolean. + pub fn deref_boolean(&self) -> bool { + deref_boolean(self.scope.regs, self.index, self.vtype) + } + + /// Dereferences this register reference as a double. + pub fn deref_double(&self) -> f64 { + deref_double(self.scope.regs, self.index, self.vtype) + } + + /// Dereferences this register reference as an integer. + pub fn deref_integer(&self) -> i32 { + deref_integer(self.scope.regs, self.index, self.vtype) + } + + /// Dereferences this register reference as a string. + pub fn deref_string(&self) -> &str { + deref_string(self.scope.regs, self.index, self.vtype, self.scope.constants, self.scope.heap) + } +} + +impl<'a, 'vm> fmt::Display for RegisterRef<'a, 'vm> { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "&[R{}]{}", self.index, self.vtype) + } +} + +/// A mutable reference to a variable (register) in the register file, carrying +/// its type for runtime validation of dereference and set operations. +pub struct RegisterRefMut<'a, 'vm> { + /// The scope through which to access the register. + scope: &'a mut Scope<'vm>, + + /// The absolute index of the register. + index: usize, + + /// The type of the value pointed to. + pub vtype: ExprType, +} + +impl<'a, 'vm> RegisterRefMut<'a, 'vm> { + /// Dereferences this register reference as a boolean. + pub fn deref_boolean(&self) -> bool { + deref_boolean(self.scope.regs, self.index, self.vtype) + } + + /// Dereferences this register reference as a double. + pub fn deref_double(&self) -> f64 { + deref_double(self.scope.regs, self.index, self.vtype) + } + + /// Dereferences this register reference as an integer. + pub fn deref_integer(&self) -> i32 { + deref_integer(self.scope.regs, self.index, self.vtype) + } + + /// Dereferences this register reference as a string. + pub fn deref_string(&self) -> &str { + deref_string(self.scope.regs, self.index, self.vtype, self.scope.constants, self.scope.heap) + } + + /// Sets a boolean via this register reference. + pub fn set_boolean(&mut self, b: bool) { + assert_eq!(ExprType::Boolean, self.vtype); + self.scope.regs[self.index] = if b { 1 } else { 0 }; + } + + /// Sets a double via this register reference. + pub fn set_double(&mut self, d: f64) { + assert_eq!(ExprType::Double, self.vtype); + self.scope.regs[self.index] = d.to_bits(); + } + + /// Sets an integer via this register reference. + pub fn set_integer(&mut self, i: i32) { + assert_eq!(ExprType::Integer, self.vtype); + self.scope.regs[self.index] = i as u64; + } + + /// Sets a string via this register reference. + pub fn set_string>(&mut self, s: S) { + assert_eq!(ExprType::Text, self.vtype); + let index = self.scope.heap.len(); + self.scope.heap.push(HeapDatum::Text(s.into())); + self.scope.regs[self.index] = DatumPtr::for_heap(unchecked_usize_as_u32(index)); + } +} + +impl<'a, 'vm> fmt::Display for RegisterRefMut<'a, 'vm> { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "&[R{}]{}", self.index, self.vtype) + } +} + +/// Arguments provided to a callable during its execution. +pub struct Scope<'a> { + /// Slice of register values containing the callable's arguments. + pub(crate) regs: &'a mut [u64], + + /// Reference to the constants pool for resolving constant pointers. + pub(crate) constants: &'a [ConstantDatum], + + /// Reference to the heap for resolving heap pointers. + pub(crate) heap: &'a mut Vec, + + /// Start of the current frame (where the arguments to the upcall start). + pub(crate) fp: usize, + + /// Source locations of the call arguments, one per register slot in the argument area. + /// + /// Indexed in the same order as the argument registers: `arg_linecols[N]` is the source + /// position of the expression that was compiled into register slot `N`. May be shorter + /// than the actual argument register count if debug information is unavailable. + pub(crate) arg_linecols: &'a [LineCol], + + /// Last error raised in the VM, if any. + pub(crate) last_error: &'a Option, + + /// `DATA` values captured from the compiled source. + pub(crate) data: &'a [Option], +} + +impl<'a> Scope<'a> { + /// Returns `DATA` values captured from the compiled source in encounter order. + pub fn data(&self) -> &[Option] { + self.data + } + + /// Returns the source position of the argument at `arg`, or `None` if unavailable. + /// + /// `arg` is the register-slot index of the argument, matching the `N` in `scope.get_*(N)`. + pub fn get_pos(&self, arg: u8) -> LineCol { + self.arg_linecols[usize::from(arg)] + } + + /// Gets the type tag of the argument at `arg`. + pub fn get_type(&self, arg: u8) -> VarArgTag { + VarArgTag::parse_u64(self.regs[self.fp + (arg as usize)]).unwrap() + } + + /// Gets the boolean value of the argument at `arg`. + pub fn get_boolean(&self, arg: u8) -> bool { + self.regs[self.fp + (arg as usize)] != 0 + } + + /// Gets the double value of the argument at `arg`. + pub fn get_double(&self, arg: u8) -> f64 { + f64::from_bits(self.regs[self.fp + (arg as usize)]) + } + + /// Gets the integer value of the argument at `arg`. + pub fn get_integer(&self, arg: u8) -> i32 { + self.regs[self.fp + (arg as usize)] as i32 + } + + /// Gets an immutable register reference from the argument at `arg`. + pub fn get_ref(&self, arg: u8) -> RegisterRef<'_, 'a> { + let tagged_ptr = self.regs[self.fp + (arg as usize)]; + let (index, vtype) = TaggedRegisterRef::from_u64(tagged_ptr).parse(); + RegisterRef { scope: self, index, vtype } + } + + /// Gets a mutable register reference from the argument at `arg`. + pub fn get_mut_ref(&mut self, arg: u8) -> RegisterRefMut<'_, 'a> { + let tagged_ptr = self.regs[self.fp + (arg as usize)]; + let (index, vtype) = TaggedRegisterRef::from_u64(tagged_ptr).parse(); + RegisterRefMut { scope: self, index, vtype } + } + + /// Gets the string value of the argument at `arg`. + pub fn get_string(&self, arg: u8) -> &str { + let index = self.regs[self.fp + (arg as usize)]; + let ptr = DatumPtr::from(index); + ptr.resolve_string(self.constants, self.heap) + } + + /// Returns the last error stored in the VM, if any. + pub fn last_error(&self) -> Option<&str> { + self.last_error.as_deref() + } + + /// Returns the number of input arguments (not registers) in the scope. + pub fn nargs(&self) -> usize { + self.arg_linecols.len() + } + + /// Sets the return value of the function to `b`. + pub fn return_boolean(self, b: bool) { + self.regs[self.fp] = if b { 1 } else { 0 }; + } + + /// Sets the return value of the function to `d`. + pub fn return_double(self, d: f64) { + self.regs[self.fp] = d.to_bits(); + } + + /// Sets the return value of the function to `i`. + pub fn return_integer(self, i: i32) { + self.regs[self.fp] = i as u64; + } + + /// Sets the return value of the function to `s`. + pub fn return_string>(self, s: S) { + let index = self.heap.len(); + self.heap.push(HeapDatum::Text(s.into())); + self.regs[self.fp] = DatumPtr::for_heap(unchecked_usize_as_u32(index)); + } +} + +/// A trait to define a callable that is executed by a `Machine`. +/// +/// The callable themselves are immutable but they can reference mutable state. Given that +/// EndBASIC is not threaded, it is sufficient for those references to be behind a `RefCell` +/// and/or an `Rc`. +/// +/// Idiomatically, these objects need to provide a `new()` method that returns an `Rc`, as +/// that's the type used throughout the execution engine. +#[async_trait(?Send)] +pub trait Callable { + /// Returns the metadata for this function. + /// + /// The return value takes the form of a reference to force the callable to store the metadata + /// as a struct field so that calls to this function are guaranteed to be cheap. + fn metadata(&self) -> Rc; + + /// Executes the function. + /// + /// `args` contains the arguments to the function call. + /// + /// `machine` provides mutable access to the current state of the machine invoking the function. + async fn exec(&self, scope: Scope<'_>) -> CallResult<()>; +} diff --git a/core2/src/compiler/args.rs b/core2/src/compiler/args.rs new file mode 100644 index 00000000..d5bd573c --- /dev/null +++ b/core2/src/compiler/args.rs @@ -0,0 +1,462 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Common compilers for callable arguments. + +use super::SymbolKey; +use super::syms::LocalSymtable; +use crate::ast::{ArgSpan, CallSpan, Expr, VarRef}; +use crate::bytecode::{self, Register}; +use crate::callable::CallableMetadata; +use crate::compiler::codegen::Codegen; +use crate::compiler::exprs::{compile_expr, compile_expr_as_type}; +use crate::compiler::syms::{self, SymbolPrototype, TempSymtable}; +use crate::compiler::{Error, Result}; +use crate::reader::LineCol; +use crate::{ArgSep, ArgSepSyntax, ExprType, RepeatedTypeSyntax, SingularArgSyntax}; +use std::rc::Rc; + +/// Compiles an argument separator with any necessary tagging. +/// +/// `instrs` is the list of instructions into which insert the separator tag at `sep_tag_pc` +/// when it is needed to disambiguate separators at runtime. +/// +/// `syn` contains the details about the separator syntax that is accepted. +/// +/// `is_last` indicates whether this is the last separator in the command call and is used +/// only for diagnostics purposes. +/// +/// `sep` and `sep_pos` are the details about the separator being compiled. +#[allow(clippy::too_many_arguments)] +fn validate_syn_argsep( + md: &Rc, + syn: &ArgSepSyntax, + is_last: bool, + sep: ArgSep, + sep_pos: LineCol, +) -> Result<()> { + debug_assert!( + (!is_last || sep == ArgSep::End) && (is_last || sep != ArgSep::End), + "Parser can only supply an End separator in the last argument" + ); + + match syn { + ArgSepSyntax::Exactly(exp_sep) => { + debug_assert!(*exp_sep != ArgSep::End, "Use ArgSepSyntax::End"); + if sep != ArgSep::End && sep != *exp_sep { + return Err(Error::CallableSyntax(sep_pos, md.as_ref().clone())); + } + Ok(()) + } + + ArgSepSyntax::OneOf(exp_seps) => { + if sep == ArgSep::End { + return Ok(()); + } + + let mut found = false; + for exp_sep in *exp_seps { + debug_assert!(*exp_sep != ArgSep::End, "Use ArgSepSyntax::End"); + if sep == *exp_sep { + found = true; + break; + } + } + if !found { + return Err(Error::CallableSyntax(sep_pos, md.as_ref().clone())); + } + Ok(()) + } + + ArgSepSyntax::End => { + debug_assert!(is_last); + Ok(()) + } + } +} + +/// Pre-allocates one local variable for a command output argument, setting its to its default +/// value. +fn define_new_arg( + symtable: &mut LocalSymtable<'_>, + vref: &VarRef, + pos: LineCol, + codegen: &mut Codegen, +) -> Result<()> { + let key = SymbolKey::from(&vref.name); + let vtype = vref.ref_type.unwrap_or(ExprType::Integer); + let reg = symtable + .put_local(key, SymbolPrototype::Scalar(vtype)) + .map_err(|e| Error::from_syms(e, pos))?; + codegen.emit_default(reg, vtype, pos); + Ok(()) +} + +/// Pre-allocates local variables for command output arguments. +pub(super) fn define_new_args( + span: &CallSpan, + md: &Rc, + symtable: &mut LocalSymtable<'_>, + codegen: &mut Codegen, +) -> Result<()> { + let Some(syntax) = md.find_syntax(span.args.len()) else { + return Err(Error::CallableSyntax(span.vref_pos, md.as_ref().clone())); + }; + + let mut arg_iter = span.args.iter(); + + for syn in syntax.singular.iter() { + match syn { + SingularArgSyntax::RequiredValue(_details, _exp_sep) => { + arg_iter.next().expect("Args and their syntax must advance in unison"); + } + + SingularArgSyntax::RequiredRef(details, _exp_sep) => { + let ArgSpan { expr, .. } = + arg_iter.next().expect("Args and their syntax must advance in unison"); + + if let Some(Expr::Symbol(span)) = expr + && let Err(syms::Error::UndefinedSymbol(..)) = + symtable.get_local_or_global(&span.vref) + && details.define_undefined + { + define_new_arg(symtable, &span.vref, span.pos, codegen)?; + } + } + + SingularArgSyntax::OptionalValue(_details, _exp_sep) => { + arg_iter.next(); + } + + SingularArgSyntax::AnyValue(_details, _exp_sep) => { + arg_iter.next(); + } + }; + } + + if let Some(syn) = syntax.repeated.as_ref() + && let RepeatedTypeSyntax::VariableRef = syn.type_syn + { + for arg in arg_iter { + let Some(Expr::Symbol(span)) = &arg.expr else { + continue; + }; + + let Err(syms::Error::UndefinedSymbol(..)) = symtable.get_local_or_global(&span.vref) + else { + continue; + }; + + define_new_arg(symtable, &span.vref, span.pos, codegen)?; + } + } + + Ok(()) +} + +/// Compiles the arguments of a callable invocation. +/// +/// Returns the first register containing the compiled arguments. Arguments are laid out as +/// pairs of type tag and value registers, allowing the callable to interpret them at runtime. +/// +/// The caller *must* invoke `define_new_args` beforehand when compiling arguments for commands. +/// This separate function is necessary to pre-allocate local variables for any output arguments. +/// +/// TODO(jmmv): The `md` metadata is passed by value, not because we want to, but because it's +/// necessary to appease the borrow checker. The `md` is obtained from the `symtable` in the caller +/// (as a reference) to perform various validations so it is not possible to pass it as input along +/// `symtable`. An alternative would be to take the symbol `key` as a parameter here and perform +/// another lookup from the symtable. Or maybe we could make `Metadata` objects static by +/// eliminating the `MetadataBuilder` and pass a static reference here. +pub(super) fn compile_args( + span: CallSpan, + md: Rc, + symtable: &mut TempSymtable<'_, '_>, + codegen: &mut Codegen, +) -> Result<(Register, Vec)> { + let key_pos = span.vref_pos; + + let Some(syntax) = md.find_syntax(span.args.len()) else { + return Err(Error::CallableSyntax(key_pos, md.as_ref().clone())); + }; + + let mut scope = symtable.temp_scope(); + + // Collects the source position for each register slot allocated below, in allocation order. + // This is used to populate the UPCALL instruction's arg_linecols metadata so that callables + // can query the source position of any argument via `Scope::get_pos`. + let mut arg_linecols: Vec = Vec::new(); + + let input_nargs = span.args.len(); + let mut arg_iter = span.args.into_iter().peekable(); + + for syn in syntax.singular.iter() { + match syn { + SingularArgSyntax::RequiredValue(details, exp_sep) => { + let ArgSpan { expr, sep, sep_pos } = + arg_iter.next().expect("Args and their syntax must advance in unison"); + let arg_pos = expr.as_ref().map(|e| e.start_pos()).unwrap_or(sep_pos); + + match expr { + None => return Err(Error::CallableSyntax(key_pos, md.as_ref().clone())), + Some(expr) => { + let temp_value = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + compile_expr_as_type(codegen, symtable, temp_value, expr, details.vtype)?; + validate_syn_argsep(&md, exp_sep, arg_iter.peek().is_none(), sep, sep_pos)?; + } + } + } + + SingularArgSyntax::RequiredRef(details, exp_sep) => { + let ArgSpan { expr, sep, sep_pos } = + arg_iter.next().expect("Args and their syntax must advance in unison"); + let arg_pos = expr.as_ref().map(|e| e.start_pos()).unwrap_or(sep_pos); + + match expr { + None => return Err(Error::CallableSyntax(key_pos, md.as_ref().clone())), + Some(Expr::Symbol(span)) => { + let (reg, vtype) = match symtable.get_local_or_global(&span.vref) { + Ok((reg, SymbolPrototype::Scalar(vtype))) => (reg, vtype), + Ok((_, SymbolPrototype::Array(_))) => { + return Err(Error::CallableSyntax(span.pos, md.as_ref().clone())); + } + Err(e @ syms::Error::UndefinedSymbol(..)) => { + if !details.define_undefined { + return Err(Error::from_syms(e, span.pos)); + } + unreachable!("Caller must use define_new_args first for commands"); + } + Err(e) => return Err(Error::from_syms(e, span.pos)), + }; + let temp = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + codegen.emit(bytecode::make_load_register_ptr(temp, vtype, reg), arg_pos); + validate_syn_argsep(&md, exp_sep, arg_iter.peek().is_none(), sep, sep_pos)?; + } + Some(expr) => { + return Err(Error::CallableSyntax(expr.start_pos(), md.as_ref().clone())); + } + } + } + + SingularArgSyntax::OptionalValue(details, exp_sep) => { + // The `CallSpan` is optimized (for simplicity) to not carry any arguments at all + // when callables are invoked without arguments. This leads to a little + // inconsistency though: a call like `PRINT ;` carries two arguments whereas + // `PRINT` carries none (instead of one). Deal with this here. + let (expr, sep, sep_pos) = match arg_iter.next() { + Some(ArgSpan { expr, sep, sep_pos }) => (expr, sep, sep_pos), + None => (None, ArgSep::End, key_pos), + }; + let arg_pos = expr.as_ref().map(|e| e.start_pos()).unwrap_or(sep_pos); + + let temp_tag = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + let tag = match expr { + None => bytecode::VarArgTag::Missing(sep), + Some(expr) => { + let temp_value = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + compile_expr_as_type(codegen, symtable, temp_value, expr, details.vtype)?; + bytecode::VarArgTag::Immediate(sep, details.vtype) + } + }; + validate_syn_argsep(&md, exp_sep, arg_iter.peek().is_none(), sep, sep_pos)?; + codegen.emit(bytecode::make_load_integer(temp_tag, tag.make_u16()), arg_pos); + } + + SingularArgSyntax::AnyValue(details, exp_sep) => { + // The `CallSpan` is optimized (for simplicity) to not carry any arguments at all + // when callables are invoked without arguments. This leads to a little + // inconsistency though: a call like `PRINT ;` carries two arguments whereas + // `PRINT` carries none (instead of one). Deal with this here. + let (expr, sep, sep_pos) = match arg_iter.next() { + Some(ArgSpan { expr, sep, sep_pos }) => (expr, sep, sep_pos), + None => { + if !details.allow_missing { + return Err(Error::CallableSyntax(key_pos, md.as_ref().clone())); + } + (None, ArgSep::End, key_pos) + } + }; + let arg_pos = expr.as_ref().map(|e| e.start_pos()).unwrap_or(sep_pos); + + let temp_tag = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + let tag = match expr { + None => bytecode::VarArgTag::Missing(sep), + Some(expr) => { + let temp_value = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + let etype = compile_expr(codegen, symtable, temp_value, expr)?; + bytecode::VarArgTag::Immediate(sep, etype) + } + }; + validate_syn_argsep(&md, exp_sep, arg_iter.peek().is_none(), sep, sep_pos)?; + codegen.emit(bytecode::make_load_integer(temp_tag, tag.make_u16()), arg_pos); + } + }; + } + + // Variable (repeated) arguments are represented as 1 or 2 consecutive registers. + // + // The first register always contains a `VarArgTag`, which indicates the type of + // separator following the argument and, if an argument is present, its type. + // The second register is only present if there is an argument. + // + // The caller must iterate over all tags until it finds `ArgSep::End`. + if let Some(syn) = syntax.repeated.as_ref() { + let mut min_nargs = syntax.singular.len(); + if syn.require_one { + min_nargs += 1; + } + if input_nargs < min_nargs { + return Err(Error::CallableSyntax(key_pos, md.as_ref().clone())); + } + + if arg_iter.peek().is_none() { + let temp_tag = scope.alloc().map_err(|e| Error::from_syms(e, key_pos))?; + arg_linecols.push(key_pos); + let tag = bytecode::VarArgTag::Missing(ArgSep::End); + codegen.emit(bytecode::make_load_integer(temp_tag, tag.make_u16()), key_pos); + } + + while arg_iter.peek().is_some() { + let ArgSpan { expr, sep, sep_pos } = + arg_iter.next().expect("Args and their syntax must advance in unison"); + + let arg_pos = expr.as_ref().map(|e| e.start_pos()).unwrap_or(sep_pos); + let temp_tag = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + validate_syn_argsep(&md, &syn.sep, arg_iter.peek().is_none(), sep, sep_pos)?; + + let tag = match expr { + None => { + if !syn.allow_missing { + return Err(Error::CallableSyntax(arg_pos, md.as_ref().clone())); + } + bytecode::VarArgTag::Missing(sep) + } + + Some(expr) => match syn.type_syn { + RepeatedTypeSyntax::AnyValue => { + let temp_value = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + let etype = compile_expr(codegen, symtable, temp_value, expr)?; + bytecode::VarArgTag::Immediate(sep, etype) + } + + RepeatedTypeSyntax::TypedValue(vtype) => { + let temp_value = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + compile_expr_as_type(codegen, symtable, temp_value, expr, vtype)?; + bytecode::VarArgTag::Immediate(sep, vtype) + } + + RepeatedTypeSyntax::VariableRef => { + let Expr::Symbol(span) = expr else { + return Err(Error::CallableSyntax(arg_pos, md.as_ref().clone())); + }; + + let (reg, vtype) = match symtable.get_local_or_global(&span.vref) { + Ok((reg, SymbolPrototype::Scalar(vtype))) => (reg, vtype), + Ok((_, SymbolPrototype::Array(_))) => { + return Err(Error::CallableSyntax(arg_pos, md.as_ref().clone())); + } + Err(syms::Error::UndefinedSymbol(..)) => { + unreachable!("Caller must use define_new_args first for commands"); + } + Err(e) => return Err(Error::from_syms(e, span.pos)), + }; + let temp = scope.alloc().map_err(|e| Error::from_syms(e, arg_pos))?; + arg_linecols.push(arg_pos); + codegen.emit(bytecode::make_load_register_ptr(temp, vtype, reg), arg_pos); + bytecode::VarArgTag::Pointer(sep) + } + }, + }; + codegen.emit(bytecode::make_load_integer(temp_tag, tag.make_u16()), arg_pos); + } + } + + if arg_iter.peek().is_some() { + debug_assert!(arg_iter.next().is_some(), "Args and their syntax must advance in unison"); + return Err(Error::CallableSyntax(key_pos, md.as_ref().clone())); + } + + let first_reg = scope.first().map_err(|e| Error::from_syms(e, key_pos))?; + Ok((first_reg, arg_linecols)) +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::CallableMetadataBuilder; + use crate::callable::RepeatedSyntax; + use crate::compiler::syms::GlobalSymtable; + use std::borrow::Cow; + use std::collections::HashMap; + + #[test] + fn test_compile_args_materializes_missing_repeated_tag() -> Result<()> { + let pos = LineCol { line: 1, col: 1 }; + let md = CallableMetadataBuilder::new("OUT") + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::AnyValue, + sep: ArgSepSyntax::Exactly(ArgSep::Short), + require_one: false, + allow_missing: false, + }), + )]) + .test_build(); + + let mut codegen = Codegen::default(); + + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + let (first_reg, arg_linecols) = { + let mut symtable = local.frozen(); + compile_args( + CallSpan { vref: VarRef::new("OUT", None), vref_pos: pos, args: vec![] }, + md, + &mut symtable, + &mut codegen, + )? + }; + assert_eq!(Register::local(0).unwrap(), first_reg); + assert_eq!(vec![pos], arg_linecols); + + let upcall = codegen.get_upcall(SymbolKey::from("OUT"), None, pos)?; + let addr = codegen.emit(bytecode::make_upcall(upcall, first_reg), pos); + codegen.set_arg_linecols(addr, arg_linecols); + codegen.emit(bytecode::make_eof(), LineCol { line: 0, col: 0 }); + + let image = codegen.build_image(HashMap::default(), vec![])?; + assert_eq!( + vec![ + "0000: LOADI R64, 0 ; 1:1".to_owned(), + "0001: UPCALL 0, R64 ; 1:1, OUT".to_owned(), + "0002: EOF ; 0:0".to_owned(), + ], + image.disasm() + ); + Ok(()) + } +} diff --git a/core2/src/compiler/codegen.rs b/core2/src/compiler/codegen.rs new file mode 100644 index 00000000..0fbf8b18 --- /dev/null +++ b/core2/src/compiler/codegen.rs @@ -0,0 +1,320 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Code generation for the EndBASIC compiler. + +use crate::ast::ExprType; +use crate::bytecode::{self, ErrorHandlerMode, Register}; +use crate::compiler::ids::HashMapWithIds; +use crate::compiler::{Error, Result, SymbolKey}; +use crate::image::{GlobalVarInfo, Image, ImageDelta, InstrMetadata}; +use crate::mem::ConstantDatum; +use crate::reader::LineCol; +use std::collections::HashMap; +use std::convert::TryFrom; + +/// Alias for instruction addresses in the generated code. +type Address = usize; + +/// Represents a fixup that needs to be applied to an instruction after all symbols have been +/// located. +#[derive(Clone)] +pub(super) enum Fixup { + /// Fixup to resolve a user-defined call target address into a `CALL` instruction. + Call(Register, SymbolKey), + + /// Fixup to resolve a label target address into a `GOSUB` instruction. + Gosub(String), + + /// Fixup to resolve a label target address into a `GOTO` (jump) instruction. + Goto(String), + + /// Fixup to resolve a label target address into a `SET_ERROR_HANDLER` instruction. + OnErrorGoto(String), +} + +/// The code generator. +#[derive(Clone, Default)] +pub(super) struct Codegen { + /// The instructions being generated. + code: Vec, + + /// The constants pool for the image being generated. + constants: HashMapWithIds, + + /// Collection of fixups to apply after code generation. + fixups: HashMap, + + /// Per-instruction metadata for every instruction in `code`. + instrs: Vec, + + /// Map of label names to their target addresses. + labels: HashMap, + + /// Map of user callable names to their target start and end addresses. + user_callables_addresses: HashMap, + + /// Map of built-in callable names to their return types and assigned upcall IDs. + upcalls: HashMapWithIds, u16>, +} + +impl Codegen { + /// Returns the address of the next instruction to be emitted. + pub(super) fn next_pc(&self) -> Address { + self.code.len() + } + + /// Appends a new instruction `op` generated at `pos` to the code and returns its address. + pub(super) fn emit(&mut self, op: u32, pos: LineCol) -> Address { + self.code.push(op); + self.instrs.push(InstrMetadata { + linecol: pos, + is_stmt_start: false, + arg_linecols: vec![], + }); + self.code.len() - 1 + } + + /// Marks the instruction at `addr` as the start of a statement. + pub(super) fn mark_statement_start(&mut self, addr: Address) { + self.instrs[addr].is_stmt_start = true; + } + + /// Attaches argument source locations to the instruction at `addr`. + /// + /// `arg_linecols` has one entry per register slot in the argument area, in the same order + /// that `compile_args` allocates them. This should be called after emitting a UPCALL or + /// CALL instruction. + pub(super) fn set_arg_linecols(&mut self, addr: Address, arg_linecols: Vec) { + self.instrs[addr].arg_linecols = arg_linecols; + } + + /// Removes the EOF instruction from the program, if any. + pub(super) fn pop_eof(&mut self) { + if let Some(instr) = self.code.pop() { + debug_assert_eq!(bytecode::make_eof(), instr); + self.instrs.pop(); + } + } + + /// Emits code to set `reg` to the default value for `vtype`. + pub(super) fn emit_default(&mut self, reg: Register, vtype: ExprType, pos: LineCol) { + let instr = match vtype { + ExprType::Boolean | ExprType::Double | ExprType::Integer => { + bytecode::make_load_integer(reg, 0) + } + ExprType::Text => bytecode::make_alloc(reg, ExprType::Text), + }; + self.emit(instr, pos); + } + + /// Emits code to set `reg` to the specific `datum` value. + pub(super) fn emit_value( + &mut self, + reg: Register, + datum: ConstantDatum, + pos: LineCol, + ) -> Result<()> { + match datum { + ConstantDatum::Boolean(b) => { + self.emit(bytecode::make_load_integer(reg, if b { 1 } else { 0 }), pos); + } + ConstantDatum::Integer(i) => { + if let Ok(v) = u16::try_from(i) { + self.emit(bytecode::make_load_integer(reg, v), pos); + } else { + let idx = self.get_constant(ConstantDatum::Integer(i), pos)?; + self.emit(bytecode::make_load_constant(reg, idx), pos); + } + } + ConstantDatum::Double(d) => { + let idx = self.get_constant(ConstantDatum::Double(d), pos)?; + self.emit(bytecode::make_load_constant(reg, idx), pos); + } + ConstantDatum::Text(s) => { + let idx = self.get_constant(ConstantDatum::Text(s), pos)?; + self.emit(bytecode::make_load_integer(reg, idx), pos); + } + } + Ok(()) + } + + /// Overwrites the instruction at `addr` with `op`. + /// + /// Used by the compiler to back-patch placeholder instructions with resolved jump targets. + pub(super) fn patch(&mut self, addr: Address, op: u32) { + self.code[addr] = op; + } + + /// Records a `fixup` that needs to be applied at `addr`. + pub(super) fn add_fixup(&mut self, addr: usize, fixup: Fixup) { + let previous = self.fixups.insert(addr, fixup); + debug_assert!(previous.is_none(), "Cannot handle more than one fixup per address"); + } + + /// Gets the ID of a `constant`, adding it to the constants table if it isn't yet there. + pub(super) fn get_constant(&mut self, constant: ConstantDatum, pos: LineCol) -> Result { + match self.constants.get(&constant) { + Some((_etype, id)) => Ok(id), + None => { + let etype = constant.etype(); + match self.constants.insert(constant, etype) { + Some((_etype, id)) => Ok(id), + None => Err(Error::OutOfConstants(pos)), + } + } + } + } + + /// Records the location of a user-defined callable. + pub(super) fn define_user_callable(&mut self, key: SymbolKey, start: Address, end: Address) { + self.user_callables_addresses.insert(key, (start, end)); + } + + /// Records the location of a label. Returns false on failure (if the label already existed). + pub(super) fn define_label(&mut self, key: SymbolKey, address: Address) -> bool { + self.labels.insert(key, address).is_none() + } + + /// Converts a symbolic `target` address into a 16-bit relative address from `pos`. + fn make_target(target: usize, pos: LineCol) -> Result { + match u16::try_from(target) { + Ok(num) => Ok(num), + Err(_) => Err(Error::TargetTooFar(pos, target)), + } + } + + /// Applies all registered fixups to the generated code. + fn apply_fixups(&mut self) -> Result<()> { + for (addr, fixup) in self.fixups.drain() { + let pos = self.instrs[addr].linecol; + let instr = match fixup { + Fixup::Call(reg, key) => { + let (target, _end) = + self.user_callables_addresses.get(&key).expect("Must be present"); + bytecode::make_call(reg, Self::make_target(*target, pos)?) + } + Fixup::Gosub(label) => { + let key = SymbolKey::from(&label); + let Some(target) = self.labels.get(&key) else { + return Err(Error::UnknownLabel(pos, label)); + }; + bytecode::make_gosub(Self::make_target(*target, pos)?) + } + Fixup::Goto(label) => { + let key = SymbolKey::from(&label); + let Some(target) = self.labels.get(&key) else { + return Err(Error::UnknownLabel(pos, label)); + }; + bytecode::make_jump(Self::make_target(*target, pos)?) + } + Fixup::OnErrorGoto(label) => { + let key = SymbolKey::from(&label); + let Some(target) = self.labels.get(&key) else { + return Err(Error::UnknownLabel(pos, label)); + }; + bytecode::make_set_error_handler( + ErrorHandlerMode::Jump, + Self::make_target(*target, pos)?, + ) + } + }; + self.code[addr] = instr; + } + debug_assert!(self.fixups.is_empty()); + Ok(()) + } + + /// Gets the existing upcall ID for the given `key` or creates a new one. + pub(super) fn get_upcall( + &mut self, + key: SymbolKey, + etype: Option, + pos: LineCol, + ) -> Result { + match self.upcalls.get(&key) { + Some((_etype, id)) => Ok(id), + None => match self.upcalls.insert(key, etype) { + Some((_etype, id)) => Ok(id), + None => Err(Error::OutOfUpcalls(pos)), + }, + } + } + + /// Builds an incremental update to append into `image`. + pub(super) fn build_image_delta( + &mut self, + image: &Image, + global_vars: HashMap, + data: &[Option], + ) -> Result { + self.apply_fixups()?; + + let code_start = image.code.len().saturating_sub(1); + let constants_start = image.constants.len(); + let instrs_start = image.debug_info.instrs.len().saturating_sub(1); + let upcalls_start = image.upcalls.len(); + + debug_assert_eq!(code_start, instrs_start); + debug_assert!(code_start <= self.code.len()); + debug_assert!(constants_start <= self.constants.len()); + debug_assert!(image.data.len() <= data.len()); + debug_assert!(upcalls_start <= self.upcalls.len()); + + debug_assert_eq!(&image.code[..code_start], &self.code[..code_start]); + debug_assert_eq!(&image.debug_info.instrs[..instrs_start], &self.instrs[..instrs_start],); + debug_assert!( + self.constants.keys_to_vec().starts_with(image.constants.as_slice()), + "Image constants must match the compiler state prefix", + ); + debug_assert!( + self.upcalls.keys_to_vec().starts_with(image.upcalls.as_slice()), + "Image upcalls must match the compiler state prefix", + ); + debug_assert_eq!(image.data.as_slice(), &data[..image.data.len()]); + + let mut callables = HashMap::default(); + for (key, (start_pc, end_pc)) in &self.user_callables_addresses { + let previous = callables.insert(*start_pc, (key.clone(), true)); + debug_assert!(previous.is_none(), "An address can only start one callable"); + + let previous = callables.insert(*end_pc, (key.clone(), false)); + debug_assert!(previous.is_none(), "An address can only start one callable"); + } + + Ok(ImageDelta { + code: self.code[code_start..].to_vec(), + upcalls: self.upcalls.keys_to_vec_from(upcalls_start), + constants: self.constants.keys_to_vec_from(constants_start), + data: data[image.data.len()..].to_vec(), + instrs: self.instrs[instrs_start..].to_vec(), + callables, + global_vars, + }) + } + + #[cfg(test)] + /// Builds a ready-to-use `Image`. + pub(super) fn build_image( + &mut self, + global_vars: HashMap, + data: Vec>, + ) -> Result { + let mut image = Image::default(); + let delta = self.build_image_delta(&image, global_vars, &data)?; + image.append(delta); + Ok(image) + } +} diff --git a/core2/src/compiler/exprs.rs b/core2/src/compiler/exprs.rs new file mode 100644 index 00000000..a6973dd5 --- /dev/null +++ b/core2/src/compiler/exprs.rs @@ -0,0 +1,741 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Functions to convert expressions into bytecode. + +use crate::ast::{Expr, ExprType}; +use crate::bytecode::{self, Register}; +use crate::compiler::args::compile_args; +use crate::compiler::codegen::{Codegen, Fixup}; +use crate::compiler::syms::{self, SymbolKey, SymbolPrototype, TempScope, TempSymtable}; +use crate::compiler::{Error, Result}; +use crate::mem::ConstantDatum; +use crate::reader::LineCol; + +/// Compiles `exprs` into consecutive integer registers allocated from `scope` and returns the +/// first register. The caller must guarantee that `exprs` is non-empty. +pub(super) fn compile_integer_exprs( + codegen: &mut Codegen, + symtable: &mut TempSymtable<'_, '_>, + scope: &mut TempScope, + pos: LineCol, + exprs: impl Iterator, +) -> Result { + let mut first_reg = None; + for expr in exprs { + let reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + if first_reg.is_none() { + first_reg = Some(reg); + } + compile_expr_as_type(codegen, symtable, reg, expr, ExprType::Integer)?; + } + Ok(first_reg.expect("Must have at least one expression")) +} + +/// Compiles an array element access expression into `reg`. +fn compile_array_access( + codegen: &mut Codegen, + symtable: &mut TempSymtable<'_, '_>, + reg: Register, + key_pos: LineCol, + arr_reg: Register, + info: &syms::ArrayInfo, + args: Vec, +) -> Result { + if args.len() != info.ndims { + return Err(Error::WrongNumberOfSubscripts(key_pos, info.ndims, args.len())); + } + + let mut outer_scope = symtable.temp_scope(); + let first_sub_reg = compile_integer_exprs( + codegen, + symtable, + &mut outer_scope, + key_pos, + args.into_iter().map(|a| a.expr.expect("Array subscripts must have expressions")), + )?; + codegen.emit(bytecode::make_load_array(reg, arr_reg, first_sub_reg), key_pos); + Ok(info.subtype) +} + +/// The type of unary operation waiting to be applied. +enum PendingUnaryKind { + Negate, + Not, +} + +/// A pending unary operation waiting to be applied. +struct PendingUnaryOp { + pos: LineCol, + kind: PendingUnaryKind, + make_boolean: Option u32>, + make_integer: fn(Register) -> u32, + make_double: Option u32>, +} + +/// A pending binary operation waiting to be applied. +struct PendingBinaryOp { + pos: LineCol, + rhs: Expr, + op_name: &'static str, + make_boolean: Option u32>, + make_double: Option u32>, + make_integer: fn(Register, Register, Register) -> u32, + make_text: Option u32>, +} + +/// A pending relational operation waiting to be applied. +struct PendingRelationalOp { + pos: LineCol, + rhs: Expr, + op_name: &'static str, + make_boolean: Option u32>, + make_double: Option u32>, + make_integer: Option u32>, + make_text: Option u32>, +} + +/// A pending expression operation waiting to be applied, used to flatten expression chains +/// and avoid recursive calls during processing. +enum PendingOp { + Unary(PendingUnaryOp), + Binary(PendingBinaryOp), + Relational(PendingRelationalOp), +} + +/// Peels the expression chain into a vector of pending ops to avoid deep recursion. +/// +/// Returns the input `expr` holding the innermost non-op expression and the list of +/// pending ops. +fn peel_ops(mut expr: Expr) -> (Expr, Vec) { + let mut pending: Vec = vec![]; + loop { + match expr { + Expr::Add(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "+", + make_boolean: None, + make_double: Some(bytecode::make_add_double), + make_integer: bytecode::make_add_integer, + make_text: Some(bytecode::make_concat), + })); + expr = span.lhs; + } + + Expr::And(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "AND", + make_boolean: Some(bytecode::make_bitwise_and), + make_double: None, + make_integer: bytecode::make_bitwise_and, + make_text: None, + })); + expr = span.lhs; + } + + Expr::Divide(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "/", + make_boolean: None, + make_double: Some(bytecode::make_divide_double), + make_integer: bytecode::make_divide_integer, + make_text: None, + })); + expr = span.lhs; + } + + Expr::Equal(span) => { + let span = *span; + pending.push(PendingOp::Relational(PendingRelationalOp { + pos: span.pos, + rhs: span.rhs, + op_name: "=", + make_boolean: Some(bytecode::make_equal_boolean), + make_double: Some(bytecode::make_equal_double), + make_integer: Some(bytecode::make_equal_integer), + make_text: Some(bytecode::make_equal_text), + })); + expr = span.lhs; + } + + Expr::Greater(span) => { + let span = *span; + pending.push(PendingOp::Relational(PendingRelationalOp { + pos: span.pos, + rhs: span.rhs, + op_name: ">", + make_boolean: None, + make_double: Some(bytecode::make_greater_double), + make_integer: Some(bytecode::make_greater_integer), + make_text: Some(bytecode::make_greater_text), + })); + expr = span.lhs; + } + + Expr::GreaterEqual(span) => { + let span = *span; + pending.push(PendingOp::Relational(PendingRelationalOp { + pos: span.pos, + rhs: span.rhs, + op_name: ">=", + make_boolean: None, + make_double: Some(bytecode::make_greater_equal_double), + make_integer: Some(bytecode::make_greater_equal_integer), + make_text: Some(bytecode::make_greater_equal_text), + })); + expr = span.lhs; + } + + Expr::Less(span) => { + let span = *span; + pending.push(PendingOp::Relational(PendingRelationalOp { + pos: span.pos, + rhs: span.rhs, + op_name: "<", + make_boolean: None, + make_double: Some(bytecode::make_less_double), + make_integer: Some(bytecode::make_less_integer), + make_text: Some(bytecode::make_less_text), + })); + expr = span.lhs; + } + + Expr::LessEqual(span) => { + let span = *span; + pending.push(PendingOp::Relational(PendingRelationalOp { + pos: span.pos, + rhs: span.rhs, + op_name: "<=", + make_boolean: None, + make_double: Some(bytecode::make_less_equal_double), + make_integer: Some(bytecode::make_less_equal_integer), + make_text: Some(bytecode::make_less_equal_text), + })); + expr = span.lhs; + } + + Expr::Modulo(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "MOD", + make_boolean: None, + make_double: Some(bytecode::make_modulo_double), + make_integer: bytecode::make_modulo_integer, + make_text: None, + })); + expr = span.lhs; + } + + Expr::Multiply(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "*", + make_boolean: None, + make_double: Some(bytecode::make_multiply_double), + make_integer: bytecode::make_multiply_integer, + make_text: None, + })); + expr = span.lhs; + } + + Expr::Negate(span) => { + let span = *span; + pending.push(PendingOp::Unary(PendingUnaryOp { + pos: span.pos, + kind: PendingUnaryKind::Negate, + make_boolean: None, + make_integer: bytecode::make_negate_integer, + make_double: Some(bytecode::make_negate_double), + })); + expr = span.expr; + } + + Expr::Not(span) => { + let span = *span; + pending.push(PendingOp::Unary(PendingUnaryOp { + pos: span.pos, + kind: PendingUnaryKind::Not, + make_boolean: Some(bytecode::make_bitwise_xor), + make_integer: bytecode::make_bitwise_not, + make_double: None, + })); + expr = span.expr; + } + + Expr::NotEqual(span) => { + let span = *span; + pending.push(PendingOp::Relational(PendingRelationalOp { + pos: span.pos, + rhs: span.rhs, + op_name: "<>", + make_boolean: Some(bytecode::make_not_equal_boolean), + make_double: Some(bytecode::make_not_equal_double), + make_integer: Some(bytecode::make_not_equal_integer), + make_text: Some(bytecode::make_not_equal_text), + })); + expr = span.lhs; + } + + Expr::Or(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "OR", + make_boolean: Some(bytecode::make_bitwise_or), + make_double: None, + make_integer: bytecode::make_bitwise_or, + make_text: None, + })); + expr = span.lhs; + } + + Expr::Power(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "^", + make_boolean: None, + make_double: Some(bytecode::make_power_double), + make_integer: bytecode::make_power_integer, + make_text: None, + })); + expr = span.lhs; + } + + Expr::ShiftLeft(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "<<", + make_boolean: None, + make_double: None, + make_integer: bytecode::make_shift_left, + make_text: None, + })); + expr = span.lhs; + } + + Expr::ShiftRight(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: ">>", + make_boolean: None, + make_double: None, + make_integer: bytecode::make_shift_right, + make_text: None, + })); + expr = span.lhs; + } + Expr::Subtract(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "-", + make_boolean: None, + make_double: Some(bytecode::make_subtract_double), + make_integer: bytecode::make_subtract_integer, + make_text: None, + })); + expr = span.lhs; + } + + Expr::Xor(span) => { + let span = *span; + pending.push(PendingOp::Binary(PendingBinaryOp { + pos: span.pos, + rhs: span.rhs, + op_name: "XOR", + make_boolean: Some(bytecode::make_bitwise_xor), + make_double: None, + make_integer: bytecode::make_bitwise_xor, + make_text: None, + })); + expr = span.lhs; + } + + _ => break, + } + } + (expr, pending) +} + +/// Emits a cast in `reg` to convert from `from` to `to` if these are numerical types. +/// +/// Returns true if the conversion is valid, regardless of whether a cast was needed. +fn cast_numerical_type( + codegen: &mut Codegen, + reg: Register, + from: ExprType, + to: ExprType, + pos: LineCol, +) -> bool { + match (from, to) { + (ExprType::Double, ExprType::Integer) => { + codegen.emit(bytecode::make_double_to_integer(reg), pos); + true + } + (ExprType::Integer, ExprType::Double) => { + codegen.emit(bytecode::make_integer_to_double(reg), pos); + true + } + (ExprType::Double, ExprType::Double) | (ExprType::Integer, ExprType::Integer) => true, + _ => false, + } +} + +/// Resolves the numeric operand type for a binary operation and emits any required casts. +fn resolve_numeric_binary_type( + codegen: &mut Codegen, + reg: Register, + etype: ExprType, + rtemp: Register, + rtype: ExprType, + rpos: LineCol, + op_pos: LineCol, +) -> Option { + match (etype, rtype) { + (ExprType::Double, ExprType::Double) => Some(ExprType::Double), + (ExprType::Integer, ExprType::Integer) => Some(ExprType::Integer), + (ExprType::Double, ExprType::Integer) => { + let cast_ok = + cast_numerical_type(codegen, rtemp, ExprType::Integer, ExprType::Double, rpos); + debug_assert!(cast_ok); + Some(ExprType::Double) + } + (ExprType::Integer, ExprType::Double) => { + let cast_ok = + cast_numerical_type(codegen, reg, ExprType::Integer, ExprType::Double, op_pos); + debug_assert!(cast_ok); + Some(ExprType::Double) + } + _ => None, + } +} + +/// Processes `pending` binary ops from innermost to outermost, using `reg` as the +/// accumulator. +/// +/// This avoids the deep recursion that would arise if we compiled binary op chains +/// by recursing on the lhs. +fn compile_pending_ops( + codegen: &mut Codegen, + symtable: &mut TempSymtable<'_, '_>, + reg: Register, + mut etype: ExprType, + mut pending: Vec, +) -> Result { + while let Some(op) = pending.pop() { + match op { + PendingOp::Unary(op) => { + let result_type = match etype { + ExprType::Boolean if op.make_boolean.is_some() => ExprType::Boolean, + ExprType::Double if op.make_double.is_some() => ExprType::Double, + ExprType::Integer => ExprType::Integer, + _ => match op.kind { + PendingUnaryKind::Negate => return Err(Error::NotANumber(op.pos, etype)), + PendingUnaryKind::Not => { + return Err(Error::TypeMismatch(op.pos, etype, ExprType::Integer)); + } + }, + }; + match result_type { + ExprType::Boolean => { + let mut scope = symtable.temp_scope(); + let temp = scope.alloc().map_err(|e| Error::from_syms(e, op.pos))?; + codegen.emit_value(temp, ConstantDatum::Integer(1), op.pos)?; + codegen.emit(op.make_boolean.unwrap()(reg, reg, temp), op.pos); + } + ExprType::Double => { + codegen.emit(op.make_double.unwrap()(reg), op.pos); + } + ExprType::Integer => { + codegen.emit((op.make_integer)(reg), op.pos); + } + ExprType::Text => unreachable!(), + } + etype = result_type; + } + PendingOp::Binary(op) => { + let rpos = op.rhs.start_pos(); + let mut scope = symtable.temp_scope(); + let rtemp = scope.alloc().map_err(|e| Error::from_syms(e, rpos))?; + let rtype = compile_expr(codegen, symtable, rtemp, op.rhs)?; + + let result_type = match (etype, rtype) { + (ExprType::Boolean, ExprType::Boolean) if op.make_boolean.is_some() => { + ExprType::Boolean + } + (ExprType::Text, ExprType::Text) if op.make_text.is_some() => ExprType::Text, + (_, _) if op.make_double.is_some() => { + match resolve_numeric_binary_type( + codegen, reg, etype, rtemp, rtype, rpos, op.pos, + ) { + Some(v) => v, + None => { + return Err(Error::BinaryOpType(op.pos, op.op_name, etype, rtype)); + } + } + } + (ExprType::Integer, ExprType::Integer) => ExprType::Integer, + _ => return Err(Error::BinaryOpType(op.pos, op.op_name, etype, rtype)), + }; + + match result_type { + ExprType::Boolean => { + codegen.emit(op.make_boolean.unwrap()(reg, reg, rtemp), op.pos); + } + ExprType::Double => { + codegen.emit(op.make_double.unwrap()(reg, reg, rtemp), op.pos); + } + ExprType::Integer => { + codegen.emit((op.make_integer)(reg, reg, rtemp), op.pos); + } + ExprType::Text => { + codegen.emit(op.make_text.unwrap()(reg, reg, rtemp), op.pos); + } + } + etype = result_type; + } + + PendingOp::Relational(op) => { + let rpos = op.rhs.start_pos(); + let mut scope = symtable.temp_scope(); + let rtemp = scope.alloc().map_err(|e| Error::from_syms(e, rpos))?; + let rtype = compile_expr(codegen, symtable, rtemp, op.rhs)?; + + let make_opcode = match (etype, rtype) { + (ExprType::Boolean, ExprType::Boolean) if op.make_boolean.is_some() => { + op.make_boolean.unwrap() + } + + (ExprType::Text, ExprType::Text) if op.make_text.is_some() => { + op.make_text.unwrap() + } + + (_, _) if op.make_double.is_some() || op.make_integer.is_some() => { + match resolve_numeric_binary_type( + codegen, reg, etype, rtemp, rtype, rpos, op.pos, + ) { + Some(ExprType::Double) => op.make_double.expect("Must exist"), + Some(ExprType::Integer) => op.make_integer.expect("Must exist"), + _ => { + return Err(Error::BinaryOpType(op.pos, op.op_name, etype, rtype)); + } + } + } + + _ => return Err(Error::BinaryOpType(op.pos, op.op_name, etype, rtype)), + }; + + codegen.emit(make_opcode(reg, reg, rtemp), op.pos); + etype = ExprType::Boolean; + } + } + } + + Ok(etype) +} + +/// Compiles a single expression `expr` and leaves its value in `reg`. +/// +/// For left-recursive binary operations (like `a + b + c`), this function iterates rather +/// than recurses so that very long expression chains do not overflow the call stack. +pub(super) fn compile_expr( + codegen: &mut Codegen, + symtable: &mut TempSymtable<'_, '_>, + reg: Register, + expr: Expr, +) -> Result { + let (expr, pending) = peel_ops(expr); + + let etype = match expr { + Expr::Add(..) + | Expr::And(..) + | Expr::Divide(..) + | Expr::Equal(..) + | Expr::Greater(..) + | Expr::GreaterEqual(..) + | Expr::Less(..) + | Expr::LessEqual(..) + | Expr::Modulo(..) + | Expr::Multiply(..) + | Expr::Negate(..) + | Expr::Not(..) + | Expr::NotEqual(..) + | Expr::Or(..) + | Expr::Power(..) + | Expr::ShiftLeft(..) + | Expr::ShiftRight(..) + | Expr::Subtract(..) + | Expr::Xor(..) => unreachable!("Peeled by peel_ops"), + + Expr::Boolean(span) => { + codegen.emit_value(reg, ConstantDatum::Boolean(span.value), span.pos)?; + Ok(ExprType::Boolean) + } + + Expr::Call(span) => { + let key = SymbolKey::from(&span.vref.name); + let key_pos = span.vref_pos; + + if let Some(md) = symtable.get_callable(&key) { + let md = md.clone(); + + let Some(etype) = md.return_type() else { + return Err(Error::NotAFunction(span.vref_pos, span.vref)); + }; + + if md.is_argless() { + return Err(Error::CallableSyntax(span.vref_pos, md.as_ref().clone())); + } + + let is_user_defined = md.is_user_defined(); + let mut call_scope = symtable.temp_scope(); + let ret_reg = call_scope.alloc().map_err(|e| Error::from_syms(e, key_pos))?; + let (_first_temp, arg_linecols) = + compile_args(span, md.clone(), symtable, codegen)?; + + if is_user_defined { + let addr = codegen.emit(bytecode::make_nop(), key_pos); + codegen.set_arg_linecols(addr, arg_linecols); + codegen.add_fixup(addr, Fixup::Call(ret_reg, key)); + } else { + let upcall = codegen.get_upcall(key, Some(etype), key_pos)?; + let addr = codegen.emit(bytecode::make_upcall(upcall, ret_reg), key_pos); + codegen.set_arg_linecols(addr, arg_linecols); + } + if reg != ret_reg { + codegen.emit(bytecode::make_move(reg, ret_reg), key_pos); + } + + Ok(etype) + } else { + match symtable.get_local_or_global(&span.vref) { + Ok((arr_reg, SymbolPrototype::Array(info))) => compile_array_access( + codegen, symtable, reg, key_pos, arr_reg, &info, span.args, + ), + Err(syms::Error::UndefinedSymbol(..)) | Ok((_, SymbolPrototype::Scalar(_))) => { + return Err(Error::UndefinedSymbol(span.vref_pos, span.vref)); + } + Err(e) => return Err(Error::from_syms(e, key_pos)), + } + } + } + + Expr::Double(span) => { + codegen.emit_value(reg, ConstantDatum::Double(span.value), span.pos)?; + Ok(ExprType::Double) + } + + Expr::Integer(span) => { + codegen.emit_value(reg, ConstantDatum::Integer(span.value), span.pos)?; + Ok(ExprType::Integer) + } + + Expr::Symbol(span) => match symtable.get_local_or_global(&span.vref) { + Ok((local, SymbolPrototype::Scalar(etype))) => { + codegen.emit(bytecode::make_move(reg, local), span.pos); + Ok(etype) + } + + Ok((_, SymbolPrototype::Array(_))) => { + Err(Error::ArrayUsedAsScalar(span.pos, span.vref)) + } + + Err(syms::Error::UndefinedSymbol(..)) => { + let key = SymbolKey::from(&span.vref.name); + + let Some(md) = symtable.get_callable(&key) else { + return Err(Error::UndefinedSymbol(span.pos, span.vref)); + }; + + let Some(etype) = md.return_type() else { + return Err(Error::NotAFunction(span.pos, span.vref)); + }; + + if !md.is_argless() { + return Err(Error::CallableSyntax(span.pos, md.as_ref().clone())); + } + + if md.is_user_defined() { + let addr = codegen.emit(bytecode::make_nop(), span.pos); + codegen.add_fixup(addr, Fixup::Call(reg, key)); + } else { + let upcall = codegen.get_upcall(key, Some(etype), span.pos)?; + let (is_global, _) = reg.to_parts(); + if is_global { + let mut scope = symtable.temp_scope(); + let temp = scope.alloc().map_err(|e| Error::from_syms(e, span.pos))?; + codegen.emit(bytecode::make_upcall(upcall, temp), span.pos); + codegen.emit(bytecode::make_move(reg, temp), span.pos); + } else { + codegen.emit(bytecode::make_upcall(upcall, reg), span.pos); + } + } + Ok(etype) + } + + Err(e) => Err(Error::from_syms(e, span.pos)), + }, + + Expr::Text(span) => { + codegen.emit_value(reg, ConstantDatum::Text(span.value), span.pos)?; + Ok(ExprType::Text) + } + }?; + + compile_pending_ops(codegen, symtable, reg, etype, pending) +} + +/// Compiles a single expression, expecting it to be of a `target` type. Applies casts if +/// possible. +pub(super) fn compile_expr_as_type( + codegen: &mut Codegen, + symtable: &mut TempSymtable<'_, '_>, + reg: Register, + expr: Expr, + target: ExprType, +) -> Result<()> { + let epos = expr.start_pos(); + let etype = compile_expr(codegen, symtable, reg, expr)?; + if etype == target || cast_numerical_type(codegen, reg, etype, target, epos) { + Ok(()) + } else { + if target.is_numerical() { + Err(Error::NotANumber(epos, etype)) + } else { + Err(Error::TypeMismatch(epos, etype, target)) + } + } +} diff --git a/core2/src/compiler/ids.rs b/core2/src/compiler/ids.rs new file mode 100644 index 00000000..02454ca0 --- /dev/null +++ b/core2/src/compiler/ids.rs @@ -0,0 +1,170 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! ID generators. + +use std::collections::HashMap; +use std::convert::TryFrom; +use std::hash::Hash; + +/// Hash map that assigns sequential identifiers to elements as they are inserted and +/// allows later retrieval of these identifiers and retrieving the inserted values in +/// insertion order. +#[derive(Clone)] +pub(super) struct HashMapWithIds { + /// The underlying storage mapping keys to their values and assigned identifiers. + map: HashMap, +} + +impl Default for HashMapWithIds { + fn default() -> Self { + Self { map: HashMap::default() } + } +} + +impl HashMapWithIds +where + K: Clone + Eq + Hash, + I: Copy + std::fmt::Debug + Ord + TryFrom, + V: Copy + std::fmt::Debug + PartialEq, +{ + /// Gets the value and identifier for a `key`. + /// + /// Returns `None` if the key is not present. + pub(super) fn get(&self, key: &K) -> Option<(&V, I)> { + self.map.get(key).map(|(v, i)| (v, *i)) + } + + /// Gets mutable access to the value and identifier for a `key`. + /// + /// Returns `None` if the key is not present. + pub(super) fn get_mut(&mut self, key: &K) -> Option<(&mut V, I)> { + self.map.get_mut(key).map(|(v, i)| (v, *i)) + } + + /// Inserts the `key`/`value` pair into the hash map, assigning a new identifier + /// to the `key` if it does not yet have one. + /// + /// If the `key` is already present, returns a pair with the previous value and the already + /// assigned identifier. If the `keys` is not yet present, returns a pair with None and the + /// newly-assigned identifier. + /// + /// Returns `None` when the IDs run out. + pub(super) fn insert(&mut self, key: K, value: V) -> Option<(Option, I)> { + let id = match self.map.get(&key) { + Some((_value, id)) => *id, + None => match I::try_from(self.map.len()) { + Ok(id) => id, + Err(_) => return None, + }, + }; + self.map + .insert(key, (value, id)) + .map(|(prev_value, prev_id)| { + debug_assert_eq!(prev_id, id); + (Some(prev_value), id) + }) + .or(Some((None, id))) + } + + /// Returns the number of assigned identifiers. + pub(super) fn len(&self) -> usize { + self.map.len() + } + + /// Iterates over all entries, yielding `(key, value, id)` tuples in arbitrary order. + pub(super) fn iter(&self) -> impl Iterator + '_ { + self.map.iter().map(|(k, (v, i))| (k, v, *i)) + } + + /// Returns the keys in insertion order. + pub(super) fn keys_to_vec(&self) -> Vec { + let mut reverse = self.map.iter().collect::>(); + reverse.sort_by_key(|(_key, (_value, index))| *index); + reverse.into_iter().map(|(key, _index)| key.clone()).collect() + } + + /// Returns the keys with identifiers greater than or equal to `start`, in insertion order. + pub(super) fn keys_to_vec_from(&self, start: usize) -> Vec { + self.keys_to_vec().into_iter().skip(start).collect() + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_hash_map_with_ids_basic_hashmap_api() { + let mut map = HashMapWithIds::<&'static str, &'static str, u8>::default(); + + assert_eq!(Some((None, 0)), map.insert("first", "v1")); + assert_eq!(Some((None, 1)), map.insert("second", "v2")); + + assert_eq!(Some((&"v1", 0)), map.get(&"first")); + assert_eq!(Some((&"v2", 1)), map.get(&"second")); + assert_eq!(None, map.get(&"third")); + + { + let mut_first = map.get_mut(&"first"); + assert_eq!(Some((&mut "v1", 0)), mut_first); + *mut_first.unwrap().0 = "edited"; + } + + assert_eq!(Some((&"edited", 0)), map.get(&"first")); + assert_eq!(Some((&"v2", 1)), map.get(&"second")); + assert_eq!(None, map.get(&"third")); + + assert_eq!(2, map.len()); + } + + #[test] + fn test_hash_map_with_ids_use_u8_ids() { + let mut map = HashMapWithIds::<&'static str, (), u8>::default(); + + assert_eq!(Some((None, 0)), map.insert("foo", ())); + assert_eq!(Some((None, 1)), map.insert("bar", ())); + assert_eq!(Some((None, 2)), map.insert("baz", ())); + + assert_eq!(Some((Some(()), 1)), map.insert("bar", ())); + + assert_eq!(["foo", "bar", "baz"], map.keys_to_vec().as_slice()); + assert_eq!(["bar", "baz"], map.keys_to_vec_from(1).as_slice()); + } + + #[test] + fn test_hash_map_with_ids_use_usize_ids() { + let mut map = HashMapWithIds::<&'static str, (), usize>::default(); + + assert_eq!(Some((None, 0)), map.insert("foo", ())); + assert_eq!(Some((None, 1)), map.insert("bar", ())); + assert_eq!(Some((None, 2)), map.insert("baz", ())); + + assert_eq!(Some((Some(()), 1)), map.insert("bar", ())); + + assert_eq!(["foo", "bar", "baz"], map.keys_to_vec().as_slice()); + assert_eq!(["baz"], map.keys_to_vec_from(2).as_slice()); + } + + #[test] + fn test_hash_map_with_ids_run_out_of_ids() { + let mut map = HashMapWithIds::::default(); + + for i in 0..(u16::from(u8::MAX) + 1) { + assert!(map.insert(i, ()).is_some()); + } + assert!(map.insert(u16::from(u8::MAX) + 1, ()).is_none()); + } +} diff --git a/core2/src/compiler/mod.rs b/core2/src/compiler/mod.rs new file mode 100644 index 00000000..de7e1d90 --- /dev/null +++ b/core2/src/compiler/mod.rs @@ -0,0 +1,232 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Compiler for the EndBASIC language into bytecode. + +use crate::ast::{ExprType, VarRef}; +use crate::bytecode::{InvalidExitCodeError, RegisterScope}; +use crate::callable::CallableMetadata; +use crate::image::Image; +use crate::reader::LineCol; +use crate::{Callable, parser}; +use std::collections::HashMap; +use std::io; +use std::rc::Rc; + +mod args; + +mod codegen; + +mod exprs; + +mod ids; + +mod syms; +pub use syms::SymbolKey; +use syms::{GlobalSymtable, LocalSymtable, LocalSymtableSnapshot}; + +mod top; +use top::{Context, prepare_globals}; +pub use top::{GlobalDef, GlobalDefKind, only_metadata}; + +/// Errors that can occur during compilation. +#[derive(Debug, thiserror::Error)] +pub enum Error { + /// Attempt to redefine an already-defined symbol. + #[error("{0}: Cannot redefine {1}")] + AlreadyDefined(LineCol, VarRef), + + /// Array name used without subscripts (as a scalar). + #[error("{0}: {1} is an array and requires subscripts")] + ArrayUsedAsScalar(LineCol, VarRef), + + /// Type mismatch in a binary operation. + #[error("{0}: Cannot {1} {2} and {3}")] + BinaryOpType(LineCol, &'static str, ExprType, ExprType), + + /// Callable invoked with incorrect syntax. + // TODO(jmmv): It'd be nice if we could carry an Rc here to avoid copying + // but... because of async in consumers, we would need an `Arc` instead just for this single + // error type. Given that performance during error propagation is not important, the copy + // is just fine. If we ever have to pollute everything with `Arc`s in the future, then we + // could do this. + #[error("{0}: {} expected {}", .1.name(), .1.syntax())] + CallableSyntax(LineCol, CallableMetadata), + + /// Attempt to nest FUNCTION or SUB definitions. + #[error("{0}: Cannot nest FUNCTION or SUB declarations nor definitions")] + CannotNestUserCallables(LineCol), + + /// Attempt to redefine an already-defined label. + #[error("{0}: Duplicate label {1}")] + DuplicateLabel(LineCol, String), + + /// Type annotation in a reference doesn't match the variable's type. + #[error("{0}: Incompatible type annotation in {1} reference")] + IncompatibleTypeAnnotationInReference(LineCol, VarRef), + + /// Type mismatch in an assignment. + #[error("{0}: Cannot assign value of type {1} to variable of type {2}")] + IncompatibleTypesInAssignment(LineCol, ExprType, ExprType), + + /// `END` code is out of range. + #[error("{0}: {1}")] + InvalidEndCode(LineCol, String), + + /// I/O error while reading the source. + #[error("{0}: I/O error during compilation: {1}")] + Io(LineCol, io::Error), + + /// Attempt to call something that is not a function. + #[error("{0}: Cannot call {1} (not a function)")] + NotAFunction(LineCol, VarRef), + + /// `EXIT` statement found outside its expected block. + #[error("{0}: EXIT {1} outside of {1}")] + MisplacedExit(LineCol, &'static str), + + /// Attempt to index something that is not an array. + #[error("{0}: {1} is not an array")] + NotAnArray(LineCol, VarRef), + + /// Expected a numeric type but got something else. + #[error("{0}: {1} is not a number")] + NotANumber(LineCol, ExprType), + + /// Constants pool has been exhausted. + #[error("{0}: Out of constants")] + OutOfConstants(LineCol), + + /// Register allocation has been exhausted. + #[error("{0}: Out of {1} registers")] + OutOfRegisters(LineCol, RegisterScope), + + /// Upcall table has been exhausted. + #[error("{0}: Out of upcalls")] + OutOfUpcalls(LineCol), + + /// Syntax error from the parser. + #[error("{0}: {1}")] + Parse(LineCol, String), + + /// Jump or call target is too far away. + #[error("{0}: Jump/call target is {1} which is too far")] + TargetTooFar(LineCol, usize), + + /// An array has too many dimensions. + #[error("{0}: Array cannot have {1} dimensions")] + TooManyArrayDimensions(LineCol, usize), + + /// Type mismatch where a specific type was expected. + #[error("{0}: Expected {2} but found {1}")] + TypeMismatch(LineCol, ExprType, ExprType), + + /// Reference to an undefined symbol. + #[error("{0}: Undefined symbol {1}")] + UndefinedSymbol(LineCol, VarRef), + + /// Reference to an unknown label. + #[error("{0}: Unknown label {1}")] + UnknownLabel(LineCol, String), + + /// Wrong number of subscripts for an array access. + #[error("{0}: Array requires {1} subscripts but got {2}")] + WrongNumberOfSubscripts(LineCol, usize, usize), +} + +impl Error { + /// Annotates an invalid `END` exit code error with a source position. + fn from_bytecode_invalid_exit_code(value: InvalidExitCodeError, pos: LineCol) -> Self { + Self::InvalidEndCode(pos, value.to_string()) + } + + /// Annotates an error from the symbol table with the position it arised from. + fn from_syms(value: syms::Error, pos: LineCol) -> Self { + match value { + syms::Error::AlreadyDefined(vref) => Error::AlreadyDefined(pos, vref), + syms::Error::IncompatibleTypeAnnotationInReference(vref) => { + Error::IncompatibleTypeAnnotationInReference(pos, vref) + } + syms::Error::OutOfRegisters(scope) => Error::OutOfRegisters(pos, scope), + syms::Error::UndefinedSymbol(vref, _scope) => Error::UndefinedSymbol(pos, vref), + } + } +} + +impl From for Error { + fn from(value: parser::Error) -> Self { + match value { + parser::Error::Bad(pos, message) => Self::Parse(pos, message), + parser::Error::Io(pos, e) => Self::Io(pos, e), + } + } +} + +/// Result type for compilation operations. +pub type Result = std::result::Result; + +/// Compiler context. +/// +/// This exists to support incremental compilation by keeping state and appending code to the +/// image being built, which is useful in REPL scenarios. +pub struct Compiler { + context: Context, + symtable: GlobalSymtable, + program_scope: LocalSymtableSnapshot, +} + +impl Compiler { + /// Creates a new compiler instance. + /// + /// `global_defs` provides pre-defined global variables visible to the compiled program. + /// + /// `upcalls` contains the metadata of all built-in callables that the compiled code can use. + pub fn new( + upcalls: &HashMap>, + global_defs: &[GlobalDef], + ) -> Result { + let mut upcalls_metadata = HashMap::with_capacity(upcalls.len()); + for (k, v) in upcalls.iter() { + upcalls_metadata.insert(k.clone(), v.metadata()); + } + + let mut context = Context::default(); + + let mut symtable = GlobalSymtable::new(upcalls_metadata); + prepare_globals(&mut context, &mut symtable, global_defs)?; + + Ok(Self { context, symtable, program_scope: LocalSymtableSnapshot::default() }) + } + + /// Compiles a chunk of code. + pub fn compile(mut self, input: &mut dyn io::Read) -> Result { + let mut image = Image::default(); + self.compile_more(&mut image, input)?; + Ok(image) + } + + /// Compiles a chunk of code and appends it to `image`. + pub fn compile_more(&mut self, image: &mut Image, input: &mut dyn io::Read) -> Result<()> { + let mut new_context = self.context.clone(); + let mut new_symtable = self.symtable.clone(); + let program_scope = LocalSymtable::restore(&mut new_symtable, self.program_scope.clone()); + let (delta, snapshot) = top::compile(input, image, &mut new_context, program_scope)?; + image.append(delta); + self.context = new_context; + self.symtable = new_symtable; + self.program_scope = snapshot; + Ok(()) + } +} diff --git a/core2/src/compiler/syms.rs b/core2/src/compiler/syms.rs new file mode 100644 index 00000000..43252a6b --- /dev/null +++ b/core2/src/compiler/syms.rs @@ -0,0 +1,1077 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Symbol table for EndBASIC compilation. + +use crate::ast::{ExprType, VarRef}; +use crate::bytecode::{Register, RegisterScope}; +use crate::compiler::ids::HashMapWithIds; +use crate::{CallableMetadata, bytecode}; +use std::cell::Cell; +use std::cell::RefCell; +use std::cmp::max; +use std::collections::HashMap; +use std::convert::TryFrom; +use std::fmt; +use std::rc::Rc; + +/// Information about an array tracked in the symbol table. +#[derive(Clone, Copy, Debug, PartialEq)] +pub(super) struct ArrayInfo { + /// Element type of the array. + pub(super) subtype: ExprType, + + /// Number of dimensions. + pub(super) ndims: usize, +} + +/// Prototype for a variable-like symbol (scalar or array). +#[derive(Clone, Copy, Debug, PartialEq)] +pub(super) enum SymbolPrototype { + /// An array with the given element type and number of dimensions. + Array(ArrayInfo), + + /// A scalar variable of the given type. + Scalar(ExprType), +} + +/// Errors related to symbols handling. +#[derive(Debug, thiserror::Error)] +#[allow(missing_docs)] // The error messages and names are good enough. +pub(super) enum Error { + #[error("Cannot redefine {0}")] + AlreadyDefined(VarRef), + + #[error("Incompatible type annotation in {0} reference")] + IncompatibleTypeAnnotationInReference(VarRef), + + #[error("Out of {0} registers")] + OutOfRegisters(RegisterScope), + + #[error("Undefined {1} symbol {0}")] + UndefinedSymbol(VarRef, RegisterScope), +} + +/// Result type for symbol table operations. +type Result = std::result::Result; + +/// The key of a symbol in the symbols table. +/// +/// The key is stored in a canonicalized form (uppercase) to make all lookups case-insensitive. +#[derive(Clone, Debug, Hash, Eq, Ord, PartialEq, PartialOrd)] +pub struct SymbolKey(String); + +impl> From for SymbolKey { + fn from(value: R) -> Self { + Self(value.as_ref().to_ascii_uppercase()) + } +} + +impl fmt::Display for SymbolKey { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{}", self.0) + } +} + +/// Gets the register and prototype of a local or global variable if it already exists. +fn get_var( + vref: &VarRef, + table: &HashMapWithIds, + make_register: MKR, + scope: RegisterScope, +) -> Result<(Register, SymbolPrototype)> +where + MKR: FnOnce(u8) -> std::result::Result, +{ + let key = SymbolKey::from(&vref.name); + match table.get(&key) { + Some((SymbolPrototype::Array(info), reg)) => { + if !vref.accepts(info.subtype) { + return Err(Error::IncompatibleTypeAnnotationInReference(vref.clone())); + } + + let reg = make_register(reg).map_err(|_| Error::OutOfRegisters(scope))?; + Ok((reg, SymbolPrototype::Array(*info))) + } + + Some((SymbolPrototype::Scalar(etype), reg)) => { + if !vref.accepts(*etype) { + return Err(Error::IncompatibleTypeAnnotationInReference(vref.clone())); + } + + let reg = make_register(reg).map_err(|_| Error::OutOfRegisters(scope))?; + Ok((reg, SymbolPrototype::Scalar(*etype))) + } + + None => Err(Error::UndefinedSymbol(vref.clone(), scope)), + } +} + +/// Defines a new local or global variable (or array) and assigns a register to it. +/// +/// Panics if the symbol already exists. +fn put_var( + key: SymbolKey, + proto: SymbolPrototype, + table: &mut HashMapWithIds, + make_register: MKR, + scope: RegisterScope, +) -> Result +where + MKR: FnOnce(u8) -> std::result::Result, +{ + match table.insert(key, proto) { + Some((None, reg)) => Ok(make_register(reg).map_err(|_| Error::OutOfRegisters(scope))?), + + Some((Some(_old_proto), _reg)) => { + unreachable!("Cannot redefine symbol; caller must check for presence first"); + } + + None => Err(Error::OutOfRegisters(scope)), + } +} + +/// Representation of the symbol table for global symbols. +/// +/// Globals are variables and callables that are visible from any scope. +#[derive(Clone)] +pub(crate) struct GlobalSymtable { + /// Map of global variable names to their prototypes and assigned registers. + globals: HashMapWithIds, + + /// Reference to the built-in callable metadata provided by the runtime. + upcalls: HashMap>, + + /// Map of user-defined callable names to their metadata. + user_callables: HashMap>, +} + +impl GlobalSymtable { + /// Creates a new global symbol table that knows about the given `upcalls`. + pub(crate) fn new(upcalls: HashMap>) -> Self { + Self { globals: HashMapWithIds::default(), upcalls, user_callables: HashMap::default() } + } + + /// Enters a new local scope. + pub(crate) fn enter_scope(&mut self) -> LocalSymtable<'_> { + LocalSymtable::new(self) + } + + /// Gets a global symbol by its `vref`, returning its register and prototype. + pub(crate) fn get_global(&self, vref: &VarRef) -> Result<(Register, SymbolPrototype)> { + get_var(vref, &self.globals, Register::global, RegisterScope::Global) + } + + /// Creates a new global symbol `key` with `proto`. + pub(crate) fn put_global( + &mut self, + key: SymbolKey, + proto: SymbolPrototype, + ) -> Result { + put_var(key, proto, &mut self.globals, Register::global, RegisterScope::Global) + } + + /// Returns true if a global variable `key` is already defined. + pub(crate) fn contains_global(&self, key: &SymbolKey) -> bool { + self.globals.get(key).is_some() + } + + /// Iterates over all global variables, yielding `(key, prototype, register_index)` tuples. + pub(crate) fn iter_globals( + &self, + ) -> impl Iterator + '_ { + self.globals.iter().map(|(k, v, i)| (k, *v, i)) + } + + /// Defines a new user-defined `vref` callable with `md` metadata. + pub(crate) fn declare_user_callable( + &mut self, + vref: &VarRef, + md: Rc, + ) -> Result<()> { + let key = SymbolKey::from(&vref.name); + if self.globals.get(&key).is_some() { + return Err(Error::AlreadyDefined(vref.clone())); + } + if let Some(previous_md) = self.user_callables.insert(key.clone(), md.clone()) + && previous_md != md + { + return Err(Error::AlreadyDefined(vref.clone())); + } + Ok(()) + } + + /// Gets a callable by its name `key`. + pub(crate) fn get_callable(&self, key: &SymbolKey) -> Option> { + self.user_callables.get(key).or(self.upcalls.get(key)).cloned() + } +} + +#[derive(Clone, Default)] +pub(crate) struct LocalSymtableSnapshot { + /// Map of local variable names to their prototypes and assigned registers. + locals: HashMapWithIds, + + /// Maximum number of allocated temporary registers in all possible evaluation scopes created + /// by this local symtable. This is used to determine the size of the scope for register + /// allocation purposes at runtime. + count_temps: u8, + + /// Number of reserved temporary registers that are active outside of `TempScope`. + active_temps: Rc>, +} + +/// Representation of the symbol table for a local scope. +/// +/// A local scope can see all global symbols and defines its own symbols, which can shadow the +/// global ones. +pub(crate) struct LocalSymtable<'a> { + /// Reference to the parent global symbol table. + symtable: &'a mut GlobalSymtable, + + /// Map of local variable names to their prototypes and assigned registers. + locals: HashMapWithIds, + + /// Maximum number of allocated temporary registers in all possible evaluation scopes created + /// by this local symtable. This is used to determine the size of the scope for register + /// allocation purposes at runtime. + count_temps: u8, + + /// Number of reserved temporary registers that are active outside of `TempScope`. + active_temps: Rc>, +} + +impl<'a> LocalSymtable<'a> { + /// Creates a new local symbol table within the context of a global `symtable`. + fn new(symtable: &'a mut GlobalSymtable) -> Self { + Self { + symtable, + locals: HashMapWithIds::default(), + count_temps: 0, + active_temps: Rc::from(Cell::new(0)), + } + } + + /// Preserves the state of this local symbol table, detached from the global symbol table + /// it belongs to. + pub(crate) fn save(self) -> LocalSymtableSnapshot { + LocalSymtableSnapshot { + locals: self.locals, + count_temps: self.count_temps, + active_temps: self.active_temps, + } + } + + /// Reattaches a previous local symbol table content to a global symbol table so that it + /// can be used again for compilation. + pub(crate) fn restore( + symtable: &'a mut GlobalSymtable, + snapshot: LocalSymtableSnapshot, + ) -> Self { + Self { + symtable, + locals: snapshot.locals, + count_temps: snapshot.count_temps, + active_temps: snapshot.active_temps, + } + } + + /// Obtains mutable access to the parent global symtable. + pub(crate) fn global(&mut self) -> &mut GlobalSymtable { + self.symtable + } + + /// Declares a new user-defined `vref` callable with `md` metadata. + pub(crate) fn declare_user_callable( + &mut self, + vref: &VarRef, + md: Rc, + ) -> Result<()> { + self.symtable.declare_user_callable(vref, md) + } + + /// Freezes this table to get a `TempSymtable` that can be used to compile expressions. + pub(crate) fn frozen(&mut self) -> TempSymtable<'_, 'a> { + TempSymtable::new(self) + } + + /// Reserves one temporary register for the duration of `f`. + pub(crate) fn with_reserved_temp( + &mut self, + map_error: ME, + f: F, + ) -> std::result::Result + where + ME: Fn(Error) -> E, + F: FnOnce(Register, &mut TempSymtable<'_, 'a>) -> std::result::Result, + { + struct TempReservationGuard { + active_temps: Rc>, + } + + impl Drop for TempReservationGuard { + fn drop(&mut self) { + let active_temps = self.active_temps.get(); + debug_assert!(active_temps > 0); + self.active_temps.set(active_temps - 1); + } + } + + let nlocals = u8::try_from(self.locals.len()) + .map_err(|_| map_error(Error::OutOfRegisters(RegisterScope::Local)))?; + let first_temp = self.active_temps.get(); + let new_active_temps = first_temp + .checked_add(1) + .ok_or(map_error(Error::OutOfRegisters(RegisterScope::Temp)))?; + self.active_temps.set(new_active_temps); + self.count_temps = max(self.count_temps, new_active_temps); + let _guard = TempReservationGuard { active_temps: self.active_temps.clone() }; + + let reg_idx = u8::try_from(usize::from(nlocals) + usize::from(first_temp)) + .map_err(|_| map_error(Error::OutOfRegisters(RegisterScope::Temp)))?; + let reg = Register::local(reg_idx) + .map_err(|_| map_error(Error::OutOfRegisters(RegisterScope::Temp)))?; + + let mut temp = self.frozen(); + f(reg, &mut temp) + } + + /// Creates a new global symbol `key` with `proto` via the parent global symbol table. + pub(crate) fn put_global( + &mut self, + key: SymbolKey, + proto: SymbolPrototype, + ) -> Result { + self.symtable.put_global(key, proto) + } + + /// Gets a symbol by its `vref`, looking for it in the local and global scopes. + pub(crate) fn get_local_or_global(&self, vref: &VarRef) -> Result<(Register, SymbolPrototype)> { + match get_var(vref, &self.locals, Register::local, RegisterScope::Local) { + Ok(local) => Ok(local), + Err(Error::UndefinedSymbol(..)) => self.symtable.get_global(vref), + Err(e) => Err(e), + } + } + + /// Gets a callable by its name `key`. + pub(crate) fn get_callable(&self, key: &SymbolKey) -> Option> { + self.symtable.get_callable(key) + } + + /// Creates a new local symbol `key` with `proto`. + pub(crate) fn put_local(&mut self, key: SymbolKey, proto: SymbolPrototype) -> Result { + put_var(key, proto, &mut self.locals, Register::local, RegisterScope::Local) + } + + /// Returns true if a local variable `key` is already defined. + pub(crate) fn contains_local(&self, key: &SymbolKey) -> bool { + self.locals.get(key).is_some() + } + + /// Returns true if a global variable `key` is already defined. + pub(crate) fn contains_global(&self, key: &SymbolKey) -> bool { + self.symtable.contains_global(key) + } + + /// Iterates over all global variables, yielding `(key, prototype, register_index)` tuples. + pub(crate) fn iter_globals( + &self, + ) -> impl Iterator + '_ { + self.symtable.iter_globals().map(|(k, v, i)| (k.clone(), v, i)) + } + + /// Changes the type of an existing local variable `vref` to `new_etype`. + /// + /// This is used for type inference on first assignment. + pub(crate) fn fixup_local_type(&mut self, vref: &VarRef, new_etype: ExprType) -> Result<()> { + let key = SymbolKey::from(&vref.name); + // TODO: Verify reference type. + match self.locals.get_mut(&key) { + Some((SymbolPrototype::Array(_), _)) | None => { + Err(Error::UndefinedSymbol(vref.clone(), RegisterScope::Local)) + } + + Some((SymbolPrototype::Scalar(etype), _reg)) => { + *etype = new_etype; + Ok(()) + } + } + } +} + +/// A read-only view into a `SymTable` that allows allocating temporary registers. +/// +/// This layer on top of `LocalSymtable` may seem redundant because all of the temporary +/// register manipulation happens in `TempScope`, but it is necessary to have this layer +/// to forbid mutations to local variables. We need to be able to pass a `TempSymtable` +/// across recursive function calls (for expression evaluation), but at the same time we +/// need each call site to have its own `TempScope` for temporary register cleanup. +pub(crate) struct TempSymtable<'temp, 'local> { + /// Reference to the underlying local symbol table. + symtable: &'temp mut LocalSymtable<'local>, + + /// Number of temporary registers that were already reserved on creation. + base_temp: u8, + + /// Index of the next temporary register to allocate. + next_temp: Rc>, + + /// Maximum number of allocated temporary registers in a given evaluation (recursion) path. + count_temps: Rc>, +} + +impl<'temp, 'local> Drop for TempSymtable<'temp, 'local> { + fn drop(&mut self) { + debug_assert_eq!(self.base_temp, *self.next_temp.borrow(), "Unbalanced temp drops"); + self.symtable.count_temps = max(self.symtable.count_temps, *self.count_temps.borrow()); + } +} + +impl<'temp, 'local> TempSymtable<'temp, 'local> { + /// Creates a new temporary symbol table from a `local` table. + fn new(symtable: &'temp mut LocalSymtable<'local>) -> Self { + let base_temp = symtable.active_temps.get(); + Self { + symtable, + base_temp, + next_temp: Rc::from(RefCell::from(base_temp)), + count_temps: Rc::from(RefCell::from(base_temp)), + } + } + + /// Gets a symbol by its `vref`, looking for it in the local and global scopes. + pub(crate) fn get_local_or_global(&self, vref: &VarRef) -> Result<(Register, SymbolPrototype)> { + self.symtable.get_local_or_global(vref) + } + + /// Gets a callable by its name `key`. + pub(crate) fn get_callable(&self, key: &SymbolKey) -> Option> { + self.symtable.get_callable(key) + } + + /// Enters a new temporary scope. + pub(crate) fn temp_scope(&self) -> TempScope { + let nlocals = u8::try_from(self.symtable.locals.len()) + .expect("Cannot have allocated more locals than u8"); + TempScope { + base_temp: *self.next_temp.borrow(), + nlocals, + ntemps: 0, + next_temp: self.next_temp.clone(), + count_temps: self.count_temps.clone(), + } + } +} + +/// A scope for temporary registers. +/// +/// Temporaries are allocated on demand and are cleaned up when the scope is dropped. +pub(crate) struct TempScope { + /// Number of temporary registers that were already active on scope creation. + base_temp: u8, + + /// Number of local variables in the enclosing scope, used as the base for temporary registers. + nlocals: u8, + + /// Number of temporary registers allocated by this scope. + ntemps: u8, + + /// Shared counter for the next temporary register index to allocate. + next_temp: Rc>, + + /// Shared counter tracking the maximum number of temporary registers used. + count_temps: Rc>, +} + +impl Drop for TempScope { + fn drop(&mut self) { + let mut next_temp = self.next_temp.borrow_mut(); + debug_assert!(*next_temp >= self.ntemps); + *next_temp -= self.ntemps; + } +} + +impl TempScope { + /// Returns the first register available for this scope. + pub(crate) fn first(&mut self) -> Result { + let reg = u8::try_from(usize::from(self.nlocals) + usize::from(self.base_temp)) + .map_err(|_| Error::OutOfRegisters(RegisterScope::Temp))?; + Register::local(reg).map_err(|_| Error::OutOfRegisters(RegisterScope::Temp)) + } + + /// Allocates a new temporary register. + pub(crate) fn alloc(&mut self) -> Result { + let temp; + let new_next_temp; + { + let mut next_temp = self.next_temp.borrow_mut(); + temp = *next_temp; + self.ntemps += 1; + new_next_temp = match next_temp.checked_add(1) { + Some(reg) => reg, + None => return Err(Error::OutOfRegisters(RegisterScope::Temp)), + }; + *next_temp = new_next_temp; + } + + { + let mut count_temps = self.count_temps.borrow_mut(); + *count_temps = max(*count_temps, new_next_temp); + } + + match u8::try_from(usize::from(self.nlocals) + usize::from(temp)) { + Ok(reg) => { + Ok(Register::local(reg).map_err(|_| Error::OutOfRegisters(RegisterScope::Temp))?) + } + Err(_) => Err(Error::OutOfRegisters(RegisterScope::Temp)), + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::CallableMetadataBuilder; + + #[test] + fn test_symbol_key_case_insensitive() { + assert_eq!(SymbolKey::from("foo"), SymbolKey::from("FOO")); + assert_eq!(SymbolKey::from("Foo"), SymbolKey::from("fOo")); + } + + #[test] + fn test_symbol_key_display() { + assert_eq!("FOO", format!("{}", SymbolKey::from("foo"))); + } + + #[test] + fn test_global_put_and_get() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + + let reg = + global.put_global(SymbolKey::from("x"), SymbolPrototype::Scalar(ExprType::Integer))?; + assert_eq!(Register::global(0).unwrap(), reg); + + let reg = + global.put_global(SymbolKey::from("y"), SymbolPrototype::Scalar(ExprType::Text))?; + assert_eq!(Register::global(1).unwrap(), reg); + + // Lookup with untyped ref succeeds. + let (reg, proto) = global.get_global(&VarRef::new("x", None))?; + assert_eq!(Register::global(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Integer), proto); + + // Lookup with matching typed ref succeeds. + let (reg, proto) = global.get_global(&VarRef::new("y", Some(ExprType::Text)))?; + assert_eq!(Register::global(1).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Text), proto); + + Ok(()) + } + + #[test] + fn test_global_get_case_insensitive() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + global.put_global(SymbolKey::from("MyVar"), SymbolPrototype::Scalar(ExprType::Double))?; + + let (reg, proto) = global.get_global(&VarRef::new("myvar", None))?; + assert_eq!(Register::global(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Double), proto); + + let (reg2, _) = global.get_global(&VarRef::new("MYVAR", None))?; + assert_eq!(reg, reg2); + Ok(()) + } + + #[test] + fn test_global_get_incompatible_type() { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + global + .put_global(SymbolKey::from("x"), SymbolPrototype::Scalar(ExprType::Integer)) + .unwrap(); + + let err = global.get_global(&VarRef::new("x", Some(ExprType::Text))).unwrap_err(); + assert_eq!("Incompatible type annotation in x$ reference", err.to_string()); + } + + #[test] + fn test_global_get_undefined() { + let upcalls = HashMap::default(); + let global = GlobalSymtable::new(upcalls); + + let err = global.get_global(&VarRef::new("x", None)).unwrap_err(); + assert_eq!("Undefined global symbol x", err.to_string()); + } + + #[test] + fn test_local_put_and_get() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + let reg = + local.put_local(SymbolKey::from("a"), SymbolPrototype::Scalar(ExprType::Boolean))?; + assert_eq!(Register::local(0).unwrap(), reg); + + let reg = + local.put_local(SymbolKey::from("b"), SymbolPrototype::Scalar(ExprType::Double))?; + assert_eq!(Register::local(1).unwrap(), reg); + + let (reg, proto) = local.get_local_or_global(&VarRef::new("a", None))?; + assert_eq!(Register::local(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Boolean), proto); + + Ok(()) + } + + #[test] + fn test_local_shadows_global() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + global.put_global(SymbolKey::from("x"), SymbolPrototype::Scalar(ExprType::Integer))?; + + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("x"), SymbolPrototype::Scalar(ExprType::Text))?; + + let (reg, proto) = local.get_local_or_global(&VarRef::new("x", None))?; + assert_eq!(Register::local(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Text), proto); + + Ok(()) + } + + #[test] + fn test_local_falls_through_to_global() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + global.put_global(SymbolKey::from("g"), SymbolPrototype::Scalar(ExprType::Integer))?; + + let local = global.enter_scope(); + let (reg, proto) = local.get_local_or_global(&VarRef::new("g", None))?; + assert_eq!(Register::global(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Integer), proto); + + Ok(()) + } + + #[test] + fn test_local_get_undefined() { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let local = global.enter_scope(); + + let err = local.get_local_or_global(&VarRef::new("nope", None)).unwrap_err(); + assert_eq!("Undefined global symbol nope", err.to_string()); + } + + #[test] + fn test_local_put_global_through_local() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + let reg = + local.put_global(SymbolKey::from("g"), SymbolPrototype::Scalar(ExprType::Integer))?; + assert_eq!(Register::global(0).unwrap(), reg); + + // Should be visible from the local scope via fallthrough. + let (reg, proto) = local.get_local_or_global(&VarRef::new("g", None))?; + assert_eq!(Register::global(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Integer), proto); + + Ok(()) + } + + #[test] + fn test_fixup_local_type() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + local.put_local(SymbolKey::from("x"), SymbolPrototype::Scalar(ExprType::Integer))?; + local.fixup_local_type(&VarRef::new("x", None), ExprType::Double)?; + + let (_, proto) = local.get_local_or_global(&VarRef::new("x", None))?; + assert_eq!(SymbolPrototype::Scalar(ExprType::Double), proto); + + Ok(()) + } + + #[test] + fn test_fixup_local_type_undefined() { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + let err = + local.fixup_local_type(&VarRef::new("nope", None), ExprType::Integer).unwrap_err(); + assert_eq!("Undefined local symbol nope", err.to_string()); + } + + #[test] + fn test_define_and_get_user_callable() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + + let md = CallableMetadataBuilder::new("MY_FUNC") + .with_return_type(ExprType::Integer) + .test_build(); + global.declare_user_callable(&VarRef::new("my_func", None), md)?; + + let found = global.get_callable(&SymbolKey::from("my_func")); + assert!(found.is_some()); + assert_eq!("MY_FUNC", found.unwrap().name()); + + Ok(()) + } + + #[test] + fn test_define_user_callable_already_defined_but_is_compatible() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + + let md = CallableMetadataBuilder::new("DUP").test_build(); + global.declare_user_callable(&VarRef::new("dup", None), md)?; + + let md2 = CallableMetadataBuilder::new("DUP").test_build(); + global.declare_user_callable(&VarRef::new("dup", None), md2)?; + + Ok(()) + } + + #[test] + fn test_define_user_callable_already_defined_but_is_incompatible() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + + let md = CallableMetadataBuilder::new("DUP").test_build(); + global.declare_user_callable(&VarRef::new("dup", None), md)?; + + let md2 = + CallableMetadataBuilder::new("DUP").with_return_type(ExprType::Integer).test_build(); + let err = global.declare_user_callable(&VarRef::new("dup", None), md2).unwrap_err(); + assert_eq!("Cannot redefine dup", err.to_string()); + + Ok(()) + } + + #[test] + fn test_define_user_callable_via_local() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + let md = CallableMetadataBuilder::new("SUB1").test_build(); + local.declare_user_callable(&VarRef::new("sub1", None), md)?; + + let found = local.get_callable(&SymbolKey::from("sub1")); + assert!(found.is_some()); + + Ok(()) + } + + #[test] + fn test_get_callable_upcall() { + let key = SymbolKey::from("BUILTIN"); + let md = CallableMetadataBuilder::new("BUILTIN").test_build(); + let mut upcalls_map = HashMap::new(); + upcalls_map.insert(key, md); + + let global = GlobalSymtable::new(upcalls_map); + let found = global.get_callable(&SymbolKey::from("builtin")); + assert!(found.is_some()); + assert_eq!("BUILTIN", found.unwrap().name()); + } + + #[test] + fn test_user_callable_shadows_upcall() { + let key = SymbolKey::from("SHARED"); + let builtin_md = + CallableMetadataBuilder::new("SHARED").with_return_type(ExprType::Boolean).test_build(); + let mut upcalls_map = HashMap::new(); + upcalls_map.insert(key, builtin_md); + + let mut global = GlobalSymtable::new(upcalls_map); + let user_md = + CallableMetadataBuilder::new("SHARED").with_return_type(ExprType::Integer).test_build(); + global.declare_user_callable(&VarRef::new("shared", None), user_md).unwrap(); + + let found = global.get_callable(&SymbolKey::from("shared")).unwrap(); + assert_eq!(Some(ExprType::Integer), found.return_type()); + } + + #[test] + fn test_get_callable_not_found() { + let upcalls = HashMap::default(); + let global = GlobalSymtable::new(upcalls); + assert!(global.get_callable(&SymbolKey::from("nope")).is_none()); + } + + #[test] + fn test_temp_scope_first() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("a"), SymbolPrototype::Scalar(ExprType::Integer))?; + local.put_local(SymbolKey::from("b"), SymbolPrototype::Scalar(ExprType::Integer))?; + { + let temp = local.frozen(); + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(2).unwrap(), scope.first()?); + } + Ok(()) + } + + #[test] + fn test_temp_scope_first_no_locals() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + { + let temp = local.frozen(); + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(0).unwrap(), scope.first()?); + } + Ok(()) + } + + #[test] + fn test_temp_scope_first_with_outer_allocation() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("a"), SymbolPrototype::Scalar(ExprType::Integer))?; + { + let temp = local.frozen(); + let mut outer = temp.temp_scope(); + assert_eq!(Register::local(1).unwrap(), outer.alloc()?); + + let mut inner = temp.temp_scope(); + assert_eq!(Register::local(2).unwrap(), inner.first()?); + } + Ok(()) + } + + #[test] + fn test_temp_scope() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + assert_eq!( + Register::local(0).unwrap(), + local.put_local(SymbolKey::from("foo"), SymbolPrototype::Scalar(ExprType::Integer))? + ); + { + let temp = local.frozen(); + { + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(1).unwrap(), scope.alloc()?); + { + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(2).unwrap(), scope.alloc()?); + assert_eq!(Register::local(3).unwrap(), scope.alloc()?); + assert_eq!(Register::local(4).unwrap(), scope.alloc()?); + } + { + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(2).unwrap(), scope.alloc()?); + assert_eq!(Register::local(3).unwrap(), scope.alloc()?); + } + assert_eq!(Register::local(2).unwrap(), scope.alloc()?); + } + } + { + let temp = local.frozen(); + { + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(1).unwrap(), scope.alloc()?); + } + } + Ok(()) + } + + #[test] + fn test_with_reserved_temp_register_index() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("a"), SymbolPrototype::Scalar(ExprType::Integer))?; + local.put_local(SymbolKey::from("b"), SymbolPrototype::Scalar(ExprType::Integer))?; + + local.with_reserved_temp( + |e| e, + |reg, _| { + assert_eq!(Register::local(2).unwrap(), reg); + Ok(()) + }, + )?; + + Ok(()) + } + + #[test] + fn test_with_reserved_temp_shifts_temp_scope_base() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("a"), SymbolPrototype::Scalar(ExprType::Integer))?; + + local.with_reserved_temp( + |e| e, + |reserved, temp| { + assert_eq!(Register::local(1).unwrap(), reserved); + let mut scope = temp.temp_scope(); + assert_eq!(Register::local(2).unwrap(), scope.alloc()?); + Ok(()) + }, + )?; + + Ok(()) + } + + #[test] + fn test_with_reserved_temp_released_after_error() { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + let err = local + .with_reserved_temp( + |e| e, + |_, _| Err::<(), Error>(Error::OutOfRegisters(RegisterScope::Temp)), + ) + .unwrap_err(); + assert_eq!("Out of temp registers", err.to_string()); + + local + .with_reserved_temp( + |e| e, + |reg, _| { + assert_eq!(Register::local(0).unwrap(), reg); + Ok(()) + }, + ) + .unwrap(); + } + + #[test] + fn test_temp_scope_lookup_vars() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + global.put_global(SymbolKey::from("g"), SymbolPrototype::Scalar(ExprType::Integer))?; + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("l"), SymbolPrototype::Scalar(ExprType::Text))?; + + { + let temp = local.frozen(); + + let (reg, proto) = temp.get_local_or_global(&VarRef::new("l", None))?; + assert_eq!(Register::local(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Text), proto); + + let (reg, proto) = temp.get_local_or_global(&VarRef::new("g", None))?; + assert_eq!(Register::global(0).unwrap(), reg); + assert_eq!(SymbolPrototype::Scalar(ExprType::Integer), proto); + } + + Ok(()) + } + + #[test] + fn test_temp_scope_lookup_callable() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let md = CallableMetadataBuilder::new("FOO").test_build(); + global.declare_user_callable(&VarRef::new("foo", None), md)?; + + let mut local = global.enter_scope(); + { + let temp = local.frozen(); + assert!(temp.get_callable(&SymbolKey::from("foo")).is_some()); + assert!(temp.get_callable(&SymbolKey::from("nope")).is_none()); + } + + Ok(()) + } + + #[test] + fn test_multiple_scopes_independent_locals() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + + { + let mut local = global.enter_scope(); + local.put_local(SymbolKey::from("x"), SymbolPrototype::Scalar(ExprType::Integer))?; + } + + { + let mut local = global.enter_scope(); + // "x" should not exist in this new scope. + let err = local.get_local_or_global(&VarRef::new("x", None)).unwrap_err(); + assert_eq!("Undefined global symbol x", err.to_string()); + + let reg = + local.put_local(SymbolKey::from("y"), SymbolPrototype::Scalar(ExprType::Double))?; + assert_eq!(Register::local(0).unwrap(), reg); + } + + Ok(()) + } + + #[test] + fn test_global_put_and_get_array() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + + let reg = global.put_global( + SymbolKey::from("arr"), + SymbolPrototype::Array(ArrayInfo { subtype: ExprType::Integer, ndims: 2 }), + )?; + assert_eq!(Register::global(0).unwrap(), reg); + + let (got_reg, proto) = global.get_global(&VarRef::new("arr", None)).unwrap(); + assert_eq!(Register::global(0).unwrap(), got_reg); + let SymbolPrototype::Array(info) = proto else { panic!("Expected Array prototype") }; + assert_eq!(ExprType::Integer, info.subtype); + assert_eq!(2, info.ndims); + + Ok(()) + } + + #[test] + fn test_local_put_and_get_array() -> Result<()> { + let upcalls = HashMap::default(); + let mut global = GlobalSymtable::new(upcalls); + let mut local = global.enter_scope(); + + let reg = local.put_local( + SymbolKey::from("arr"), + SymbolPrototype::Array(ArrayInfo { subtype: ExprType::Double, ndims: 1 }), + )?; + assert_eq!(Register::local(0).unwrap(), reg); + + let (got_reg, proto) = local.get_local_or_global(&VarRef::new("arr", None)).unwrap(); + assert_eq!(Register::local(0).unwrap(), got_reg); + let SymbolPrototype::Array(info) = proto else { panic!("Expected Array prototype") }; + assert_eq!(ExprType::Double, info.subtype); + assert_eq!(1, info.ndims); + + Ok(()) + } +} diff --git a/core2/src/compiler/top.rs b/core2/src/compiler/top.rs new file mode 100644 index 00000000..55656816 --- /dev/null +++ b/core2/src/compiler/top.rs @@ -0,0 +1,1376 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Entry point to the compilation, handling top-level definitions. + +use crate::ast::{ + ArgSep, AssignmentSpan, CallableSpan, CaseGuardSpan, CaseRelOp, DoGuard, DoSpan, Expr, + ExprType, ForSpan, IfSpan, OnErrorSpan, SelectSpan, Statement, VarRef, WhileSpan, +}; +use crate::bytecode::{self, ErrorHandlerMode, PackedArrayType, Register}; +use crate::callable::{ArgSepSyntax, CallableMetadata, RequiredValueSyntax, SingularArgSyntax}; +use crate::compiler::args::{compile_args, define_new_args}; +use crate::compiler::codegen::{Codegen, Fixup}; +use crate::compiler::exprs::{compile_expr, compile_expr_as_type, compile_integer_exprs}; +use crate::compiler::syms::{ + self, GlobalSymtable, LocalSymtable, SymbolKey, SymbolPrototype, TempSymtable, +}; +use crate::compiler::{Error, Result}; +use crate::image::{GlobalVarInfo, Image, ImageDelta}; +use crate::mem::ConstantDatum; +use crate::reader::LineCol; +use crate::{Callable, CallableMetadataBuilder, parser}; +use std::borrow::Cow; +use std::cmp::max; +use std::collections::{HashMap, HashSet}; +use std::io; +use std::iter::Iterator; +use std::rc::Rc; + +use super::syms::LocalSymtableSnapshot; + +/// Kind of a user-defined callable. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +enum CallableKind { + /// A function definition. + Function, + + /// A subroutine definition. + Sub, +} + +/// Bag of state required by various top-level compilation functions. +/// +/// This type exists to minimize the number of complex arguments passed across functions. +/// If possible, avoid passing it and instead pass the minimum set of required fields. +#[derive(Clone, Default)] +pub(super) struct Context { + /// The code generator accumulating bytecode instructions. + codegen: Codegen, + + /// Collection of `DATA` values captured while compiling all statements. + data: Vec>, + + /// Stack of pending `EXIT DO` jumps for each nested `DO` loop. + do_exit_stack: Vec>, + + /// Stack of pending `EXIT FOR` jumps for each nested `FOR` loop. + for_exit_stack: Vec>, + + /// Kind of the callable currently being compiled, if any. + current_callable: Option, + + /// Callables defined (not just declared) so far. + defined_callables: HashSet, + + /// List of pending `EXIT FUNCTION` or `EXIT SUB` jumps in the current callable. + callable_exit_jumps: Vec<(usize, LineCol)>, +} + +/// Converts parser-validated `DATA` expressions into image data constants. +fn data_expr_to_constant(expr: Expr) -> ConstantDatum { + match expr { + Expr::Boolean(span) => ConstantDatum::Boolean(span.value), + Expr::Double(span) => ConstantDatum::Double(span.value), + Expr::Integer(span) => ConstantDatum::Integer(span.value), + Expr::Text(span) => ConstantDatum::Text(span.value), + _ => unreachable!("Parser guarantees DATA only contains literal values"), + } +} + +/// Returns a statically-known `END` exit code and its source position, if any. +fn static_end_code(expr: &Expr) -> Option<(i32, LineCol)> { + match expr { + Expr::Integer(span) => Some((span.value, span.pos)), + Expr::Negate(span) => { + let Expr::Integer(inner) = &span.expr else { + return None; + }; + inner.value.checked_neg().map(|value| (value, span.pos)) + } + _ => None, + } +} + +/// Compiles an assignment statement `span` into the `codegen` block. +fn compile_assignment( + codegen: &mut Codegen, + symtable: &mut LocalSymtable<'_>, + span: AssignmentSpan, +) -> Result<()> { + let vref_pos = span.vref_pos; + + let (reg, etype) = match symtable.get_local_or_global(&span.vref) { + Ok((_, SymbolPrototype::Array(_))) => { + return Err(Error::ArrayUsedAsScalar(vref_pos, span.vref)); + } + + Ok((reg, SymbolPrototype::Scalar(etype))) => (reg, Some(etype)), + + Err(syms::Error::UndefinedSymbol(..)) => { + let key = SymbolKey::from(span.vref.name.clone()); + if symtable.get_callable(&key).is_some() { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(span.vref.clone()), + span.vref_pos, + )); + } + let reg = symtable + .put_local( + key, + SymbolPrototype::Scalar(span.vref.ref_type.unwrap_or(ExprType::Integer)), + ) + .map_err(|e| Error::from_syms(e, span.vref_pos))?; + match span.vref.ref_type { + Some(etype) => (reg, Some(etype)), + None => (reg, None), + } + } + + Err(e) => return Err(Error::from_syms(e, vref_pos)), + }; + + if let Some(etype) = etype { + // The destination variable already exists. Try to compile the expression into its target + // type and fail otherwise with a better error message. + match compile_expr_as_type(codegen, &mut symtable.frozen(), reg, span.expr, etype) { + Err(Error::TypeMismatch(pos, actual, expected)) => { + return Err(Error::IncompatibleTypesInAssignment(pos, actual, expected)); + } + r => return r, + } + } + + // The destination variable doesn't exist yet but `symtable.put_local` already inserted it + // with the default type we gave above as part of assigning it a register. Use the + // expression's type to fix up the type in the symbols table. + let etype = compile_expr(codegen, &mut symtable.frozen(), reg, span.expr)?; + symtable.fixup_local_type(&span.vref, etype).map_err(|e| Error::from_syms(e, vref_pos)) +} + +/// Returns the textual name of `relop` for diagnostics. +fn case_relop_name(relop: &CaseRelOp) -> &'static str { + match relop { + CaseRelOp::Equal => "=", + CaseRelOp::NotEqual => "<>", + CaseRelOp::Less => "<", + CaseRelOp::LessEqual => "<=", + CaseRelOp::Greater => ">", + CaseRelOp::GreaterEqual => ">=", + } +} + +/// Returns the bytecode opcode constructor for `relop` and operands of type `etype`. +fn case_relop_instr( + relop: &CaseRelOp, + etype: ExprType, +) -> Option u32> { + match etype { + ExprType::Boolean => match relop { + CaseRelOp::Equal => Some(bytecode::make_equal_boolean), + CaseRelOp::NotEqual => Some(bytecode::make_not_equal_boolean), + CaseRelOp::Less + | CaseRelOp::LessEqual + | CaseRelOp::Greater + | CaseRelOp::GreaterEqual => None, + }, + + ExprType::Double => match relop { + CaseRelOp::Equal => Some(bytecode::make_equal_double), + CaseRelOp::NotEqual => Some(bytecode::make_not_equal_double), + CaseRelOp::Less => Some(bytecode::make_less_double), + CaseRelOp::LessEqual => Some(bytecode::make_less_equal_double), + CaseRelOp::Greater => Some(bytecode::make_greater_double), + CaseRelOp::GreaterEqual => Some(bytecode::make_greater_equal_double), + }, + + ExprType::Integer => match relop { + CaseRelOp::Equal => Some(bytecode::make_equal_integer), + CaseRelOp::NotEqual => Some(bytecode::make_not_equal_integer), + CaseRelOp::Less => Some(bytecode::make_less_integer), + CaseRelOp::LessEqual => Some(bytecode::make_less_equal_integer), + CaseRelOp::Greater => Some(bytecode::make_greater_integer), + CaseRelOp::GreaterEqual => Some(bytecode::make_greater_equal_integer), + }, + + ExprType::Text => match relop { + CaseRelOp::Equal => Some(bytecode::make_equal_text), + CaseRelOp::NotEqual => Some(bytecode::make_not_equal_text), + CaseRelOp::Less => Some(bytecode::make_less_text), + CaseRelOp::LessEqual => Some(bytecode::make_less_equal_text), + CaseRelOp::Greater => Some(bytecode::make_greater_text), + CaseRelOp::GreaterEqual => Some(bytecode::make_greater_equal_text), + }, + } +} + +/// Compiles a comparison between `test` and `rhs`, leaving the boolean result in `dest`. +fn compile_case_relop( + ctx: &mut Context, + pos: LineCol, + test: (Register, ExprType), + rhs: (Register, ExprType), + relop: CaseRelOp, + dest: Register, +) -> Result<()> { + let (test_reg, test_type) = test; + let (rhs_reg, rhs_type) = rhs; + let op_name = case_relop_name(&relop); + let opcode = match (test_type, rhs_type) { + (ExprType::Double, ExprType::Integer) => { + ctx.codegen.emit(bytecode::make_integer_to_double(rhs_reg), pos); + case_relop_instr(&relop, ExprType::Double) + } + + (ExprType::Integer, ExprType::Double) => { + ctx.codegen.emit(bytecode::make_integer_to_double(test_reg), pos); + case_relop_instr(&relop, ExprType::Double) + } + + (lhs, rhs) if lhs == rhs => case_relop_instr(&relop, lhs), + _ => None, + }; + + match opcode { + Some(opcode) => { + ctx.codegen.emit(opcode(dest, test_reg, rhs_reg), pos); + Ok(()) + } + None => Err(Error::BinaryOpType(pos, op_name, test_type, rhs_type)), + } +} + +/// Compiles one `CASE` guard and returns the register and source position of its boolean result. +fn compile_case_guard( + ctx: &mut Context, + symtable: &mut TempSymtable<'_, '_>, + test_reg: Register, + test_type: ExprType, + guard: CaseGuardSpan, +) -> Result<(Register, LineCol)> { + match guard { + CaseGuardSpan::Is(relop, expr) => { + let pos = expr.start_pos(); + + let mut scope = symtable.temp_scope(); + let lhs_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + let rhs_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + let cond_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + + ctx.codegen.emit(bytecode::make_move(lhs_reg, test_reg), pos); + let rhs_type = compile_expr(&mut ctx.codegen, symtable, rhs_reg, expr)?; + compile_case_relop( + ctx, + pos, + (lhs_reg, test_type), + (rhs_reg, rhs_type), + relop, + cond_reg, + )?; + + Ok((cond_reg, pos)) + } + + CaseGuardSpan::To(from_expr, to_expr) => { + let pos = from_expr.start_pos(); + + let mut scope = symtable.temp_scope(); + let lhs_from_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + let rhs_from_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + let cond_from_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + + let lhs_to_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + let rhs_to_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + let cond_to_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + + let cond_reg = scope.alloc().map_err(|e| Error::from_syms(e, pos))?; + + ctx.codegen.emit(bytecode::make_move(lhs_from_reg, test_reg), pos); + let rhs_from_type = compile_expr(&mut ctx.codegen, symtable, rhs_from_reg, from_expr)?; + compile_case_relop( + ctx, + pos, + (lhs_from_reg, test_type), + (rhs_from_reg, rhs_from_type), + CaseRelOp::GreaterEqual, + cond_from_reg, + )?; + + ctx.codegen.emit(bytecode::make_move(lhs_to_reg, test_reg), pos); + let rhs_to_type = compile_expr(&mut ctx.codegen, symtable, rhs_to_reg, to_expr)?; + compile_case_relop( + ctx, + pos, + (lhs_to_reg, test_type), + (rhs_to_reg, rhs_to_type), + CaseRelOp::LessEqual, + cond_to_reg, + )?; + + ctx.codegen.emit(bytecode::make_bitwise_and(cond_reg, cond_from_reg, cond_to_reg), pos); + Ok((cond_reg, pos)) + } + } +} + +/// Compiles a `SELECT` statement and emits bytecode into `ctx`. +fn compile_select( + ctx: &mut Context, + symtable: &mut LocalSymtable<'_>, + span: SelectSpan, +) -> Result<()> { + let end_pos = span.end_pos; + let ncases = span.cases.len(); + let select_cases = span.cases; + let select_expr = span.expr; + let select_expr_pos = select_expr.start_pos(); + + struct PendingCase { + body: Vec, + body_jump_pcs: Vec<(usize, LineCol)>, + has_next_case: bool, + } + + let mut pending_cases = Vec::with_capacity(ncases); + let mut pending_next_case_jump: Option<(usize, LineCol)> = None; + + symtable.with_reserved_temp( + |e| Error::from_syms(e, select_expr_pos), + |test_reg, frozen| { + let test_type = compile_expr(&mut ctx.codegen, frozen, test_reg, select_expr)?; + + for (i, case) in select_cases.into_iter().enumerate() { + let has_next_case = i < ncases - 1; + let mut body_jump_pcs = vec![]; + let case_dispatch_addr = ctx.codegen.next_pc(); + if let Some((jump_pc, pos)) = pending_next_case_jump.take() { + let target = u16::try_from(case_dispatch_addr) + .map_err(|_| Error::TargetTooFar(pos, case_dispatch_addr))?; + ctx.codegen.patch(jump_pc, bytecode::make_jump(target)); + } + + if case.guards.is_empty() { + let jump_body_pc = ctx.codegen.emit(bytecode::make_nop(), end_pos); + body_jump_pcs.push((jump_body_pc, end_pos)); + } else { + for guard in case.guards { + let (cond_reg, pos) = + compile_case_guard(ctx, frozen, test_reg, test_type, guard)?; + let jump_next_guard_pc = ctx.codegen.emit(bytecode::make_nop(), pos); + let jump_body_pc = ctx.codegen.emit(bytecode::make_nop(), pos); + body_jump_pcs.push((jump_body_pc, pos)); + + let next_addr = ctx.codegen.next_pc(); + let target = u16::try_from(next_addr) + .map_err(|_| Error::TargetTooFar(pos, next_addr))?; + ctx.codegen.patch( + jump_next_guard_pc, + bytecode::make_jump_if_false(cond_reg, target), + ); + } + + let jump_next_case_pc = ctx.codegen.emit(bytecode::make_nop(), end_pos); + pending_next_case_jump = Some((jump_next_case_pc, end_pos)); + } + + pending_cases.push(PendingCase { body: case.body, body_jump_pcs, has_next_case }); + } + + Ok(()) + }, + )?; + + let dispatch_end_jump_pc = ctx.codegen.emit(bytecode::make_nop(), end_pos); + if let Some((jump_pc, pos)) = pending_next_case_jump { + let target = u16::try_from(dispatch_end_jump_pc) + .map_err(|_| Error::TargetTooFar(pos, dispatch_end_jump_pc))?; + ctx.codegen.patch(jump_pc, bytecode::make_jump(target)); + } + + let mut end_jumps = vec![]; + for case in pending_cases { + let body_addr = ctx.codegen.next_pc(); + for (jump_body_pc, pos) in case.body_jump_pcs { + let target = + u16::try_from(body_addr).map_err(|_| Error::TargetTooFar(pos, body_addr))?; + ctx.codegen.patch(jump_body_pc, bytecode::make_jump(target)); + } + + for stmt in case.body { + compile_stmt(ctx, symtable, stmt)?; + } + + if case.has_next_case { + end_jumps.push(ctx.codegen.emit(bytecode::make_nop(), end_pos)); + } + } + + let end_addr = ctx.codegen.next_pc(); + let end_target = u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(end_pos, end_addr))?; + ctx.codegen.patch(dispatch_end_jump_pc, bytecode::make_jump(end_target)); + for end_jump in end_jumps { + ctx.codegen.patch(end_jump, bytecode::make_jump(end_target)); + } + + Ok(()) +} + +/// Compiles a `DO` loop and emits bytecode into `ctx`. +fn compile_do(ctx: &mut Context, symtable: &mut LocalSymtable<'_>, span: DoSpan) -> Result<()> { + fn compile_guard( + ctx: &mut Context, + symtable: &mut LocalSymtable<'_>, + guard: Expr, + ) -> Result<(Register, LineCol)> { + let guard_pos = guard.start_pos(); + let mut frozen = symtable.frozen(); + let mut scope = frozen.temp_scope(); + let reg = scope.alloc().map_err(|e| Error::from_syms(e, guard_pos))?; + compile_expr_as_type(&mut ctx.codegen, &mut frozen, reg, guard, ExprType::Boolean)?; + Ok((reg, guard_pos)) + } + + ctx.do_exit_stack.push(vec![]); + + let end_addr = match span.guard { + DoGuard::Infinite => { + let start_pc = ctx.codegen.next_pc(); + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + let end_pos = LineCol { line: 0, col: 0 }; + let target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(end_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump(target), end_pos); + ctx.codegen.next_pc() + } + + DoGuard::PreUntil(guard) => { + let start_pc = ctx.codegen.next_pc(); + let (cond_reg, guard_pos) = compile_guard(ctx, symtable, guard)?; + let jump_body_pc = ctx.codegen.emit(bytecode::make_nop(), guard_pos); + let jump_end_pc = ctx.codegen.emit(bytecode::make_nop(), guard_pos); + let body_addr = ctx.codegen.next_pc(); + let body_target = + u16::try_from(body_addr).map_err(|_| Error::TargetTooFar(guard_pos, body_addr))?; + ctx.codegen.patch(jump_body_pc, bytecode::make_jump_if_false(cond_reg, body_target)); + + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + let start_target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(guard_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump(start_target), guard_pos); + let end_addr = ctx.codegen.next_pc(); + let end_target = + u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(guard_pos, end_addr))?; + ctx.codegen.patch(jump_end_pc, bytecode::make_jump(end_target)); + end_addr + } + + DoGuard::PreWhile(guard) => { + let start_pc = ctx.codegen.next_pc(); + let (cond_reg, guard_pos) = compile_guard(ctx, symtable, guard)?; + let jump_end_pc = ctx.codegen.emit(bytecode::make_nop(), guard_pos); + + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + let start_target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(guard_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump(start_target), guard_pos); + let end_addr = ctx.codegen.next_pc(); + let end_target = + u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(guard_pos, end_addr))?; + ctx.codegen.patch(jump_end_pc, bytecode::make_jump_if_false(cond_reg, end_target)); + end_addr + } + + DoGuard::PostUntil(guard) => { + let start_pc = ctx.codegen.next_pc(); + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + let (cond_reg, guard_pos) = compile_guard(ctx, symtable, guard)?; + let start_target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(guard_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump_if_false(cond_reg, start_target), guard_pos); + ctx.codegen.next_pc() + } + + DoGuard::PostWhile(guard) => { + let start_pc = ctx.codegen.next_pc(); + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + let (cond_reg, guard_pos) = compile_guard(ctx, symtable, guard)?; + let jump_end_pc = ctx.codegen.emit(bytecode::make_nop(), guard_pos); + let start_target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(guard_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump(start_target), guard_pos); + let end_addr = ctx.codegen.next_pc(); + let end_target = + u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(guard_pos, end_addr))?; + ctx.codegen.patch(jump_end_pc, bytecode::make_jump_if_false(cond_reg, end_target)); + end_addr + } + }; + + let exit_jumps = ctx.do_exit_stack.pop().expect("Must have a matching DO scope"); + for (addr, pos) in exit_jumps { + let end_target = u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(pos, end_addr))?; + ctx.codegen.patch(addr, bytecode::make_jump(end_target)); + } + + Ok(()) +} + +/// Compiles a `FOR` loop and emits bytecode into `ctx`. +fn compile_for(ctx: &mut Context, symtable: &mut LocalSymtable<'_>, span: ForSpan) -> Result<()> { + if span.iter_double && span.iter.ref_type.is_none() { + match symtable.get_local_or_global(&span.iter) { + Ok(..) => { + // Keep existing iterators as-is. This mirrors core behavior where implicit + // widening to DOUBLE only happens when the iterator does not exist yet. + } + + Err(syms::Error::UndefinedSymbol(..)) => { + let key = SymbolKey::from(&span.iter.name); + if symtable.get_callable(&key).is_some() { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(span.iter.clone()), + span.iter_pos, + )); + } + symtable + .put_local(key, SymbolPrototype::Scalar(ExprType::Double)) + .map_err(|e| Error::from_syms(e, span.iter_pos))?; + } + + Err(e) => return Err(Error::from_syms(e, span.iter_pos)), + } + } + + compile_assignment( + &mut ctx.codegen, + symtable, + AssignmentSpan { vref: span.iter.clone(), vref_pos: span.iter_pos, expr: span.start }, + )?; + + let start_pc = ctx.codegen.next_pc(); + let (jump_end_pc, cond_reg, cond_pos) = { + let cond_pos = span.end.start_pos(); + let mut frozen = symtable.frozen(); + let mut scope = frozen.temp_scope(); + let reg = scope.alloc().map_err(|e| Error::from_syms(e, cond_pos))?; + compile_expr_as_type(&mut ctx.codegen, &mut frozen, reg, span.end, ExprType::Boolean)?; + (ctx.codegen.emit(bytecode::make_nop(), cond_pos), reg, cond_pos) + }; + + ctx.for_exit_stack.push(vec![]); + + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + + compile_assignment( + &mut ctx.codegen, + symtable, + AssignmentSpan { vref: span.iter, vref_pos: span.iter_pos, expr: span.next }, + )?; + + let start_target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(cond_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump(start_target), cond_pos); + + let end_addr = ctx.codegen.next_pc(); + let end_target = + u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(cond_pos, end_addr))?; + ctx.codegen.patch(jump_end_pc, bytecode::make_jump_if_false(cond_reg, end_target)); + + let exit_jumps = ctx.for_exit_stack.pop().expect("Must have a matching FOR scope"); + for (addr, pos) in exit_jumps { + let end_target = u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(pos, end_addr))?; + ctx.codegen.patch(addr, bytecode::make_jump(end_target)); + } + + Ok(()) +} + +/// Compiles an `IF` statement `span` into the `ctx`. +fn compile_if(ctx: &mut Context, symtable: &mut LocalSymtable<'_>, span: IfSpan) -> Result<()> { + let mut end_pcs: Vec = vec![]; + let nbranches = span.branches.len(); + + for (i, branch) in span.branches.into_iter().enumerate() { + let is_last = i == nbranches - 1; + let guard_pos = branch.guard.start_pos(); + + let (jump_pc, cond_reg) = { + let mut frozen = symtable.frozen(); + let mut scope = frozen.temp_scope(); + let reg = scope.alloc().map_err(|e| Error::from_syms(e, guard_pos))?; + compile_expr_as_type( + &mut ctx.codegen, + &mut frozen, + reg, + branch.guard, + ExprType::Boolean, + )?; + (ctx.codegen.emit(bytecode::make_nop(), guard_pos), reg) + }; + + for stmt in branch.body { + compile_stmt(ctx, symtable, stmt)?; + } + + if !is_last { + let end_pc = ctx.codegen.emit(bytecode::make_nop(), guard_pos); + end_pcs.push(end_pc); + } + + let next_addr = ctx.codegen.next_pc(); + let target = + u16::try_from(next_addr).map_err(|_| Error::TargetTooFar(guard_pos, next_addr))?; + ctx.codegen.patch(jump_pc, bytecode::make_jump_if_false(cond_reg, target)); + } + + let end_addr = ctx.codegen.next_pc(); + for end_pc in end_pcs { + let end_target = u16::try_from(end_addr) + .map_err(|_| Error::TargetTooFar(LineCol { line: 0, col: 0 }, end_addr))?; + ctx.codegen.patch(end_pc, bytecode::make_jump(end_target)); + } + + Ok(()) +} + +/// Compiles a `WHILE` loop and emits bytecode into `ctx`. +fn compile_while( + ctx: &mut Context, + symtable: &mut LocalSymtable<'_>, + span: WhileSpan, +) -> Result<()> { + let start_pc = ctx.codegen.next_pc(); + + let (jump_end_pc, cond_reg, guard_pos) = { + let guard_pos = span.expr.start_pos(); + let mut frozen = symtable.frozen(); + let mut scope = frozen.temp_scope(); + let reg = scope.alloc().map_err(|e| Error::from_syms(e, guard_pos))?; + compile_expr_as_type(&mut ctx.codegen, &mut frozen, reg, span.expr, ExprType::Boolean)?; + (ctx.codegen.emit(bytecode::make_nop(), guard_pos), reg, guard_pos) + }; + + for stmt in span.body { + compile_stmt(ctx, symtable, stmt)?; + } + + let start_target = + u16::try_from(start_pc).map_err(|_| Error::TargetTooFar(guard_pos, start_pc))?; + ctx.codegen.emit(bytecode::make_jump(start_target), guard_pos); + + let end_addr = ctx.codegen.next_pc(); + let end_target = + u16::try_from(end_addr).map_err(|_| Error::TargetTooFar(guard_pos, end_addr))?; + ctx.codegen.patch(jump_end_pc, bytecode::make_jump_if_false(cond_reg, end_target)); + + Ok(()) +} + +/// Compiles a single `stmt` into the `ctx`. +fn compile_stmt( + ctx: &mut Context, + symtable: &mut LocalSymtable<'_>, + stmt: Statement, +) -> Result<()> { + let start_pc = ctx.codegen.next_pc(); + let mut mark_start = true; + match stmt { + Statement::ArrayAssignment(span) => { + let key_pos = span.vref_pos; + + let (arr_reg, info) = match symtable.get_local_or_global(&span.vref) { + Ok((reg, SymbolPrototype::Array(info))) => (reg, info), + + Ok((_, SymbolPrototype::Scalar(_))) | Err(syms::Error::UndefinedSymbol(..)) => { + return Err(Error::NotAnArray(key_pos, span.vref)); + } + + Err(e) => return Err(Error::from_syms(e, key_pos)), + }; + + if span.subscripts.len() != info.ndims { + return Err(Error::WrongNumberOfSubscripts( + key_pos, + info.ndims, + span.subscripts.len(), + )); + } + + let mut symtable = symtable.frozen(); + let mut outer_scope = symtable.temp_scope(); + + let val_reg = outer_scope.alloc().map_err(|e| Error::from_syms(e, key_pos))?; + compile_expr_as_type( + &mut ctx.codegen, + &mut symtable, + val_reg, + span.expr, + info.subtype, + )?; + + let first_sub_reg = compile_integer_exprs( + &mut ctx.codegen, + &mut symtable, + &mut outer_scope, + key_pos, + span.subscripts.into_iter(), + )?; + ctx.codegen.emit(bytecode::make_store_array(arr_reg, val_reg, first_sub_reg), key_pos); + } + + Statement::Assignment(span) => { + compile_assignment(&mut ctx.codegen, symtable, span)?; + } + + Statement::Call(span) => { + let key = SymbolKey::from(&span.vref.name); + let key_pos = span.vref_pos; + + let Some(md) = symtable.get_callable(&key) else { + return Err(Error::UndefinedSymbol(key_pos, span.vref.clone())); + }; + if md.return_type().is_some() { + return Err(Error::NotAFunction(span.vref_pos, span.vref)); + } + let is_user_defined = md.is_user_defined(); + let md = md.clone(); + + define_new_args(&span, &md, symtable, &mut ctx.codegen)?; + let (first_temp, arg_linecols) = { + let mut symtable = symtable.frozen(); + compile_args(span, md, &mut symtable, &mut ctx.codegen)? + }; + + if is_user_defined { + let addr = ctx.codegen.emit(bytecode::make_nop(), key_pos); + ctx.codegen.set_arg_linecols(addr, arg_linecols); + ctx.codegen.add_fixup(addr, Fixup::Call(first_temp, key)); + } else { + let upcall = ctx.codegen.get_upcall(key, None, key_pos)?; + let addr = ctx.codegen.emit(bytecode::make_upcall(upcall, first_temp), key_pos); + ctx.codegen.set_arg_linecols(addr, arg_linecols); + } + } + + Statement::Callable(span) => { + mark_start = false; + declare_callable(symtable, &span.name, span.name_pos, &span.params)?; + + let key = SymbolKey::from(&span.name.name); + // If declaration succeeds, we still have to check for callable redefinition. + // This linear scan is not the most efficient, but it's fine for now. + if ctx.defined_callables.contains(&key) { + return Err(Error::AlreadyDefined(span.name_pos, span.name)); + } + compile_user_callable(ctx, symtable.global(), span)?; + ctx.defined_callables.insert(key); + } + + Statement::Data(span) => { + ctx.data.extend(span.values.into_iter().map(|expr| expr.map(data_expr_to_constant))); + } + + Statement::Declare(span) => { + mark_start = false; + if ctx.current_callable.is_some() { + return Err(Error::CannotNestUserCallables(span.name_pos)); + } + declare_callable(symtable, &span.name, span.name_pos, &span.params)?; + } + + Statement::Dim(span) => { + let name_pos = span.name_pos; + let key = SymbolKey::from(&span.name); + + if symtable.get_callable(&key).is_some() { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(VarRef::new(&span.name, None)), + name_pos, + )); + } + + let reg = if span.shared { + if symtable.contains_global(&key) { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(VarRef::new(&span.name, None)), + name_pos, + )); + } + symtable.put_global(key, SymbolPrototype::Scalar(span.vtype)) + } else { + if symtable.contains_local(&key) { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(VarRef::new(&span.name, None)), + name_pos, + )); + } + symtable.put_local(key, SymbolPrototype::Scalar(span.vtype)) + } + .map_err(|e| Error::from_syms(e, name_pos))?; + ctx.codegen.emit_default(reg, span.vtype, name_pos); + } + + Statement::DimArray(span) => { + let name_pos = span.name_pos; + let key = SymbolKey::from(&span.name); + let ndims = span.dimensions.len(); + + if symtable.get_callable(&key).is_some() { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(VarRef::new(&span.name, None)), + name_pos, + )); + } + + let info = syms::ArrayInfo { subtype: span.subtype, ndims }; + let reg = if span.shared { + if symtable.contains_global(&key) { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(VarRef::new(&span.name, None)), + name_pos, + )); + } + symtable.put_global(key, SymbolPrototype::Array(info)) + } else { + if symtable.contains_local(&key) { + return Err(Error::from_syms( + syms::Error::AlreadyDefined(VarRef::new(&span.name, None)), + name_pos, + )); + } + symtable.put_local(key, SymbolPrototype::Array(info)) + } + .map_err(|e| Error::from_syms(e, name_pos))?; + + let mut symtable = symtable.frozen(); + let mut outer_scope = symtable.temp_scope(); + + let first_dim_reg = compile_integer_exprs( + &mut ctx.codegen, + &mut symtable, + &mut outer_scope, + name_pos, + span.dimensions.into_iter(), + )?; + let packed = PackedArrayType::new(span.subtype, ndims) + .map_err(|_| Error::TooManyArrayDimensions(span.name_pos, ndims))?; + ctx.codegen.emit(bytecode::make_alloc_array(reg, packed, first_dim_reg), name_pos); + } + + Statement::Do(span) => { + compile_do(ctx, symtable, span)?; + } + + Statement::End(span) => { + if let Some(expr) = span.code.as_ref() + && let Some((code, code_pos)) = static_end_code(expr) + && let Err(e) = bytecode::ExitCode::try_from(code) + { + return Err(Error::from_bytecode_invalid_exit_code(e, code_pos)); + } + + let mut symtable = symtable.frozen(); + let mut scope = symtable.temp_scope(); + let reg = scope.alloc().map_err(|e| Error::from_syms(e, span.pos))?; + match span.code { + Some(expr) => { + compile_expr_as_type( + &mut ctx.codegen, + &mut symtable, + reg, + expr, + ExprType::Integer, + )?; + } + None => { + ctx.codegen.emit(bytecode::make_load_integer(reg, 0), span.pos); + } + } + ctx.codegen.emit(bytecode::make_end(reg), span.pos); + } + + Statement::ExitDo(span) => { + let Some(exit_stack) = ctx.do_exit_stack.last_mut() else { + return Err(Error::MisplacedExit(span.pos, "DO")); + }; + let addr = ctx.codegen.emit(bytecode::make_nop(), span.pos); + exit_stack.push((addr, span.pos)); + } + + Statement::ExitFor(span) => { + let Some(exit_stack) = ctx.for_exit_stack.last_mut() else { + return Err(Error::MisplacedExit(span.pos, "FOR")); + }; + let addr = ctx.codegen.emit(bytecode::make_nop(), span.pos); + exit_stack.push((addr, span.pos)); + } + + Statement::ExitFunction(span) => { + if ctx.current_callable != Some(CallableKind::Function) { + return Err(Error::MisplacedExit(span.pos, "FUNCTION")); + } + let addr = ctx.codegen.emit(bytecode::make_nop(), span.pos); + ctx.callable_exit_jumps.push((addr, span.pos)); + } + + Statement::ExitSub(span) => { + if ctx.current_callable != Some(CallableKind::Sub) { + return Err(Error::MisplacedExit(span.pos, "SUB")); + } + let addr = ctx.codegen.emit(bytecode::make_nop(), span.pos); + ctx.callable_exit_jumps.push((addr, span.pos)); + } + + Statement::For(span) => { + compile_for(ctx, symtable, span)?; + } + + Statement::Gosub(span) => { + let addr = ctx.codegen.emit(bytecode::make_nop(), span.target_pos); + ctx.codegen.add_fixup(addr, Fixup::Gosub(span.target)); + } + + Statement::Goto(span) => { + let addr = ctx.codegen.emit(bytecode::make_nop(), span.target_pos); + ctx.codegen.add_fixup(addr, Fixup::Goto(span.target)); + } + + Statement::Label(span) => { + mark_start = false; + if !ctx.codegen.define_label(SymbolKey::from(&span.name), ctx.codegen.next_pc()) { + return Err(Error::DuplicateLabel(span.name_pos, span.name)); + } + } + + Statement::Return(span) => { + ctx.codegen.emit(bytecode::make_return(), span.pos); + } + + Statement::If(span) => { + compile_if(ctx, symtable, span)?; + } + + Statement::OnError(span) => { + match span { + OnErrorSpan::Goto(span, pos) => { + let addr = ctx.codegen.emit(bytecode::make_nop(), pos); + ctx.codegen.add_fixup(addr, Fixup::OnErrorGoto(span.target)); + } + OnErrorSpan::Reset(pos) => { + ctx.codegen + .emit(bytecode::make_set_error_handler(ErrorHandlerMode::None, 0), pos); + } + OnErrorSpan::ResumeNext(pos) => { + ctx.codegen.emit( + bytecode::make_set_error_handler(ErrorHandlerMode::ResumeNext, 0), + pos, + ); + } + }; + } + + Statement::Select(span) => { + compile_select(ctx, symtable, span)?; + } + + Statement::While(span) => { + compile_while(ctx, symtable, span)?; + } + } + if mark_start && start_pc != ctx.codegen.next_pc() { + ctx.codegen.mark_statement_start(start_pc); + } + Ok(()) +} + +/// Declares a callable. +/// +/// If the callable is already defined, this ensures the new declaration matches the previous one +/// and raises an error if not. +fn declare_callable( + symtable: &mut LocalSymtable, + name: &VarRef, + name_pos: LineCol, + params: &[VarRef], +) -> Result<()> { + let mut syntax = vec![]; + for (i, param) in params.iter().enumerate() { + let sep = if i == params.len() - 1 { + ArgSepSyntax::End + } else { + ArgSepSyntax::Exactly(ArgSep::Long) + }; + syntax.push(SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Owned(param.name.to_owned()), + vtype: param.ref_type.unwrap_or(ExprType::Integer), + }, + sep, + )); + } + + let mut builder = CallableMetadataBuilder::new_dynamic(name.name.to_owned()) + .with_dynamic_syntax(vec![(syntax, None)]); + if let Some(ctype) = name.ref_type { + builder = builder.with_return_type(ctype); + } + + symtable.declare_user_callable(name, builder.build()).map_err(|e| Error::from_syms(e, name_pos)) +} + +/// Compiles a single user-defined callable. +fn compile_user_callable( + ctx: &mut Context, + symtable: &mut GlobalSymtable, + callable: CallableSpan, +) -> Result<()> { + if ctx.current_callable.is_some() { + return Err(Error::CannotNestUserCallables(callable.name_pos)); + } + + let skip_pc = ctx.codegen.emit(bytecode::make_nop(), callable.name_pos); + + let start_pc = ctx.codegen.next_pc(); + + let key_pos = callable.name_pos; + let key = SymbolKey::from(callable.name.name); + ctx.current_callable = Some(if callable.name.ref_type.is_some() { + CallableKind::Function + } else { + CallableKind::Sub + }); + debug_assert!(ctx.callable_exit_jumps.is_empty()); + + let mut symtable = symtable.enter_scope(); + + // The call protocol expects the return value to be in the first local variable + // so allocate it early, and then all arguments follow in order from left to right. + if let Some(vtype) = callable.name.ref_type { + let ret_reg = symtable + .put_local(key.clone(), SymbolPrototype::Scalar(vtype)) + .map_err(|e| Error::from_syms(e, key_pos))?; + + // Set the default value of the function result. We could instead try to do this + // at runtime by clearning the return register... but the problem is that we need + // to handle non-primitive types like strings and the runtime doesn't know the type + // of the result to properly allocate it. + let value = match vtype { + ExprType::Boolean | ExprType::Integer => 0, + ExprType::Double => ctx.codegen.get_constant(ConstantDatum::Double(0.0), key_pos)?, + ExprType::Text => { + ctx.codegen.get_constant(ConstantDatum::Text(String::new()), key_pos)? + } + }; + ctx.codegen.emit(bytecode::make_load_integer(ret_reg, value), key_pos); + } + for param in callable.params { + let key = SymbolKey::from(param.name); + symtable + .put_local( + key.clone(), + SymbolPrototype::Scalar(param.ref_type.unwrap_or(ExprType::Integer)), + ) + .map_err(|e| Error::from_syms(e, key_pos))?; + } + + for stmt in callable.body { + compile_stmt(ctx, &mut symtable, stmt)?; + } + + let return_addr = ctx.codegen.emit(bytecode::make_return(), callable.end_pos); + for (addr, pos) in ctx.callable_exit_jumps.drain(..) { + let target = + u16::try_from(return_addr).map_err(|_| Error::TargetTooFar(pos, return_addr))?; + ctx.codegen.patch(addr, bytecode::make_jump(target)); + } + ctx.current_callable = None; + let skip_addr = ctx.codegen.next_pc(); + ctx.codegen.define_user_callable(key, start_pc, skip_addr); + + let target = + u16::try_from(skip_addr).map_err(|_| Error::TargetTooFar(callable.end_pos, skip_addr))?; + ctx.codegen.patch(skip_pc, bytecode::make_jump(target)); + + Ok(()) +} + +/// Extracts the metadata of all provided `upcalls`. +pub fn only_metadata( + upcalls_by_name: &HashMap>, +) -> HashMap> { + let mut upcalls = HashMap::with_capacity(upcalls_by_name.len()); + for (name, callable) in upcalls_by_name { + upcalls.insert(name.clone(), callable.metadata()); + } + upcalls +} + +/// Descriptor for a single global variable to be pre-defined before compilation. +#[derive(Clone)] +pub struct GlobalDef { + /// Name of the variable (case-insensitive, as in EndBASIC). + pub name: String, + + /// Kind and type information for the variable. + pub kind: GlobalDefKind, +} + +/// Kind of a pre-defined global variable. +#[derive(Clone)] +pub enum GlobalDefKind { + /// A scalar (non-array) variable. + Scalar { + /// Type of the scalar variable. + etype: ExprType, + + /// Initial value for the variable. If `None`, the variable is initialized to its default + /// value: `0` for numeric types and an empty string for `Text`. The type of the datum + /// must match `etype`. + initial_value: Option, + }, + + /// A multidimensional array with the given element type and fixed dimension sizes. + /// + /// Each dimension size must be positive and must fit in a `u16`. + Array { + /// Element type of the array. + subtype: ExprType, + + /// Size of each dimension, in order from outermost to innermost. + dimensions: Vec, + }, +} + +/// Prepares global variables injected from outside of the compiled program. +/// +/// Pre-defined scalar globals are initialized to their default values (0 for numeric types, +/// empty string for text). Pre-defined array globals are allocated with all elements set to +/// their default values. The compiled program may read or write any of these globals. +/// +/// After execution, use `Vm::get_global*` methods to query the values of these globals (and +/// any globals declared via `DIM SHARED` in the program itself). +pub(super) fn prepare_globals( + ctx: &mut Context, + symtable: &mut GlobalSymtable, + global_defs: &[GlobalDef], +) -> Result<()> { + let preamble_pos = LineCol { line: 0, col: 0 }; + + // Register all global defs in the symbol table and collect array globals for the preamble. + let mut max_ndims: u8 = 0; + let mut array_globals: Vec<(Register, &GlobalDef)> = vec![]; + for def in global_defs { + let key = SymbolKey::from(&def.name); + match &def.kind { + GlobalDefKind::Array { subtype, dimensions } => { + let ndims = + u8::try_from(dimensions.len()).expect("Array must have at most 255 dimensions"); + let info = syms::ArrayInfo { subtype: *subtype, ndims: usize::from(ndims) }; + let reg = symtable + .put_global(key, SymbolPrototype::Array(info)) + .map_err(|e| Error::from_syms(e, preamble_pos))?; + max_ndims = max(max_ndims, ndims); + array_globals.push((reg, def)); + } + + GlobalDefKind::Scalar { etype, initial_value } => { + let reg = symtable + .put_global(key, SymbolPrototype::Scalar(*etype)) + .map_err(|e| Error::from_syms(e, preamble_pos))?; + match initial_value { + Some(datum) => { + if datum.etype() != *etype { + return Err(Error::TypeMismatch(preamble_pos, datum.etype(), *etype)); + } + ctx.codegen.emit_value(reg, datum.clone(), preamble_pos)?; + } + None => ctx.codegen.emit_default(reg, *etype, preamble_pos), + } + } + } + } + + // Emit the array initialization preamble, but only if any arrays were defined. + // + // We use a short-lived `ENTER/LEAVE` scope to borrow local registers for the dimension + // temporaries without permanently consuming global register slots. + if array_globals.is_empty() { + // `compile` starts by popping an EOF, so make sure there is one. + ctx.codegen.emit(bytecode::make_eof(), preamble_pos); + return Ok(()); + } + for (reg, def) in array_globals { + let GlobalDefKind::Array { subtype, dimensions } = &def.kind else { + unreachable!("array_globals only contains array defs per the loop above") + }; + + let ndims = u8::try_from(dimensions.len()).unwrap(); + for (i, &dim) in dimensions.iter().enumerate() { + let dim_u16 = + u16::try_from(dim).expect("Array dimension must fit in u16 for LOADI instruction"); + let local_reg = + Register::local(u8::try_from(i).unwrap()).expect("Dimension index fits in u8"); + ctx.codegen.emit(bytecode::make_load_integer(local_reg, dim_u16), preamble_pos); + } + + let first_dim_reg = Register::local(0).expect("Local register 0 is always valid"); + let packed = PackedArrayType::new(*subtype, usize::from(ndims)) + .map_err(|_| Error::TooManyArrayDimensions(preamble_pos, usize::from(ndims)))?; + ctx.codegen.emit(bytecode::make_alloc_array(reg, packed, first_dim_reg), preamble_pos); + } + + // `compile` starts by popping an EOF, so make sure there is one. + ctx.codegen.emit(bytecode::make_eof(), preamble_pos); + Ok(()) +} + +/// Compiles the `input` into an `Image` that can be executed by the VM. +pub fn compile( + input: &mut dyn io::Read, + image: &Image, + ctx: &mut Context, + mut symtable: LocalSymtable, +) -> Result<(ImageDelta, LocalSymtableSnapshot)> { + ctx.codegen.pop_eof(); + { + for stmt in parser::parse(input) { + compile_stmt(ctx, &mut symtable, stmt?)?; + } + } + ctx.codegen.emit(bytecode::make_eof(), LineCol { line: 0, col: 0 }); + + let global_vars = symtable + .iter_globals() + .map(|(key, proto, reg)| { + let (subtype, ndims) = match proto { + SymbolPrototype::Array(info) => (info.subtype, info.ndims), + SymbolPrototype::Scalar(etype) => (etype, 0), + }; + (key.clone(), GlobalVarInfo { reg, subtype, ndims }) + }) + .collect(); + let delta = ctx.codegen.build_image_delta(image, global_vars, &ctx.data)?; + Ok((delta, symtable.save())) +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::Compiler; + use crate::ast::ExprType; + use crate::mem::ConstantDatum; + use crate::vm::{StopReason, Vm}; + + fn compile_and_get_global(defs: &[GlobalDef], name: &str) -> ConstantDatum { + let compiler = Compiler::new(&HashMap::default(), defs) + .expect("constants initialization must succeed"); + let image = compiler.compile(&mut "".as_bytes()).expect("compilation should succeed"); + let mut vm = Vm::new(HashMap::default()); + match vm.exec(&image) { + StopReason::End(code) if code.is_success() => {} + StopReason::End(code) => panic!("unexpected exit code: {}", code.to_i32()), + StopReason::Eof => {} + StopReason::Exception(pos, msg) => panic!("exception at {pos}: {msg}"), + StopReason::Upcall(_) => panic!("unexpected upcall"), + } + let key = SymbolKey::from(name); + vm.get_global(&image, &key).expect("get_global failed").expect("global not found") + } + + #[test] + fn test_inject_boolean() { + let defs = vec![GlobalDef { + name: "b".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Boolean, + initial_value: Some(ConstantDatum::Boolean(true)), + }, + }]; + assert_eq!(ConstantDatum::Boolean(true), compile_and_get_global(&defs, "b")); + } + + #[test] + fn test_inject_integer() { + let defs = vec![GlobalDef { + name: "n".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Integer, + initial_value: Some(ConstantDatum::Integer(42)), + }, + }]; + assert_eq!(ConstantDatum::Integer(42), compile_and_get_global(&defs, "n")); + } + + #[test] + fn test_inject_integer_large() { + let defs = vec![GlobalDef { + name: "n".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Integer, + initial_value: Some(ConstantDatum::Integer(70000)), + }, + }]; + assert_eq!(ConstantDatum::Integer(70000), compile_and_get_global(&defs, "n")); + } + + #[test] + fn test_inject_double() { + let defs = vec![GlobalDef { + name: "d".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Double, + initial_value: Some(ConstantDatum::Double(1.5)), + }, + }]; + assert_eq!(ConstantDatum::Double(1.5), compile_and_get_global(&defs, "d")); + } + + #[test] + fn test_inject_text() { + let defs = vec![GlobalDef { + name: "s".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Text, + initial_value: Some(ConstantDatum::Text("hello".to_owned())), + }, + }]; + assert_eq!(ConstantDatum::Text("hello".to_owned()), compile_and_get_global(&defs, "s"),); + } + + #[test] + fn test_inject_type_mismatch() { + let defs = vec![GlobalDef { + name: "n".to_owned(), + kind: GlobalDefKind::Scalar { + etype: ExprType::Integer, + initial_value: Some(ConstantDatum::Double(1.5)), + }, + }]; + let result = Compiler::new(&HashMap::default(), &defs); + assert!(matches!(result, Err(Error::TypeMismatch(..)))); + } +} diff --git a/core2/src/image.rs b/core2/src/image.rs new file mode 100644 index 00000000..e7f2f29f --- /dev/null +++ b/core2/src/image.rs @@ -0,0 +1,294 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Compiled program representation. + +use crate::ast::ExprType; +use crate::bytecode::{self, Opcode, opcode_of}; +use crate::compiler::SymbolKey; +use crate::mem::ConstantDatum; +use crate::reader::LineCol; +use std::collections::HashMap; + +/// Formats an instruction for debugging. +/// +/// Panics if the instruction is malformed. +pub(crate) fn format_instr(instr: u32) -> String { + match opcode_of(instr) { + Opcode::AddDouble => bytecode::format_add_double(instr), + Opcode::AddInteger => bytecode::format_add_integer(instr), + Opcode::Alloc => bytecode::format_alloc(instr), + Opcode::AllocArray => bytecode::format_alloc_array(instr), + Opcode::BitwiseAnd => bytecode::format_bitwise_and(instr), + Opcode::BitwiseNot => bytecode::format_bitwise_not(instr), + Opcode::BitwiseOr => bytecode::format_bitwise_or(instr), + Opcode::BitwiseXor => bytecode::format_bitwise_xor(instr), + Opcode::Call => bytecode::format_call(instr), + Opcode::Concat => bytecode::format_concat(instr), + Opcode::DivideDouble => bytecode::format_divide_double(instr), + Opcode::DivideInteger => bytecode::format_divide_integer(instr), + Opcode::DoubleToInteger => bytecode::format_double_to_integer(instr), + Opcode::EqualBoolean => bytecode::format_equal_boolean(instr), + Opcode::EqualDouble => bytecode::format_equal_double(instr), + Opcode::EqualInteger => bytecode::format_equal_integer(instr), + Opcode::EqualText => bytecode::format_equal_text(instr), + Opcode::Eof => bytecode::format_eof(instr), + Opcode::End => bytecode::format_end(instr), + Opcode::Gosub => bytecode::format_gosub(instr), + Opcode::GreaterDouble => bytecode::format_greater_double(instr), + Opcode::GreaterEqualDouble => bytecode::format_greater_equal_double(instr), + Opcode::GreaterEqualInteger => bytecode::format_greater_equal_integer(instr), + Opcode::GreaterEqualText => bytecode::format_greater_equal_text(instr), + Opcode::GreaterInteger => bytecode::format_greater_integer(instr), + Opcode::GreaterText => bytecode::format_greater_text(instr), + Opcode::IntegerToDouble => bytecode::format_integer_to_double(instr), + Opcode::Jump => bytecode::format_jump(instr), + Opcode::JumpIfFalse => bytecode::format_jump_if_false(instr), + Opcode::LessDouble => bytecode::format_less_double(instr), + Opcode::LessEqualDouble => bytecode::format_less_equal_double(instr), + Opcode::LessEqualInteger => bytecode::format_less_equal_integer(instr), + Opcode::LessEqualText => bytecode::format_less_equal_text(instr), + Opcode::LessInteger => bytecode::format_less_integer(instr), + Opcode::LessText => bytecode::format_less_text(instr), + Opcode::LoadArray => bytecode::format_load_array(instr), + Opcode::LoadConstant => bytecode::format_load_constant(instr), + Opcode::LoadInteger => bytecode::format_load_integer(instr), + Opcode::LoadRegisterPointer => bytecode::format_load_register_ptr(instr), + Opcode::ModuloDouble => bytecode::format_modulo_double(instr), + Opcode::ModuloInteger => bytecode::format_modulo_integer(instr), + Opcode::Move => bytecode::format_move(instr), + Opcode::MultiplyDouble => bytecode::format_multiply_double(instr), + Opcode::MultiplyInteger => bytecode::format_multiply_integer(instr), + Opcode::NegateDouble => bytecode::format_negate_double(instr), + Opcode::NegateInteger => bytecode::format_negate_integer(instr), + Opcode::NotEqualBoolean => bytecode::format_not_equal_boolean(instr), + Opcode::NotEqualDouble => bytecode::format_not_equal_double(instr), + Opcode::NotEqualInteger => bytecode::format_not_equal_integer(instr), + Opcode::NotEqualText => bytecode::format_not_equal_text(instr), + Opcode::Nop => bytecode::format_nop(instr), + Opcode::PowerDouble => bytecode::format_power_double(instr), + Opcode::PowerInteger => bytecode::format_power_integer(instr), + Opcode::Return => bytecode::format_return(instr), + Opcode::SetErrorHandler => bytecode::format_set_error_handler(instr), + Opcode::ShiftLeft => bytecode::format_shift_left(instr), + Opcode::ShiftRight => bytecode::format_shift_right(instr), + Opcode::StoreArray => bytecode::format_store_array(instr), + Opcode::SubtractDouble => bytecode::format_subtract_double(instr), + Opcode::SubtractInteger => bytecode::format_subtract_integer(instr), + Opcode::Upcall => bytecode::format_upcall(instr), + } +} + +/// Information about a global variable tracked for post-execution querying. +#[derive(Clone, Debug, Eq, PartialEq)] +pub(crate) struct GlobalVarInfo { + /// Global register index (0 to `Register::MAX_GLOBAL - 1`). + pub(crate) reg: u8, + + /// Element type (for arrays, the element type; for scalars, the scalar type). + pub(crate) subtype: ExprType, + + /// Number of dimensions: 0 for scalars, >=1 for arrays. + pub(crate) ndims: usize, +} + +/// Per-instruction metadata stored in `DebugInfo`. +#[derive(Clone, Debug, Eq, PartialEq)] +pub(crate) struct InstrMetadata { + /// Source location that generated this instruction. + pub(crate) linecol: LineCol, + + /// True if this instruction is the start of a statement. + pub(crate) is_stmt_start: bool, + + /// Source locations of the call arguments, if this is a UPCALL instruction. + /// + /// Each entry corresponds to one register slot in the argument area, in the same order + /// that `compile_args` allocates them. Empty for all other instruction types. + pub(crate) arg_linecols: Vec, +} + +/// Debugging information for a compiled program. +#[derive(Default)] +pub struct DebugInfo { + /// Per-instruction metadata, one entry per instruction in the image's code. + pub(crate) instrs: Vec, + + /// Maps instruction addresses to the names of user-defined callables that start or end + /// at those addresses. If the boolean is true, the position is a callable start. + pub(crate) callables: HashMap, + + /// Maps global variable names to their register assignments and type information. + /// + /// This includes both host-pre-defined globals (from `compile_with_globals`) and + /// globals declared via `DIM SHARED` in the user's program. + pub(crate) global_vars: HashMap, +} + +/// Incremental update to append into an existing `Image`. +pub(crate) struct ImageDelta { + /// Suffix of bytecode instructions to append after dropping the current EOF terminator. + pub(crate) code: Vec, + + /// Additional upcall names referenced by the updated program. + pub(crate) upcalls: Vec, + + /// Additional constants referenced by the updated program. + pub(crate) constants: Vec, + + /// Additional `DATA` values captured by the updated program. + pub(crate) data: Vec>, + + /// Per-instruction metadata matching `code`. + pub(crate) instrs: Vec, + + /// Full user-callable metadata for the updated program. + pub(crate) callables: HashMap, + + /// Full global variable metadata for the updated program. + pub(crate) global_vars: HashMap, +} + +/// Representation of a compiled EndBASIC program. +/// +/// Images always have at least one instruction so that the VM can make this assumption. +pub struct Image { + /// The bytecode instructions of the compiled program. + pub(crate) code: Vec, + + /// Names of external callables referenced by the program, indexed by upcall ID. + pub(crate) upcalls: Vec, + + /// Pool of constant values used by the program. + pub(crate) constants: Vec, + + /// Values captured from all `DATA` statements in source order. + pub(crate) data: Vec>, + + /// Debugging information for error reporting and disassembly. + pub(crate) debug_info: DebugInfo, + + /// Marker to prevent external construction; ensures `code` is never empty. + _internal: (), +} + +impl Default for Image { + fn default() -> Self { + Self::new( + vec![ + // The minimum valid program requires an explicit terminator so that the VM knows + // to exit. + bytecode::make_eof(), + ], + vec![], + vec![], + vec![], + DebugInfo { + instrs: vec![InstrMetadata { + linecol: LineCol { line: 0, col: 0 }, + is_stmt_start: true, + arg_linecols: vec![], + }], + callables: HashMap::default(), + global_vars: HashMap::default(), + }, + ) + } +} + +impl Image { + pub(crate) fn new( + code: Vec, + upcalls: Vec, + constants: Vec, + data: Vec>, + debug_info: DebugInfo, + ) -> Self { + debug_assert!(!code.is_empty(), "Compiler must ensure the image is not empty"); + debug_assert_eq!(code.len(), debug_info.instrs.len()); + Self { code, upcalls, constants, data, debug_info, _internal: () } + } + + /// Appends `delta` to the image, replacing the current trailing EOF terminator. + pub(crate) fn append(&mut self, delta: ImageDelta) { + debug_assert_eq!(self.code.last().copied(), Some(bytecode::make_eof())); + debug_assert_eq!(self.debug_info.instrs.len(), self.code.len()); + debug_assert_eq!(delta.code.len(), delta.instrs.len()); + debug_assert_eq!(delta.code.last().copied(), Some(bytecode::make_eof())); + + self.code.pop(); + self.debug_info.instrs.pop(); + + self.code.extend(delta.code); + self.upcalls.extend(delta.upcalls); + self.constants.extend(delta.constants); + self.data.extend(delta.data); + self.debug_info.instrs.extend(delta.instrs); + self.debug_info.callables = delta.callables; + self.debug_info.global_vars = delta.global_vars; + } + + /// Disassembles the image into a textual representation for debugging. + pub fn disasm(&self) -> Vec { + let mut lines = Vec::with_capacity(self.code.len()); + + for ((i, instr), meta) in + self.code.iter().copied().enumerate().zip(self.debug_info.instrs.iter()) + { + let pos = meta.linecol; + if let Some((key, is_start)) = self.debug_info.callables.get(&i) { + if *is_start { + lines.push("".to_owned()); + lines.push(format!(";; {} (BEGIN)", key)); + } else { + lines.push(format!(";; {} (END)", key)); + lines.push("".to_owned()); + } + } + + let mut line = format!("{:04}: {}", i, format_instr(instr)); + + while line.len() < 40 { + line.push(' '); + } + line.push_str(&format!("; {}", pos)); + + match opcode_of(instr) { + Opcode::Call => { + let (_reg, target) = bytecode::parse_call(instr); + let target = usize::from(target); + let (name, _is_start) = self + .debug_info + .callables + .get(&target) + .expect("All CALL targets must be defined"); + line.push_str(&format!(", {}", name)) + } + + Opcode::Upcall => { + let (index, _first_reg) = bytecode::parse_upcall(instr); + let name = &self.upcalls[usize::from(index)]; + line.push_str(&format!(", {}", name)) + } + + _ => (), + } + + lines.push(line); + } + + lines + } +} diff --git a/core2/src/lexer.rs b/core2/src/lexer.rs new file mode 100644 index 00000000..42508927 --- /dev/null +++ b/core2/src/lexer.rs @@ -0,0 +1,1646 @@ +// EndBASIC +// Copyright 2020 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Tokenizer for the EndBASIC language. + +use crate::ast::{ExprType, VarRef}; +use crate::reader::{CharReader, CharSpan, LineCol}; +use std::{fmt, io}; + +/// Result type for the public methods of this module. +type Result = std::result::Result; + +/// Collection of valid tokens. +/// +/// Of special interest are the `Eof` and `Bad` tokens, both of which denote exceptional +/// conditions and require special care. `Eof` indicates that there are no more tokens. +/// `Bad` indicates that a token was bad and contains the reason behind the problem, but the +/// stream remains valid for extraction of further tokens. +#[derive(Clone, PartialEq)] +#[cfg_attr(test, derive(Debug))] +pub enum Token { + Eof, + Eol, + Bad(String), + + Boolean(bool), + Double(f64), + Integer(i32), + Text(String), + Symbol(VarRef), + + Label(String), + + Comma, + Semicolon, + LeftParen, + RightParen, + + Plus, + Minus, + Multiply, + Divide, + Modulo, + Exponent, + + Equal, + NotEqual, + Less, + LessEqual, + Greater, + GreaterEqual, + + And, + Not, + Or, + Xor, + + ShiftLeft, + ShiftRight, + + Case, + Data, + Declare, + Do, + Else, + Elseif, + End, + Error, + Exit, + For, + Function, + Gosub, + Goto, + If, + Is, + Loop, + Next, + On, + Resume, + Return, + Select, + Sub, + Step, + Then, + To, + Until, + Wend, + While, + + Dim, + Shared, + As, + BooleanName, + DoubleName, + IntegerName, + TextName, +} + +impl fmt::Display for Token { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + // This implementation of Display returns the "canonical format" of a token. We could + // instead capture the original text that was in the input stream and store it in the + // TokenSpan and return that. However, most BASIC implementations make input canonical + // so this helps achieve that goal. + match self { + Token::Eof => write!(f, "<>"), + Token::Eol => write!(f, "<>"), + Token::Bad(s) => write!(f, "<<{}>>", s), + + Token::Boolean(false) => write!(f, "FALSE"), + Token::Boolean(true) => write!(f, "TRUE"), + Token::Double(d) => write!(f, "{}", d), + Token::Integer(i) => write!(f, "{}", i), + Token::Text(t) => write!(f, "{}", t), + Token::Symbol(vref) => write!(f, "{}", vref), + + Token::Label(l) => write!(f, "@{}", l), + + Token::Comma => write!(f, ","), + Token::Semicolon => write!(f, ";"), + Token::LeftParen => write!(f, "("), + Token::RightParen => write!(f, ")"), + + Token::Plus => write!(f, "+"), + Token::Minus => write!(f, "-"), + Token::Multiply => write!(f, "*"), + Token::Divide => write!(f, "/"), + Token::Modulo => write!(f, "MOD"), + Token::Exponent => write!(f, "^"), + + Token::Equal => write!(f, "="), + Token::NotEqual => write!(f, "<>"), + Token::Less => write!(f, "<"), + Token::LessEqual => write!(f, "<="), + Token::Greater => write!(f, ">"), + Token::GreaterEqual => write!(f, ">="), + + Token::And => write!(f, "AND"), + Token::Not => write!(f, "NOT"), + Token::Or => write!(f, "OR"), + Token::Xor => write!(f, "XOR"), + + Token::ShiftLeft => write!(f, "<<"), + Token::ShiftRight => write!(f, ">>"), + + Token::Case => write!(f, "CASE"), + Token::Data => write!(f, "DATA"), + Token::Declare => write!(f, "DECLARE"), + Token::Do => write!(f, "DO"), + Token::Else => write!(f, "ELSE"), + Token::Elseif => write!(f, "ELSEIF"), + Token::End => write!(f, "END"), + Token::Error => write!(f, "ERROR"), + Token::Exit => write!(f, "EXIT"), + Token::For => write!(f, "FOR"), + Token::Function => write!(f, "FUNCTION"), + Token::Gosub => write!(f, "GOSUB"), + Token::Goto => write!(f, "GOTO"), + Token::If => write!(f, "IF"), + Token::Is => write!(f, "IS"), + Token::Loop => write!(f, "LOOP"), + Token::Next => write!(f, "NEXT"), + Token::On => write!(f, "ON"), + Token::Resume => write!(f, "RESUME"), + Token::Return => write!(f, "RETURN"), + Token::Select => write!(f, "SELECT"), + Token::Sub => write!(f, "SUB"), + Token::Step => write!(f, "STEP"), + Token::Then => write!(f, "THEN"), + Token::To => write!(f, "TO"), + Token::Until => write!(f, "UNTIL"), + Token::Wend => write!(f, "WEND"), + Token::While => write!(f, "WHILE"), + + Token::Dim => write!(f, "DIM"), + Token::Shared => write!(f, "SHARED"), + Token::As => write!(f, "AS"), + Token::BooleanName => write!(f, "BOOLEAN"), + Token::DoubleName => write!(f, "DOUBLE"), + Token::IntegerName => write!(f, "INTEGER"), + Token::TextName => write!(f, "STRING"), + } + } +} + +/// Extra operations to test properties of a `char` based on the language semantics. +trait CharOps { + /// Returns true if the current character should be considered as finishing a previous token. + fn is_separator(&self) -> bool; + + /// Returns true if the character is a space. + /// + /// Use this instead of `is_whitespace`, which accounts for newlines but we need to handle + /// those explicitly. + fn is_space(&self) -> bool; + + /// Returns true if the character can be part of an identifier. + fn is_word(&self) -> bool; +} + +impl CharOps for char { + fn is_separator(&self) -> bool { + match *self { + '\n' | ':' | '(' | ')' | '\'' | '=' | '<' | '>' | ';' | ',' | '+' | '-' | '*' | '/' + | '^' => true, + ch => ch.is_space(), + } + } + + fn is_space(&self) -> bool { + // TODO(jmmv): This is probably not correct regarding UTF-8 when comparing this function to + // the `is_whitespace` builtin. Figure out if that's true and what to do about it. + matches!(*self, ' ' | '\t' | '\r') + } + + fn is_word(&self) -> bool { + match *self { + '_' => true, + ch => ch.is_alphanumeric(), + } + } +} + +/// A token along with its position and length in the source. +/// +/// Note that the "context" is not truly available for some tokens such as `Token::Eof`, but we can +/// synthesize one for simplicity. Otherwise, we would need to extend the `Token` enum so that +/// every possible token contains extra fields, and that would be too complex. +#[cfg_attr(test, derive(PartialEq))] +pub struct TokenSpan { + /// The token itself. + pub(crate) token: Token, + + /// Start position of the token in the source. + pub(crate) pos: LineCol, + + /// Length of the token in characters. + #[allow(unused)] // TODO(jmmv): Use this in the parser. + length: usize, +} + +impl TokenSpan { + /// Creates a new `TokenSpan` from its parts. + fn new(token: Token, pos: LineCol, length: usize) -> Self { + Self { token, pos, length } + } +} + +/// Tokenizer that breaks an input stream into a sequence of language tokens. +pub struct Lexer<'a> { + /// Character reader for the input stream. + input: CharReader<'a>, +} + +impl<'a> Lexer<'a> { + /// Creates a new lexer from the given readable. + pub fn from(input: &'a mut dyn io::Read) -> Self { + Self { input: CharReader::from(input) } + } + + /// Handles an `input.next()` call that returned an unexpected character. + /// + /// This returns a `Token::Bad` with the provided `msg` and skips characters in the input + /// stream until a field separator is found. + fn handle_bad_read>( + &mut self, + msg: S, + first_pos: LineCol, + ) -> io::Result { + let mut len = 1; + loop { + match self.input.peek() { + Some(Ok(ch_span)) if ch_span.ch.is_separator() => break, + Some(Ok(_)) => { + self.input.next().unwrap()?; + len += 1; + } + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => break, + } + } + Ok(TokenSpan::new(Token::Bad(msg.into()), first_pos, len)) + } + + /// Consumes the number at the current position, whose first digit is `first`. + fn consume_number(&mut self, first: CharSpan) -> io::Result { + let mut s = String::new(); + let mut found_dot = false; + s.push(first.ch); + loop { + match self.input.peek() { + Some(Ok(ch_span)) => match ch_span.ch { + '.' => { + if found_dot { + self.input.next().unwrap()?; + return self + .handle_bad_read("Too many dots in numeric literal", first.pos); + } + s.push(self.input.next().unwrap()?.ch); + found_dot = true; + } + ch if ch.is_ascii_digit() => s.push(self.input.next().unwrap()?.ch), + ch if ch.is_separator() => break, + ch => { + self.input.next().unwrap()?; + let msg = format!("Unexpected character in numeric literal: {}", ch); + return self.handle_bad_read(msg, first.pos); + } + }, + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => break, + } + } + if found_dot { + if s.ends_with('.') { + // TODO(jmmv): Reconsider supporting double literals with a . that is not prefixed + // by a number or not followed by a number. For now, mimic the error we get when + // we encounter a dot not prefixed by a number. + return self.handle_bad_read("Unknown character: .", first.pos); + } + match s.parse::() { + Ok(d) => Ok(TokenSpan::new(Token::Double(d), first.pos, s.len())), + Err(e) => self.handle_bad_read(format!("Bad double {}: {}", s, e), first.pos), + } + } else { + match s.parse::() { + Ok(i) => Ok(TokenSpan::new(Token::Integer(i), first.pos, s.len())), + Err(e) => self.handle_bad_read(format!("Bad integer {}: {}", s, e), first.pos), + } + } + } + + /// Consumes the integer at the current position, whose first digit is `first` and which is + /// expected to be expressed in the given `base`. `prefix_len` indicates how many characters + /// were already consumed for this token, without counting `first`. + fn consume_integer( + &mut self, + base: u8, + pos: LineCol, + prefix_len: usize, + ) -> io::Result { + let mut s = String::new(); + loop { + match self.input.peek() { + Some(Ok(ch_span)) => match ch_span.ch { + '.' => { + self.input.next().unwrap()?; + return self + .handle_bad_read("Numbers in base syntax must be integers", pos); + } + ch if ch.is_ascii_digit() => s.push(self.input.next().unwrap()?.ch), + 'a'..='f' | 'A'..='F' => s.push(self.input.next().unwrap()?.ch), + ch if ch.is_separator() => break, + ch => { + self.input.next().unwrap()?; + let msg = format!("Unexpected character in numeric literal: {}", ch); + return self.handle_bad_read(msg, pos); + } + }, + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => break, + } + } + if s.is_empty() { + return self.handle_bad_read("No digits in integer literal", pos); + } + + match u32::from_str_radix(&s, u32::from(base)) { + Ok(i) => Ok(TokenSpan::new(Token::Integer(i as i32), pos, s.len() + prefix_len)), + Err(e) => self.handle_bad_read(format!("Bad integer {}: {}", s, e), pos), + } + } + + /// Consumes the integer at the current position `pos`. + fn consume_integer_with_base(&mut self, pos: LineCol) -> io::Result { + let mut prefix_len = 1; // Count '&'. + + let base = match self.input.peek() { + Some(Ok(ch_span)) => { + let base = match ch_span.ch { + 'b' | 'B' => 2, + 'd' | 'D' => 10, + 'o' | 'O' => 8, + 'x' | 'X' => 16, + ch if ch.is_separator() => { + return self.handle_bad_read("Missing base in integer literal", pos); + } + _ => { + let ch_span = self.input.next().unwrap()?; + return self.handle_bad_read( + format!("Unknown base {} in integer literal", ch_span.ch), + pos, + ); + } + }; + self.input.next().unwrap()?; + base + } + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => { + return self.handle_bad_read("Incomplete integer due to EOF", pos); + } + }; + prefix_len += 1; // Count the base. + + match self.input.peek() { + Some(Ok(ch_span)) if ch_span.ch == '_' => { + self.input.next().unwrap().unwrap(); + prefix_len += 1; // Count the '_'. + } + Some(Ok(_ch_span)) => (), + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => return self.handle_bad_read("Incomplete integer due to EOF", pos), + } + + self.consume_integer(base, pos, prefix_len) + } + + /// Consumes the operator at the current position, whose first character is `first`. + fn consume_operator(&mut self, first: CharSpan) -> io::Result { + match (first.ch, self.input.peek()) { + (_, Some(Err(_))) => Err(self.input.next().unwrap().unwrap_err()), + + ('<', Some(Ok(ch_span))) if ch_span.ch == '>' => { + self.input.next().unwrap()?; + Ok(TokenSpan::new(Token::NotEqual, first.pos, 2)) + } + + ('<', Some(Ok(ch_span))) if ch_span.ch == '=' => { + self.input.next().unwrap()?; + Ok(TokenSpan::new(Token::LessEqual, first.pos, 2)) + } + ('<', Some(Ok(ch_span))) if ch_span.ch == '<' => { + self.input.next().unwrap()?; + Ok(TokenSpan::new(Token::ShiftLeft, first.pos, 2)) + } + ('<', _) => Ok(TokenSpan::new(Token::Less, first.pos, 1)), + + ('>', Some(Ok(ch_span))) if ch_span.ch == '=' => { + self.input.next().unwrap()?; + Ok(TokenSpan::new(Token::GreaterEqual, first.pos, 2)) + } + ('>', Some(Ok(ch_span))) if ch_span.ch == '>' => { + self.input.next().unwrap()?; + Ok(TokenSpan::new(Token::ShiftRight, first.pos, 2)) + } + ('>', _) => Ok(TokenSpan::new(Token::Greater, first.pos, 1)), + + (_, _) => panic!("Should not have been called"), + } + } + + /// Consumes the symbol or keyword at the current position, whose first letter is `first`. + /// + /// The symbol may be a bare name, but it may also contain an optional type annotation. + fn consume_symbol(&mut self, first: CharSpan) -> io::Result { + let mut s = String::new(); + s.push(first.ch); + let mut vtype = None; + let mut token_len = 0; + loop { + match self.input.peek() { + Some(Ok(ch_span)) => match ch_span.ch { + ch if ch.is_word() => s.push(self.input.next().unwrap()?.ch), + ch if ch.is_separator() => break, + '?' => { + vtype = Some(ExprType::Boolean); + self.input.next().unwrap()?; + token_len += 1; + break; + } + '#' => { + vtype = Some(ExprType::Double); + self.input.next().unwrap()?; + token_len += 1; + break; + } + '%' => { + vtype = Some(ExprType::Integer); + self.input.next().unwrap()?; + token_len += 1; + break; + } + '$' => { + vtype = Some(ExprType::Text); + self.input.next().unwrap()?; + token_len += 1; + break; + } + ch => { + self.input.next().unwrap()?; + let msg = format!("Unexpected character in symbol: {}", ch); + return self.handle_bad_read(msg, first.pos); + } + }, + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => break, + } + } + debug_assert!(token_len <= 1); + + token_len += s.len(); + let token = match s.to_uppercase().as_str() { + "AND" => Token::And, + "AS" => Token::As, + "BOOLEAN" => Token::BooleanName, + "CASE" => Token::Case, + "DATA" => Token::Data, + "DECLARE" => Token::Declare, + "DIM" => Token::Dim, + "DO" => Token::Do, + "DOUBLE" => Token::DoubleName, + "ELSE" => Token::Else, + "ELSEIF" => Token::Elseif, + "END" => Token::End, + "ERROR" => Token::Error, + "EXIT" => Token::Exit, + "FALSE" => Token::Boolean(false), + "FOR" => Token::For, + "FUNCTION" => Token::Function, + "GOSUB" => Token::Gosub, + "GOTO" => Token::Goto, + "IF" => Token::If, + "IS" => Token::Is, + "INTEGER" => Token::IntegerName, + "LOOP" => Token::Loop, + "MOD" => Token::Modulo, + "NEXT" => Token::Next, + "NOT" => Token::Not, + "ON" => Token::On, + "OR" => Token::Or, + "REM" => return self.consume_rest_of_line(), + "RESUME" => Token::Resume, + "RETURN" => Token::Return, + "SELECT" => Token::Select, + "SHARED" => Token::Shared, + "STEP" => Token::Step, + "STRING" => Token::TextName, + "SUB" => Token::Sub, + "THEN" => Token::Then, + "TO" => Token::To, + "TRUE" => Token::Boolean(true), + "UNTIL" => Token::Until, + "WEND" => Token::Wend, + "WHILE" => Token::While, + "XOR" => Token::Xor, + _ => Token::Symbol(VarRef::new(s, vtype)), + }; + Ok(TokenSpan::new(token, first.pos, token_len)) + } + + /// Consumes the string at the current position, which was has to end with the same opening + /// character as specified by `delim`. + /// + /// This handles quoted characters within the string. + fn consume_text(&mut self, delim: CharSpan) -> io::Result { + let mut s = String::new(); + let mut escaping = false; + loop { + match self.input.peek() { + Some(Ok(ch_span)) => { + if escaping { + s.push(self.input.next().unwrap()?.ch); + escaping = false; + } else if ch_span.ch == '\\' { + self.input.next().unwrap()?; + escaping = true; + } else if ch_span.ch == delim.ch { + self.input.next().unwrap()?; + break; + } else { + s.push(self.input.next().unwrap()?.ch); + } + } + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => { + return self.handle_bad_read( + format!("Incomplete string due to EOF: {}", s), + delim.pos, + ); + } + } + } + let token_len = s.len() + 2; + Ok(TokenSpan::new(Token::Text(s), delim.pos, token_len)) + } + + /// Consumes the label definition at the current position. + fn consume_label(&mut self, first: CharSpan) -> io::Result { + let mut s = String::new(); + + match self.input.peek() { + Some(Ok(ch_span)) => match ch_span.ch { + ch if ch.is_word() && !ch.is_numeric() => s.push(self.input.next().unwrap()?.ch), + _ch => (), + }, + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => (), + } + if s.is_empty() { + return Ok(TokenSpan::new(Token::Bad("Empty label name".to_owned()), first.pos, 1)); + } + + loop { + match self.input.peek() { + Some(Ok(ch_span)) => match ch_span.ch { + ch if ch.is_word() => s.push(self.input.next().unwrap()?.ch), + ch if ch.is_separator() => break, + ch => { + let msg = format!("Unexpected character in label: {}", ch); + return self.handle_bad_read(msg, first.pos); + } + }, + Some(Err(_)) => return Err(self.input.next().unwrap().unwrap_err()), + None => break, + } + } + + let token_len = s.len() + 1; + Ok(TokenSpan::new(Token::Label(s), first.pos, token_len)) + } + + /// Consumes the remainder of the line and returns the token that was encountered at the end + /// (which may be EOF or end of line). + fn consume_rest_of_line(&mut self) -> io::Result { + loop { + match self.input.next() { + None => { + let last_pos = self.input.next_pos(); + return Ok(TokenSpan::new(Token::Eof, last_pos, 0)); + } + Some(Ok(ch_span)) if ch_span.ch == '\n' => { + return Ok(TokenSpan::new(Token::Eol, ch_span.pos, 1)); + } + Some(Err(e)) => return Err(e), + Some(Ok(_)) => (), + } + } + } + + /// Skips whitespace until it finds the beginning of the next token, and returns its first + /// character. + fn advance_and_read_next(&mut self) -> io::Result> { + loop { + match self.input.next() { + Some(Ok(ch_span)) if ch_span.ch.is_space() => (), + Some(Ok(ch_span)) => return Ok(Some(ch_span)), + Some(Err(e)) => return Err(e), + None => return Ok(None), + } + } + } + + /// Reads the next token from the input stream. + /// + /// Note that this returns errors only on fatal I/O conditions. EOF and malformed tokens are + /// both returned as the special token types `Token::Eof` and `Token::Bad` respectively. + pub fn read(&mut self) -> io::Result { + let ch_span = self.advance_and_read_next()?; + if ch_span.is_none() { + let last_pos = self.input.next_pos(); + return Ok(TokenSpan::new(Token::Eof, last_pos, 0)); + } + let ch_span = ch_span.unwrap(); + match ch_span.ch { + '\n' | ':' => Ok(TokenSpan::new(Token::Eol, ch_span.pos, 1)), + '\'' => self.consume_rest_of_line(), + + '"' => self.consume_text(ch_span), + + ';' => Ok(TokenSpan::new(Token::Semicolon, ch_span.pos, 1)), + ',' => Ok(TokenSpan::new(Token::Comma, ch_span.pos, 1)), + + '(' => Ok(TokenSpan::new(Token::LeftParen, ch_span.pos, 1)), + ')' => Ok(TokenSpan::new(Token::RightParen, ch_span.pos, 1)), + + '+' => Ok(TokenSpan::new(Token::Plus, ch_span.pos, 1)), + '-' => Ok(TokenSpan::new(Token::Minus, ch_span.pos, 1)), + '*' => Ok(TokenSpan::new(Token::Multiply, ch_span.pos, 1)), + '/' => Ok(TokenSpan::new(Token::Divide, ch_span.pos, 1)), + '^' => Ok(TokenSpan::new(Token::Exponent, ch_span.pos, 1)), + + '=' => Ok(TokenSpan::new(Token::Equal, ch_span.pos, 1)), + '<' | '>' => self.consume_operator(ch_span), + + '@' => self.consume_label(ch_span), + + '&' => self.consume_integer_with_base(ch_span.pos), + + ch if ch.is_ascii_digit() => self.consume_number(ch_span), + ch if ch.is_word() => self.consume_symbol(ch_span), + ch => self.handle_bad_read(format!("Unknown character: {}", ch), ch_span.pos), + } + } + + /// Returns a peekable adaptor for this lexer. + pub fn peekable(self) -> PeekableLexer<'a> { + PeekableLexer { lexer: self, peeked: None } + } +} + +/// A lexer wrapper that supports peeking at the next token without consuming it. +/// +/// Ideally, the `Lexer` would be an `Iterator` which would give us access to the standard +/// `Peekable` interface, but the ergonomics of that when dealing with a `Fallible` are less than +/// optimal. Hence we implement our own. +pub struct PeekableLexer<'a> { + /// The wrapped lexer instance. + lexer: Lexer<'a>, + + /// If not none, contains the token read by `peek`, which will be consumed by the next call + /// to `read` or `consume_peeked`. + peeked: Option, +} + +impl PeekableLexer<'_> { + /// Reads the previously-peeked token. + /// + /// Because `peek` reports read errors, this assumes that the caller already handled those + /// errors and is thus not going to call this when an error is present. + pub fn consume_peeked(&mut self) -> TokenSpan { + assert!(self.peeked.is_some()); + self.peeked.take().unwrap() + } + + /// Peeks the upcoming token. + /// + /// It is OK to call this function several times on the same token before extracting it from + /// the lexer. + pub fn peek(&mut self) -> Result<&TokenSpan> { + if self.peeked.is_none() { + let span = self.read()?; + self.peeked.replace(span); + } + Ok(self.peeked.as_ref().unwrap()) + } + + /// Reads the next token. + /// + /// If the next token is invalid and results in a read error, the stream will remain valid and + /// further tokens can be obtained with subsequent calls. + pub fn read(&mut self) -> Result { + match self.peeked.take() { + Some(t) => Ok(t), + None => match self.lexer.read() { + Ok(span) => Ok(span), + Err(e) => Err((self.lexer.input.next_pos(), e)), + }, + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use std::fmt; + + /// Syntactic sugar to instantiate a `TokenSpan` for testing. + fn ts(token: Token, line: usize, col: usize, length: usize) -> TokenSpan { + TokenSpan::new(token, LineCol { line, col }, length) + } + + impl fmt::Debug for TokenSpan { + /// Mimic the way we write the tests with the `ts` helper in `TokenSpan` dumps. + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!( + f, + "ts(Token::{:?}, {}, {}, {})", + self.token, self.pos.line, self.pos.col, self.length + ) + } + } + + /// Runs the lexer on the given `input` and expects the returned tokens to match + /// `exp_token_spans`. + fn do_ok_test(input: &str, exp_token_spans: &[TokenSpan]) { + let mut input = input.as_bytes(); + let mut lexer = Lexer::from(&mut input); + + let mut token_spans: Vec = vec![]; + let mut eof = false; + while !eof { + let token_span = lexer.read().expect("Lexing failed"); + eof = token_span.token == Token::Eof; + token_spans.push(token_span); + } + + assert_eq!(exp_token_spans, token_spans.as_slice()); + } + + #[test] + fn test_empty() { + let mut input = b"".as_ref(); + let mut lexer = Lexer::from(&mut input); + assert_eq!(Token::Eof, lexer.read().unwrap().token); + assert_eq!(Token::Eof, lexer.read().unwrap().token); + } + + #[test] + fn test_read_past_eof() { + do_ok_test("", &[ts(Token::Eof, 1, 1, 0)]); + } + + #[test] + fn test_whitespace_only() { + do_ok_test(" \t ", &[ts(Token::Eof, 1, 11, 0)]); + } + + #[test] + fn test_multiple_lines() { + do_ok_test( + " \n \t \n ", + &[ts(Token::Eol, 1, 4, 1), ts(Token::Eol, 2, 12, 1), ts(Token::Eof, 3, 3, 0)], + ); + do_ok_test( + " : \t : ", + &[ts(Token::Eol, 1, 4, 1), ts(Token::Eol, 1, 12, 1), ts(Token::Eof, 1, 15, 0)], + ); + } + + #[test] + fn test_tabs() { + do_ok_test("\t33", &[ts(Token::Integer(33), 1, 9, 2), ts(Token::Eof, 1, 11, 0)]); + do_ok_test( + "1234567\t8", + &[ + ts(Token::Integer(1234567), 1, 1, 7), + ts(Token::Integer(8), 1, 9, 1), + ts(Token::Eof, 1, 10, 0), + ], + ); + } + + /// Syntactic sugar to instantiate a `VarRef` without an explicit type annotation. + fn new_auto_symbol(name: &str) -> Token { + Token::Symbol(VarRef::new(name, None)) + } + + #[test] + fn test_some_tokens() { + do_ok_test( + "123 45 \n 6 3.012 abc a38z: a=3 with_underscores_1=_2", + &[ + ts(Token::Integer(123), 1, 1, 3), + ts(Token::Integer(45), 1, 5, 2), + ts(Token::Eol, 1, 8, 1), + ts(Token::Integer(6), 2, 2, 1), + ts(Token::Double(3.012), 2, 4, 5), + ts(new_auto_symbol("abc"), 2, 10, 3), + ts(new_auto_symbol("a38z"), 2, 14, 4), + ts(Token::Eol, 2, 18, 1), + ts(new_auto_symbol("a"), 2, 20, 1), + ts(Token::Equal, 2, 21, 1), + ts(Token::Integer(3), 2, 22, 1), + ts(new_auto_symbol("with_underscores_1"), 2, 24, 18), + ts(Token::Equal, 2, 42, 1), + ts(new_auto_symbol("_2"), 2, 43, 2), + ts(Token::Eof, 2, 45, 0), + ], + ); + } + + #[test] + fn test_boolean_literals() { + do_ok_test( + "true TRUE yes YES y false FALSE no NO n", + &[ + ts(Token::Boolean(true), 1, 1, 4), + ts(Token::Boolean(true), 1, 6, 4), + ts(new_auto_symbol("yes"), 1, 11, 3), + ts(new_auto_symbol("YES"), 1, 15, 3), + ts(new_auto_symbol("y"), 1, 19, 1), + ts(Token::Boolean(false), 1, 21, 5), + ts(Token::Boolean(false), 1, 27, 5), + ts(new_auto_symbol("no"), 1, 33, 2), + ts(new_auto_symbol("NO"), 1, 36, 2), + ts(new_auto_symbol("n"), 1, 39, 1), + ts(Token::Eof, 1, 40, 0), + ], + ); + } + + #[test] + fn test_integer_literals() { + do_ok_test( + "&b10 &B_10 &D10 &d_10 &o_10 &O_10 &X10 &x_10 &xabcdef &x0ABCDEF0 &x7a1", + &[ + ts(Token::Integer(2), 1, 1, 4), + ts(Token::Integer(2), 1, 6, 5), + ts(Token::Integer(10), 1, 12, 4), + ts(Token::Integer(10), 1, 17, 5), + ts(Token::Integer(8), 1, 23, 5), + ts(Token::Integer(8), 1, 29, 5), + ts(Token::Integer(16), 1, 35, 4), + ts(Token::Integer(16), 1, 40, 5), + ts(Token::Integer(11259375), 1, 46, 8), + ts(Token::Integer(180150000), 1, 55, 10), + ts(Token::Integer(1953), 1, 66, 5), + ts(Token::Eof, 1, 71, 0), + ], + ); + + do_ok_test( + "&b11111111111111111111111111111111 &xf0000000 &xffffffff", + &[ + ts(Token::Integer(-1), 1, 1, 34), + ts(Token::Integer(-268435456), 1, 36, 10), + ts(Token::Integer(-1), 1, 47, 10), + ts(Token::Eof, 1, 57, 0), + ], + ); + + do_ok_test( + "& &_ &__ &i10 &i_10 &d &d10.1 &b2 &da &o8 &xg", + &[ + ts(Token::Bad("Missing base in integer literal".to_owned()), 1, 1, 1), + ts(Token::Bad("Unknown base _ in integer literal".to_owned()), 1, 3, 1), + ts(Token::Bad("Unknown base _ in integer literal".to_owned()), 1, 6, 2), + ts(Token::Bad("Unknown base i in integer literal".to_owned()), 1, 10, 3), + ts(Token::Bad("Unknown base i in integer literal".to_owned()), 1, 15, 4), + ts(Token::Bad("No digits in integer literal".to_owned()), 1, 21, 1), + ts(Token::Bad("Numbers in base syntax must be integers".to_owned()), 1, 24, 2), + ts(Token::Bad("Bad integer 2: invalid digit found in string".to_owned()), 1, 31, 1), + ts(Token::Bad("Bad integer a: invalid digit found in string".to_owned()), 1, 35, 1), + ts(Token::Bad("Bad integer 8: invalid digit found in string".to_owned()), 1, 39, 1), + ts(Token::Bad("Unexpected character in numeric literal: g".to_owned()), 1, 43, 1), + ts(Token::Eof, 1, 46, 0), + ], + ); + + do_ok_test( + ">&< >&_< >&__< >&i10< >&i_10< >&d< >&d10.1<", + &[ + ts(Token::Greater, 1, 1, 1), + ts(Token::Bad("Missing base in integer literal".to_owned()), 1, 2, 1), + ts(Token::Less, 1, 3, 1), + // - + ts(Token::Greater, 1, 5, 1), + ts(Token::Bad("Unknown base _ in integer literal".to_owned()), 1, 6, 1), + ts(Token::Less, 1, 8, 1), + // - + ts(Token::Greater, 1, 10, 1), + ts(Token::Bad("Unknown base _ in integer literal".to_owned()), 1, 11, 2), + ts(Token::Less, 1, 14, 1), + // - + ts(Token::Greater, 1, 16, 1), + ts(Token::Bad("Unknown base i in integer literal".to_owned()), 1, 17, 3), + ts(Token::Less, 1, 21, 1), + // - + ts(Token::Greater, 1, 23, 1), + ts(Token::Bad("Unknown base i in integer literal".to_owned()), 1, 24, 4), + ts(Token::Less, 1, 29, 1), + // - + ts(Token::Greater, 1, 31, 1), + ts(Token::Bad("No digits in integer literal".to_owned()), 1, 32, 1), + ts(Token::Less, 1, 34, 1), + // - + ts(Token::Greater, 1, 36, 1), + ts(Token::Bad("Numbers in base syntax must be integers".to_owned()), 1, 37, 2), + ts(Token::Less, 1, 43, 1), + // - + ts(Token::Eof, 1, 44, 0), + ], + ); + } + + #[test] + fn test_utf8() { + do_ok_test( + "가 나=7 a다b \"라 마\"", + &[ + ts(new_auto_symbol("가"), 1, 1, 3), + ts(new_auto_symbol("나"), 1, 3, 3), + ts(Token::Equal, 1, 4, 1), + ts(Token::Integer(7), 1, 5, 1), + ts(new_auto_symbol("a다b"), 1, 7, 5), + ts(Token::Text("라 마".to_owned()), 1, 11, 9), + ts(Token::Eof, 1, 16, 0), + ], + ); + } + + #[test] + fn test_remarks() { + do_ok_test( + "REM This is a comment\nNOT 'This is another comment\n", + &[ + ts(Token::Eol, 1, 22, 1), + ts(Token::Not, 2, 1, 3), + ts(Token::Eol, 2, 29, 1), + ts(Token::Eof, 3, 1, 0), + ], + ); + + do_ok_test( + "REM This is a comment: and the colon doesn't yield Eol\nNOT 'Another: comment\n", + &[ + ts(Token::Eol, 1, 55, 1), + ts(Token::Not, 2, 1, 3), + ts(Token::Eol, 2, 22, 1), + ts(Token::Eof, 3, 1, 0), + ], + ); + } + + #[test] + fn test_var_types() { + do_ok_test( + "a b? d# i% s$", + &[ + ts(new_auto_symbol("a"), 1, 1, 1), + ts(Token::Symbol(VarRef::new("b", Some(ExprType::Boolean))), 1, 3, 2), + ts(Token::Symbol(VarRef::new("d", Some(ExprType::Double))), 1, 6, 2), + ts(Token::Symbol(VarRef::new("i", Some(ExprType::Integer))), 1, 9, 2), + ts(Token::Symbol(VarRef::new("s", Some(ExprType::Text))), 1, 12, 2), + ts(Token::Eof, 1, 14, 0), + ], + ); + } + + #[test] + fn test_strings() { + do_ok_test( + " \"this is a string\" 3", + &[ + ts(Token::Text("this is a string".to_owned()), 1, 2, 18), + ts(Token::Integer(3), 1, 22, 1), + ts(Token::Eof, 1, 23, 0), + ], + ); + + do_ok_test( + " \"this is a string with ; special : characters in it\"", + &[ + ts( + Token::Text("this is a string with ; special : characters in it".to_owned()), + 1, + 2, + 52, + ), + ts(Token::Eof, 1, 54, 0), + ], + ); + + do_ok_test( + "\"this \\\"is escaped\\\" \\\\ \\a\" 1", + &[ + ts(Token::Text("this \"is escaped\" \\ a".to_owned()), 1, 1, 23), + ts(Token::Integer(1), 1, 29, 1), + ts(Token::Eof, 1, 30, 0), + ], + ); + } + + #[test] + fn test_data() { + do_ok_test("DATA", &[ts(Token::Data, 1, 1, 4), ts(Token::Eof, 1, 5, 0)]); + + do_ok_test("data", &[ts(Token::Data, 1, 1, 4), ts(Token::Eof, 1, 5, 0)]); + + // Common BASIC interprets things like "2 + foo" as a single string but we interpret + // separate tokens. "Fixing" this to read data in the same way requires entering a + // separate lexing mode just for DATA statements, which is not very interesting. We can + // ask for strings to always be double-quoted. + do_ok_test( + "DATA 2 + foo", + &[ + ts(Token::Data, 1, 1, 4), + ts(Token::Integer(2), 1, 6, 1), + ts(Token::Plus, 1, 8, 1), + ts(new_auto_symbol("foo"), 1, 10, 3), + ts(Token::Eof, 1, 13, 0), + ], + ); + } + + #[test] + fn test_declare() { + do_ok_test("DECLARE", &[ts(Token::Declare, 1, 1, 7), ts(Token::Eof, 1, 8, 0)]); + + do_ok_test("declare", &[ts(Token::Declare, 1, 1, 7), ts(Token::Eof, 1, 8, 0)]); + } + + #[test] + fn test_dim() { + do_ok_test( + "DIM SHARED AS", + &[ + ts(Token::Dim, 1, 1, 3), + ts(Token::Shared, 1, 5, 6), + ts(Token::As, 1, 12, 2), + ts(Token::Eof, 1, 14, 0), + ], + ); + do_ok_test( + "BOOLEAN DOUBLE INTEGER STRING", + &[ + ts(Token::BooleanName, 1, 1, 7), + ts(Token::DoubleName, 1, 9, 6), + ts(Token::IntegerName, 1, 16, 7), + ts(Token::TextName, 1, 24, 6), + ts(Token::Eof, 1, 30, 0), + ], + ); + + do_ok_test( + "dim shared as", + &[ + ts(Token::Dim, 1, 1, 3), + ts(Token::Shared, 1, 5, 6), + ts(Token::As, 1, 12, 2), + ts(Token::Eof, 1, 14, 0), + ], + ); + do_ok_test( + "boolean double integer string", + &[ + ts(Token::BooleanName, 1, 1, 7), + ts(Token::DoubleName, 1, 9, 6), + ts(Token::IntegerName, 1, 16, 7), + ts(Token::TextName, 1, 24, 6), + ts(Token::Eof, 1, 30, 0), + ], + ); + } + + #[test] + fn test_do() { + do_ok_test( + "DO UNTIL WHILE EXIT LOOP", + &[ + ts(Token::Do, 1, 1, 2), + ts(Token::Until, 1, 4, 5), + ts(Token::While, 1, 10, 5), + ts(Token::Exit, 1, 16, 4), + ts(Token::Loop, 1, 21, 4), + ts(Token::Eof, 1, 25, 0), + ], + ); + + do_ok_test( + "do until while exit loop", + &[ + ts(Token::Do, 1, 1, 2), + ts(Token::Until, 1, 4, 5), + ts(Token::While, 1, 10, 5), + ts(Token::Exit, 1, 16, 4), + ts(Token::Loop, 1, 21, 4), + ts(Token::Eof, 1, 25, 0), + ], + ); + } + + #[test] + fn test_if() { + do_ok_test( + "IF THEN ELSEIF ELSE END IF", + &[ + ts(Token::If, 1, 1, 2), + ts(Token::Then, 1, 4, 4), + ts(Token::Elseif, 1, 9, 6), + ts(Token::Else, 1, 16, 4), + ts(Token::End, 1, 21, 3), + ts(Token::If, 1, 25, 2), + ts(Token::Eof, 1, 27, 0), + ], + ); + + do_ok_test( + "if then elseif else end if", + &[ + ts(Token::If, 1, 1, 2), + ts(Token::Then, 1, 4, 4), + ts(Token::Elseif, 1, 9, 6), + ts(Token::Else, 1, 16, 4), + ts(Token::End, 1, 21, 3), + ts(Token::If, 1, 25, 2), + ts(Token::Eof, 1, 27, 0), + ], + ); + } + + #[test] + fn test_for() { + do_ok_test( + "FOR TO STEP NEXT", + &[ + ts(Token::For, 1, 1, 3), + ts(Token::To, 1, 5, 2), + ts(Token::Step, 1, 8, 4), + ts(Token::Next, 1, 13, 4), + ts(Token::Eof, 1, 17, 0), + ], + ); + + do_ok_test( + "for to step next", + &[ + ts(Token::For, 1, 1, 3), + ts(Token::To, 1, 5, 2), + ts(Token::Step, 1, 8, 4), + ts(Token::Next, 1, 13, 4), + ts(Token::Eof, 1, 17, 0), + ], + ); + } + + #[test] + fn test_function() { + do_ok_test( + "FUNCTION FOO END FUNCTION", + &[ + ts(Token::Function, 1, 1, 8), + ts(Token::Symbol(VarRef::new("FOO", None)), 1, 10, 3), + ts(Token::End, 1, 14, 3), + ts(Token::Function, 1, 18, 8), + ts(Token::Eof, 1, 26, 0), + ], + ); + + do_ok_test( + "function foo end function", + &[ + ts(Token::Function, 1, 1, 8), + ts(Token::Symbol(VarRef::new("foo", None)), 1, 10, 3), + ts(Token::End, 1, 14, 3), + ts(Token::Function, 1, 18, 8), + ts(Token::Eof, 1, 26, 0), + ], + ); + } + + #[test] + fn test_gosub() { + do_ok_test("GOSUB", &[ts(Token::Gosub, 1, 1, 5), ts(Token::Eof, 1, 6, 0)]); + + do_ok_test("gosub", &[ts(Token::Gosub, 1, 1, 5), ts(Token::Eof, 1, 6, 0)]); + } + + #[test] + fn test_goto() { + do_ok_test("GOTO", &[ts(Token::Goto, 1, 1, 4), ts(Token::Eof, 1, 5, 0)]); + + do_ok_test("goto", &[ts(Token::Goto, 1, 1, 4), ts(Token::Eof, 1, 5, 0)]); + } + + #[test] + fn test_label() { + do_ok_test( + "@Foo123 @a @Z @_ok", + &[ + ts(Token::Label("Foo123".to_owned()), 1, 1, 7), + ts(Token::Label("a".to_owned()), 1, 9, 2), + ts(Token::Label("Z".to_owned()), 1, 12, 2), + ts(Token::Label("_ok".to_owned()), 1, 15, 4), + ts(Token::Eof, 1, 19, 0), + ], + ); + } + + #[test] + fn test_on_error() { + for s in ["ON ERROR GOTO @foo", "on error goto @foo"] { + do_ok_test( + s, + &[ + ts(Token::On, 1, 1, 2), + ts(Token::Error, 1, 4, 5), + ts(Token::Goto, 1, 10, 4), + ts(Token::Label("foo".to_owned()), 1, 15, 4), + ts(Token::Eof, 1, 19, 0), + ], + ); + } + + for s in ["ON ERROR RESUME NEXT", "on error resume next"] { + do_ok_test( + s, + &[ + ts(Token::On, 1, 1, 2), + ts(Token::Error, 1, 4, 5), + ts(Token::Resume, 1, 10, 6), + ts(Token::Next, 1, 17, 4), + ts(Token::Eof, 1, 21, 0), + ], + ); + } + } + + #[test] + fn test_return() { + do_ok_test("RETURN", &[ts(Token::Return, 1, 1, 6), ts(Token::Eof, 1, 7, 0)]); + + do_ok_test("return", &[ts(Token::Return, 1, 1, 6), ts(Token::Eof, 1, 7, 0)]); + } + + #[test] + fn test_select() { + do_ok_test( + "SELECT CASE IS ELSE END", + &[ + ts(Token::Select, 1, 1, 6), + ts(Token::Case, 1, 8, 4), + ts(Token::Is, 1, 13, 2), + ts(Token::Else, 1, 16, 4), + ts(Token::End, 1, 21, 3), + ts(Token::Eof, 1, 24, 0), + ], + ); + + do_ok_test( + "select case is else end", + &[ + ts(Token::Select, 1, 1, 6), + ts(Token::Case, 1, 8, 4), + ts(Token::Is, 1, 13, 2), + ts(Token::Else, 1, 16, 4), + ts(Token::End, 1, 21, 3), + ts(Token::Eof, 1, 24, 0), + ], + ); + } + + #[test] + fn test_sub() { + do_ok_test( + "SUB FOO END SUB", + &[ + ts(Token::Sub, 1, 1, 3), + ts(Token::Symbol(VarRef::new("FOO", None)), 1, 5, 3), + ts(Token::End, 1, 9, 3), + ts(Token::Sub, 1, 13, 3), + ts(Token::Eof, 1, 16, 0), + ], + ); + + do_ok_test( + "sub foo end sub", + &[ + ts(Token::Sub, 1, 1, 3), + ts(Token::Symbol(VarRef::new("foo", None)), 1, 5, 3), + ts(Token::End, 1, 9, 3), + ts(Token::Sub, 1, 13, 3), + ts(Token::Eof, 1, 16, 0), + ], + ); + } + + #[test] + fn test_while() { + do_ok_test( + "WHILE WEND", + &[ts(Token::While, 1, 1, 5), ts(Token::Wend, 1, 7, 4), ts(Token::Eof, 1, 11, 0)], + ); + + do_ok_test( + "while wend", + &[ts(Token::While, 1, 1, 5), ts(Token::Wend, 1, 7, 4), ts(Token::Eof, 1, 11, 0)], + ); + } + + /// Syntactic sugar to instantiate a test that verifies the parsing of a binary operator. + fn do_binary_operator_test(op: &str, t: Token) { + do_ok_test( + format!("a {} 2", op).as_ref(), + &[ + ts(new_auto_symbol("a"), 1, 1, 1), + ts(t, 1, 3, op.len()), + ts(Token::Integer(2), 1, 4 + op.len(), 1), + ts(Token::Eof, 1, 5 + op.len(), 0), + ], + ); + } + + /// Syntactic sugar to instantiate a test that verifies the parsing of a unary operator. + fn do_unary_operator_test(op: &str, t: Token) { + do_ok_test( + format!("{} 2", op).as_ref(), + &[ + ts(t, 1, 1, op.len()), + ts(Token::Integer(2), 1, 2 + op.len(), 1), + ts(Token::Eof, 1, 3 + op.len(), 0), + ], + ); + } + + #[test] + fn test_operator_relational_ops() { + do_binary_operator_test("=", Token::Equal); + do_binary_operator_test("<>", Token::NotEqual); + do_binary_operator_test("<", Token::Less); + do_binary_operator_test("<=", Token::LessEqual); + do_binary_operator_test(">", Token::Greater); + do_binary_operator_test(">=", Token::GreaterEqual); + } + + #[test] + fn test_operator_arithmetic_ops() { + do_binary_operator_test("+", Token::Plus); + do_binary_operator_test("-", Token::Minus); + do_binary_operator_test("*", Token::Multiply); + do_binary_operator_test("/", Token::Divide); + do_binary_operator_test("MOD", Token::Modulo); + do_binary_operator_test("mod", Token::Modulo); + do_binary_operator_test("^", Token::Exponent); + do_unary_operator_test("-", Token::Minus); + } + + #[test] + fn test_operator_logical_bitwise_ops() { + do_binary_operator_test("AND", Token::And); + do_binary_operator_test("OR", Token::Or); + do_binary_operator_test("XOR", Token::Xor); + do_unary_operator_test("NOT", Token::Not); + + do_binary_operator_test("<<", Token::ShiftLeft); + do_binary_operator_test(">>", Token::ShiftRight); + } + + #[test] + fn test_operator_no_spaces() { + do_ok_test( + "z=2 654<>a32 3.1<0.1 8^7", + &[ + ts(new_auto_symbol("z"), 1, 1, 1), + ts(Token::Equal, 1, 2, 1), + ts(Token::Integer(2), 1, 3, 1), + ts(Token::Integer(654), 1, 5, 3), + ts(Token::NotEqual, 1, 8, 2), + ts(new_auto_symbol("a32"), 1, 10, 3), + ts(Token::Double(3.1), 1, 14, 3), + ts(Token::Less, 1, 17, 1), + ts(Token::Double(0.1), 1, 18, 3), + ts(Token::Integer(8), 1, 22, 1), + ts(Token::Exponent, 1, 23, 1), + ts(Token::Integer(7), 1, 24, 1), + ts(Token::Eof, 1, 25, 0), + ], + ); + } + + #[test] + fn test_parenthesis() { + do_ok_test( + "(a) (\"foo\") (3)", + &[ + ts(Token::LeftParen, 1, 1, 1), + ts(new_auto_symbol("a"), 1, 2, 1), + ts(Token::RightParen, 1, 3, 1), + ts(Token::LeftParen, 1, 5, 1), + ts(Token::Text("foo".to_owned()), 1, 6, 5), + ts(Token::RightParen, 1, 11, 1), + ts(Token::LeftParen, 1, 13, 1), + ts(Token::Integer(3), 1, 14, 1), + ts(Token::RightParen, 1, 15, 1), + ts(Token::Eof, 1, 16, 0), + ], + ); + } + + #[test] + fn test_peekable_lexer() { + let mut input = b"a b 123".as_ref(); + let mut lexer = Lexer::from(&mut input).peekable(); + assert_eq!(new_auto_symbol("a"), lexer.peek().unwrap().token); + assert_eq!(new_auto_symbol("a"), lexer.peek().unwrap().token); + assert_eq!(new_auto_symbol("a"), lexer.read().unwrap().token); + assert_eq!(new_auto_symbol("b"), lexer.read().unwrap().token); + assert_eq!(Token::Integer(123), lexer.peek().unwrap().token); + assert_eq!(Token::Integer(123), lexer.read().unwrap().token); + assert_eq!(Token::Eof, lexer.peek().unwrap().token); + assert_eq!(Token::Eof, lexer.read().unwrap().token); + } + + #[test] + fn test_recoverable_errors() { + do_ok_test( + "0.1.28+5", + &[ + ts(Token::Bad("Too many dots in numeric literal".to_owned()), 1, 1, 3), + ts(Token::Plus, 1, 7, 1), + ts(Token::Integer(5), 1, 8, 1), + ts(Token::Eof, 1, 9, 0), + ], + ); + + do_ok_test( + "1 .3", + &[ + ts(Token::Integer(1), 1, 1, 1), + ts(Token::Bad("Unknown character: .".to_owned()), 1, 3, 2), + ts(Token::Eof, 1, 5, 0), + ], + ); + + do_ok_test( + "1 3. 2", + &[ + ts(Token::Integer(1), 1, 1, 1), + ts(Token::Bad("Unknown character: .".to_owned()), 1, 3, 1), + ts(Token::Integer(2), 1, 6, 1), + ts(Token::Eof, 1, 7, 0), + ], + ); + + do_ok_test( + "9999999999+5", + &[ + ts( + Token::Bad( + "Bad integer 9999999999: number too large to fit in target type".to_owned(), + ), + 1, + 1, + 1, + ), + ts(Token::Plus, 1, 11, 1), + ts(Token::Integer(5), 1, 12, 1), + ts(Token::Eof, 1, 13, 0), + ], + ); + + do_ok_test( + "\n3!2 1", + &[ + ts(Token::Eol, 1, 1, 1), + ts(Token::Bad("Unexpected character in numeric literal: !".to_owned()), 2, 1, 2), + ts(Token::Integer(1), 2, 5, 1), + ts(Token::Eof, 2, 6, 0), + ], + ); + + do_ok_test( + "a b|d 5", + &[ + ts(new_auto_symbol("a"), 1, 1, 1), + ts(Token::Bad("Unexpected character in symbol: |".to_owned()), 1, 3, 2), + ts(Token::Integer(5), 1, 7, 1), + ts(Token::Eof, 1, 8, 0), + ], + ); + + do_ok_test( + "( \"this is incomplete", + &[ + ts(Token::LeftParen, 1, 1, 1), + ts( + Token::Bad("Incomplete string due to EOF: this is incomplete".to_owned()), + 1, + 3, + 1, + ), + ts(Token::Eof, 1, 22, 0), + ], + ); + + do_ok_test( + "+ - ! * / MOD ^", + &[ + ts(Token::Plus, 1, 1, 1), + ts(Token::Minus, 1, 3, 1), + ts(Token::Bad("Unknown character: !".to_owned()), 1, 5, 1), + ts(Token::Multiply, 1, 7, 1), + ts(Token::Divide, 1, 9, 1), + ts(Token::Modulo, 1, 11, 3), + ts(Token::Exponent, 1, 15, 1), + ts(Token::Eof, 1, 16, 0), + ], + ); + + do_ok_test( + "@+", + &[ + ts(Token::Bad("Empty label name".to_owned()), 1, 1, 1), + ts(Token::Plus, 1, 2, 1), + ts(Token::Eof, 1, 3, 0), + ], + ); + + do_ok_test( + "@123", + &[ + ts(Token::Bad("Empty label name".to_owned()), 1, 1, 1), + ts(Token::Integer(123), 1, 2, 3), + ts(Token::Eof, 1, 5, 0), + ], + ); + } + + /// A reader that generates an error on the second read. + /// + /// Assumes that the buffered data in `good` is read in one go. + struct FaultyReader { + good: Option>, + } + + impl FaultyReader { + /// Creates a new faulty read with the given input data. + /// + /// `good` must be newline-terminated to prevent the caller from reading too much in one go. + fn new(good: &str) -> Self { + assert!(good.ends_with('\n')); + Self { good: Some(good.as_bytes().to_owned()) } + } + } + + impl io::Read for FaultyReader { + fn read(&mut self, buf: &mut [u8]) -> io::Result { + // This assumes that the good data fits within one read operation of the lexer. + if let Some(good) = self.good.take() { + assert!(buf.len() > good.len()); + buf[0..good.len()].clone_from_slice(&good[..]); + Ok(good.len()) + } else { + Err(io::Error::from(io::ErrorKind::InvalidData)) + } + } + } + + #[test] + fn test_unrecoverable_io_error() { + let mut reader = FaultyReader::new("3 + 5\n"); + let mut lexer = Lexer::from(&mut reader); + + assert_eq!(Token::Integer(3), lexer.read().unwrap().token); + assert_eq!(Token::Plus, lexer.read().unwrap().token); + assert_eq!(Token::Integer(5), lexer.read().unwrap().token); + assert_eq!(Token::Eol, lexer.read().unwrap().token); + let e = lexer.read().unwrap_err(); + assert_eq!(io::ErrorKind::InvalidData, e.kind()); + let e = lexer.read().unwrap_err(); + assert_eq!(io::ErrorKind::Other, e.kind()); + } +} diff --git a/core2/src/lib.rs b/core2/src/lib.rs new file mode 100644 index 00000000..b1a806ba --- /dev/null +++ b/core2/src/lib.rs @@ -0,0 +1,42 @@ +// EndBASIC +// Copyright 2020 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! The EndBASIC core language parser, compiler, and virtual machine. + +mod ast; +mod bytecode; +mod callable; +mod compiler; +mod image; +mod lexer; +mod mem; +mod num; +mod parser; +mod reader; +mod vm; + +pub use ast::{ArgSep, ExprType}; +pub use bytecode::{ExitCode, InvalidExitCodeError, VarArgTag}; +pub use callable::*; +pub use compiler::{ + Compiler, Error as CompilerError, GlobalDef, GlobalDefKind, SymbolKey, only_metadata, +}; +pub use image::Image; +pub use mem::ConstantDatum; +pub use reader::LineCol; +pub use vm::{GetGlobalError, GetGlobalResult, StopReason, Vm}; + +#[cfg(test)] +mod testutils; diff --git a/core2/src/mem.rs b/core2/src/mem.rs new file mode 100644 index 00000000..7acfe12f --- /dev/null +++ b/core2/src/mem.rs @@ -0,0 +1,253 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Memory representation and related types. + +use crate::ExprType; +use crate::num::{U24, unchecked_u24_as_usize}; +use std::convert::TryFrom; +use std::hash::Hash; + +/// Data for a multidimensional array stored on the heap. +#[derive(Clone, Debug)] +pub(crate) struct ArrayData { + /// Size of each dimension. + pub(crate) dimensions: Vec, + + /// Flattened row-major storage of element values as `u64` (matching register representation). + pub(crate) values: Vec, +} + +impl ArrayData { + /// Computes the flat index into `values` for the given `subscripts`, with bounds checking. + pub(crate) fn flat_index(&self, subscripts: &[i32]) -> Result { + debug_assert_eq!( + subscripts.len(), + self.dimensions.len(), + "Invalid number of subscripts; guaranteed valid by the compiler" + ); + + let mut offset = 0; + let mut multiplier = 1; + for (s, d) in subscripts.iter().zip(&self.dimensions) { + let Ok(s) = usize::try_from(*s) else { + return Err(format!("Subscript {} cannot be negative", s)); + }; + if s >= *d { + return Err(format!("Subscript {} exceeds limit of {}", s, d)); + } + offset += s * multiplier; + multiplier *= d; + } + Ok(offset) + } +} + +/// A typed scalar value, used both in the compile-time constant pool and as a +/// return value when inspecting global variables after execution. +/// +/// Only scalar types that can be hashed are included here. Arrays are never +/// stored as `ConstantDatum`. +#[derive(Clone, Debug)] +pub enum ConstantDatum { + /// A boolean value. + Boolean(bool), + + /// A double-precision floating-point value. + Double(f64), + + /// A 32-bit signed integer value. + Integer(i32), + + /// A string value. + Text(String), +} + +impl PartialEq for ConstantDatum { + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (Self::Boolean(a), Self::Boolean(b)) => a == b, + (Self::Double(a), Self::Double(b)) => a.to_bits() == b.to_bits(), + (Self::Integer(a), Self::Integer(b)) => a == b, + (Self::Text(a), Self::Text(b)) => a == b, + _ => false, + } + } +} + +impl Eq for ConstantDatum {} + +impl Hash for ConstantDatum { + fn hash(&self, state: &mut H) { + std::mem::discriminant(self).hash(state); + match self { + Self::Boolean(b) => b.hash(state), + Self::Double(d) => d.to_bits().hash(state), + Self::Integer(i) => i.hash(state), + Self::Text(s) => s.hash(state), + } + } +} + +impl From for ConstantDatum { + fn from(value: bool) -> Self { + Self::Boolean(value) + } +} + +impl From for ConstantDatum { + fn from(value: f64) -> Self { + Self::Double(value) + } +} + +impl From for ConstantDatum { + fn from(value: i32) -> Self { + Self::Integer(value) + } +} + +impl From<&str> for ConstantDatum { + fn from(value: &str) -> Self { + Self::Text(value.to_owned()) + } +} + +impl From for ConstantDatum { + fn from(value: String) -> Self { + Self::Text(value) + } +} + +impl ConstantDatum { + /// Returns the type of the constant datum. + pub(crate) fn etype(&self) -> ExprType { + match self { + Self::Boolean(..) => ExprType::Boolean, + Self::Double(..) => ExprType::Double, + Self::Integer(..) => ExprType::Integer, + Self::Text(..) => ExprType::Text, + } + } +} + +/// A heap-allocated value used at runtime. +/// +/// Only types that require heap allocation are included here. Scalars other than +/// `Text` live directly in registers and never appear on the heap. +#[derive(Clone, Debug)] +pub(crate) enum HeapDatum { + /// An array value. + Array(ArrayData), + + /// A string value. + Text(String), +} + +/// Tagged pointers for constant and heap addresses. +/// +/// A `DatumPtr` indexes into the constant pool or the heap, where datum values live. +/// The encoding uses the sign of the lower 32 bits of a `u64`: positive values are +/// constant pool indices, and negative values (two's complement) are heap indices. +/// +/// This is distinct from `TaggedRegisterRef`, which points to a register in the register +/// file rather than to data storage. +#[derive(Clone, Copy)] +pub(crate) enum DatumPtr { + /// A pointer to an entry in the constants pool. + Constant(U24), + + /// A pointer to an entry in the heap. + Heap(U24), +} + +impl From for DatumPtr { + fn from(value: u64) -> Self { + let signed_value = value as i32; + if signed_value < 0 { + DatumPtr::Heap(U24::try_from((-signed_value - 1) as u32).unwrap()) + } else { + DatumPtr::Constant(U24::try_from(signed_value as u32).unwrap()) + } + } +} + +impl DatumPtr { + /// Creates a new pointer for a heap `index` and returns its `u64` representation. + pub(crate) fn for_heap(index: u32) -> u64 { + let raw = index as i32; + let raw = -raw - 1; + raw as u64 + } + + /// Resolves this pointer and returns the string it points to. + /// + /// Panics if the pointed-to datum is not a `Text` value. + pub(crate) fn resolve_string<'b>( + &self, + constants: &'b [ConstantDatum], + heap: &'b [HeapDatum], + ) -> &'b str { + match self { + DatumPtr::Constant(index) => match &constants[unchecked_u24_as_usize(*index)] { + ConstantDatum::Text(s) => s, + _ => panic!("Constant pointer does not point to a Text value"), + }, + DatumPtr::Heap(index) => match &heap[unchecked_u24_as_usize(*index)] { + HeapDatum::Text(s) => s, + _ => panic!("Heap pointer does not point to a Text value"), + }, + } + } + + /// Extracts the heap index from this pointer. + /// + /// Panics if this is not a heap pointer. + pub(crate) fn heap_index(&self) -> usize { + match self { + DatumPtr::Heap(index) => unchecked_u24_as_usize(*index), + DatumPtr::Constant(_) => panic!("Expected a heap pointer"), + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_constant_datum_from_scalars() { + assert_eq!(ConstantDatum::Boolean(true), ConstantDatum::from(true)); + assert_eq!(ConstantDatum::Double(3.25), ConstantDatum::from(3.25)); + assert_eq!(ConstantDatum::Integer(-7), ConstantDatum::from(-7)); + } + + #[test] + fn test_constant_datum_from_str() { + let mut text = "hello".to_owned(); + let datum = ConstantDatum::from(text.as_str()); + text.clear(); + + assert_eq!(ConstantDatum::Text("hello".to_owned()), datum); + } + + #[test] + fn test_constant_datum_from_string() { + assert_eq!( + ConstantDatum::Text("hello".to_owned()), + ConstantDatum::from("hello".to_owned()) + ); + } +} diff --git a/core2/src/num.rs b/core2/src/num.rs new file mode 100644 index 00000000..d8ea9dcb --- /dev/null +++ b/core2/src/num.rs @@ -0,0 +1,134 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Efficient conversion utilities with diagnostics. + +use std::convert::TryFrom; +use std::num::TryFromIntError; + +/// An unsigned integer constrained to 24 bits. +#[derive(Clone, Copy)] +pub(crate) struct U24(u32); + +impl TryFrom for U24 { + type Error = (); + + fn try_from(value: u32) -> Result { + if value >= (1 << 24) { Err(()) } else { Ok(Self(value)) } + } +} + +impl TryFrom for usize { + type Error = TryFromIntError; + + fn try_from(value: U24) -> Result { + Self::try_from(value.0) + } +} + +/// A trait to perform an unchecked cast from one type to another. +trait UncheckedFrom { + /// The source type to convert from. + type T; + + /// Converts `value` to `Self`. + /// + /// Must be implemented as an `as` cast in release builds but can do extra + /// sanity-checking in debug builds. + fn unchecked_from(value: Self::T) -> Self; +} + +/// Implements an unchecked conversion function between two integer types. +/// +/// In debug mode, this asserts that the input value fits in the return type. +/// In release mode, this makes the conversion with truncation. +macro_rules! impl_unchecked_cast { + ( $name:ident, $from_ty:ty, $to_ty:ty, primitive ) => { + pub(crate) fn $name(value: $from_ty) -> $to_ty { + if cfg!(debug_assertions) { + <$to_ty>::try_from(value).unwrap() + } else { + value as $to_ty + } + } + }; + + ( $name:ident, $from_ty:ty, $to_ty:ty, user_defined ) => { + pub(crate) fn $name(value: $from_ty) -> $to_ty { + if cfg!(debug_assertions) { + <$to_ty>::try_from(value).unwrap() + } else { + <$to_ty>::unchecked_from(value) + } + } + }; +} + +impl_unchecked_cast!(unchecked_u32_as_u8, u32, u8, primitive); +impl_unchecked_cast!(unchecked_u32_as_u16, u32, u16, primitive); +impl_unchecked_cast!(unchecked_u32_as_usize, u32, usize, primitive); +impl_unchecked_cast!(unchecked_u64_as_u8, u64, u8, primitive); +impl_unchecked_cast!(unchecked_usize_as_u8, usize, u8, primitive); +impl_unchecked_cast!(unchecked_usize_as_u32, usize, u32, primitive); + +impl UncheckedFrom for usize { + type T = U24; + + fn unchecked_from(value: Self::T) -> Self { + value.0 as Self + } +} + +impl_unchecked_cast!(unchecked_u24_as_usize, U24, usize, user_defined); + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_unchecked_u32_as_u8() { + assert_eq!(10u8, unchecked_u32_as_u8(10u32)); + } + + #[test] + fn test_unchecked_u32_as_u16() { + assert_eq!(10u16, unchecked_u32_as_u16(10u32)); + } + + #[test] + fn test_unchecked_u32_as_usize() { + assert_eq!(10usize, unchecked_u32_as_usize(10u32)); + } + + #[test] + fn test_unchecked_u64_as_u8() { + assert_eq!(10u8, unchecked_u64_as_u8(10u64)); + } + + #[test] + fn test_unchecked_usize_as_u8() { + assert_eq!(10u8, unchecked_usize_as_u8(10_usize)); + } + + #[test] + fn test_unchecked_usize_as_u32() { + assert_eq!(10u32, unchecked_usize_as_u32(10_usize)); + } + + #[test] + fn test_unchecked_u24_as_usize() { + assert_eq!(10_usize, unchecked_u24_as_usize(U24(10))); + } +} diff --git a/core2/src/parser.rs b/core2/src/parser.rs new file mode 100644 index 00000000..5c57c123 --- /dev/null +++ b/core2/src/parser.rs @@ -0,0 +1,5008 @@ +// EndBASIC +// Copyright 2020 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Statement and expression parser for the EndBASIC language. + +use crate::ast::*; +use crate::lexer::{Lexer, PeekableLexer, Token, TokenSpan}; +use crate::reader::LineCol; +use std::cmp::Ordering; +use std::io; + +/// Errors that can occur during parsing. +#[derive(Debug, thiserror::Error)] +pub enum Error { + /// Syntax error in the input program at the given position with a description. + #[error("{}: {}", .0, .1)] + Bad(LineCol, String), + + /// I/O error while reading the input program. + #[error("{0}: {1}")] + Io(LineCol, io::Error), +} + +impl From<(LineCol, io::Error)> for Error { + fn from(value: (LineCol, io::Error)) -> Self { + Self::Io(value.0, value.1) + } +} + +/// Result for parser return values. +pub type Result = std::result::Result; + +/// Transforms a `VarRef` into an unannotated name. +/// +/// This is only valid for references that have no annotations in them. +fn vref_to_unannotated_string(vref: VarRef, pos: LineCol) -> Result { + if vref.ref_type.is_some() { + return Err(Error::Bad(pos, format!("Type annotation not allowed in {}", vref))); + } + Ok(vref.name) +} + +/// Converts a collection of `ArgSpan`s passed to a function or array reference to a collection +/// of expressions with proper validation. +pub(crate) fn argspans_to_exprs(spans: Vec) -> Vec { + let nargs = spans.len(); + let mut exprs = Vec::with_capacity(spans.len()); + for (i, span) in spans.into_iter().enumerate() { + debug_assert!( + (span.sep == ArgSep::End || i < nargs - 1) + || (span.sep != ArgSep::End || i == nargs - 1) + ); + match span.expr { + Some(expr) => exprs.push(expr), + None => unreachable!(), + } + } + exprs +} + +/// Operators that can appear within an expression. +/// +/// The main difference between this and `lexer::Token` is that, in here, we differentiate the +/// meaning of a minus sign and separate it in its two variants: the 2-operand `Subtract` and the +/// 1-operand `Negate`. +/// +/// That said, this type also is the right place to abstract away operator-related logic to +/// implement the expression parsing algorithm, so it's not completely useless. +#[derive(Debug, Eq, PartialEq)] +enum ExprOp { + /// Left parenthesis, used as a grouping marker in the operator stack. + LeftParen, + + /// Binary addition operator. + Add, + /// Binary subtraction operator. + Subtract, + /// Binary multiplication operator. + Multiply, + /// Binary division operator. + Divide, + /// Binary modulo operator. + Modulo, + /// Binary exponentiation operator. + Power, + /// Unary negation operator. + Negate, + + /// Binary equality comparison operator. + Equal, + /// Binary inequality comparison operator. + NotEqual, + /// Binary less-than comparison operator. + Less, + /// Binary less-than-or-equal comparison operator. + LessEqual, + /// Binary greater-than comparison operator. + Greater, + /// Binary greater-than-or-equal comparison operator. + GreaterEqual, + + /// Binary logical AND operator. + And, + /// Unary logical NOT operator. + Not, + /// Binary logical OR operator. + Or, + /// Binary logical XOR operator. + Xor, + + /// Binary left shift operator. + ShiftLeft, + /// Binary right shift operator. + ShiftRight, +} + +impl ExprOp { + /// Constructs a new operator based on a token, which must have a valid correspondence. + fn from(t: Token) -> Self { + match t { + Token::Equal => ExprOp::Equal, + Token::NotEqual => ExprOp::NotEqual, + Token::Less => ExprOp::Less, + Token::LessEqual => ExprOp::LessEqual, + Token::Greater => ExprOp::Greater, + Token::GreaterEqual => ExprOp::GreaterEqual, + Token::Plus => ExprOp::Add, + Token::Multiply => ExprOp::Multiply, + Token::Divide => ExprOp::Divide, + Token::Modulo => ExprOp::Modulo, + Token::Exponent => ExprOp::Power, + Token::And => ExprOp::And, + Token::Or => ExprOp::Or, + Token::Xor => ExprOp::Xor, + Token::ShiftLeft => ExprOp::ShiftLeft, + Token::ShiftRight => ExprOp::ShiftRight, + Token::Minus => panic!("Ambiguous token; cannot derive ExprOp"), + _ => panic!("Called on an non-operator"), + } + } + + /// Returns the priority of this operator. The specific number's meaning is only valid when + /// comparing it against other calls to this function. Higher number imply higher priority. + fn priority(&self) -> i8 { + match self { + ExprOp::LeftParen => 6, + ExprOp::Power => 6, + + ExprOp::Negate => 5, + ExprOp::Not => 5, + + ExprOp::Multiply => 4, + ExprOp::Divide => 4, + ExprOp::Modulo => 4, + + ExprOp::Add => 3, + ExprOp::Subtract => 3, + + ExprOp::ShiftLeft => 2, + ExprOp::ShiftRight => 2, + + ExprOp::Equal => 1, + ExprOp::NotEqual => 1, + ExprOp::Less => 1, + ExprOp::LessEqual => 1, + ExprOp::Greater => 1, + ExprOp::GreaterEqual => 1, + + ExprOp::And => 0, + ExprOp::Or => 0, + ExprOp::Xor => 0, + } + } +} + +/// An expression operator paired with its source position. +struct ExprOpSpan { + /// The expression operator. + op: ExprOp, + + /// The position where the operator appears in the source. + pos: LineCol, +} + +impl ExprOpSpan { + /// Creates a new span from its parts. + fn new(op: ExprOp, pos: LineCol) -> Self { + Self { op, pos } + } + + /// Pops operands from the `expr` stack, applies this operation, and pushes the result back. + fn apply(&self, exprs: &mut Vec) -> Result<()> { + fn apply1( + exprs: &mut Vec, + pos: LineCol, + f: fn(Box) -> Expr, + ) -> Result<()> { + if exprs.is_empty() { + return Err(Error::Bad(pos, "Not enough values to apply operator".to_owned())); + } + let expr = exprs.pop().unwrap(); + exprs.push(f(Box::from(UnaryOpSpan { expr, pos }))); + Ok(()) + } + + fn apply2( + exprs: &mut Vec, + pos: LineCol, + f: fn(Box) -> Expr, + ) -> Result<()> { + if exprs.len() < 2 { + return Err(Error::Bad(pos, "Not enough values to apply operator".to_owned())); + } + let rhs = exprs.pop().unwrap(); + let lhs = exprs.pop().unwrap(); + exprs.push(f(Box::from(BinaryOpSpan { lhs, rhs, pos }))); + Ok(()) + } + + match self.op { + ExprOp::Add => apply2(exprs, self.pos, Expr::Add), + ExprOp::Subtract => apply2(exprs, self.pos, Expr::Subtract), + ExprOp::Multiply => apply2(exprs, self.pos, Expr::Multiply), + ExprOp::Divide => apply2(exprs, self.pos, Expr::Divide), + ExprOp::Modulo => apply2(exprs, self.pos, Expr::Modulo), + ExprOp::Power => apply2(exprs, self.pos, Expr::Power), + + ExprOp::Equal => apply2(exprs, self.pos, Expr::Equal), + ExprOp::NotEqual => apply2(exprs, self.pos, Expr::NotEqual), + ExprOp::Less => apply2(exprs, self.pos, Expr::Less), + ExprOp::LessEqual => apply2(exprs, self.pos, Expr::LessEqual), + ExprOp::Greater => apply2(exprs, self.pos, Expr::Greater), + ExprOp::GreaterEqual => apply2(exprs, self.pos, Expr::GreaterEqual), + + ExprOp::And => apply2(exprs, self.pos, Expr::And), + ExprOp::Or => apply2(exprs, self.pos, Expr::Or), + ExprOp::Xor => apply2(exprs, self.pos, Expr::Xor), + + ExprOp::ShiftLeft => apply2(exprs, self.pos, Expr::ShiftLeft), + ExprOp::ShiftRight => apply2(exprs, self.pos, Expr::ShiftRight), + + ExprOp::Negate => apply1(exprs, self.pos, Expr::Negate), + ExprOp::Not => apply1(exprs, self.pos, Expr::Not), + + ExprOp::LeftParen => Ok(()), + } + } +} + +/// Parser that converts a token stream into an AST of statements. +pub struct Parser<'a> { + /// The lexer providing tokens for parsing. + lexer: PeekableLexer<'a>, +} + +impl<'a> Parser<'a> { + /// Creates a new parser from the given readable. + fn from(input: &'a mut dyn io::Read) -> Self { + Self { lexer: Lexer::from(input).peekable() } + } + + /// Expects the peeked token to be `t` and consumes it. Otherwise, leaves the token in the + /// stream and fails with error `err`. + fn expect_and_consume>(&mut self, t: Token, err: E) -> Result { + let peeked = self.lexer.peek()?; + if peeked.token != t { + return Err(Error::Bad(peeked.pos, err.into())); + } + Ok(self.lexer.consume_peeked()) + } + + /// Expects the peeked token to be `t` and consumes it. Otherwise, leaves the token in the + /// stream and fails with error `err`, pointing at `pos` as the original location of the + /// problem. + fn expect_and_consume_with_pos>( + &mut self, + t: Token, + pos: LineCol, + err: E, + ) -> Result<()> { + let peeked = self.lexer.peek()?; + if peeked.token != t { + return Err(Error::Bad(pos, err.into())); + } + self.lexer.consume_peeked(); + Ok(()) + } + + /// Reads statements until the `delim` keyword is found. The delimiter is not consumed. + fn parse_until(&mut self, delim: Token) -> Result> { + let mut stmts = vec![]; + loop { + let peeked = self.lexer.peek()?; + if peeked.token == delim { + break; + } else if peeked.token == Token::Eol { + self.lexer.consume_peeked(); + continue; + } + match self.parse_one_safe()? { + Some(stmt) => stmts.push(stmt), + None => break, + } + } + Ok(stmts) + } + + /// Parses an assignment for the variable reference `vref` already read. + fn parse_assignment(&mut self, vref: VarRef, vref_pos: LineCol) -> Result { + let expr = self.parse_required_expr("Missing expression in assignment")?; + + let next = self.lexer.peek()?; + match &next.token { + Token::Eof | Token::Eol | Token::Else => (), + t => return Err(Error::Bad(next.pos, format!("Unexpected {} in assignment", t))), + } + Ok(Statement::Assignment(AssignmentSpan { vref, vref_pos, expr })) + } + + /// Parses an assignment to the array `varref` with `subscripts`, both of which have already + /// been read. + fn parse_array_assignment( + &mut self, + vref: VarRef, + vref_pos: LineCol, + subscripts: Vec, + ) -> Result { + let expr = self.parse_required_expr("Missing expression in array assignment")?; + + let next = self.lexer.peek()?; + match &next.token { + Token::Eof | Token::Eol | Token::Else => (), + t => return Err(Error::Bad(next.pos, format!("Unexpected {} in array assignment", t))), + } + Ok(Statement::ArrayAssignment(ArrayAssignmentSpan { vref, vref_pos, subscripts, expr })) + } + + /// Parses a builtin call (things of the form `INPUT a`). + fn parse_builtin_call( + &mut self, + vref: VarRef, + vref_pos: LineCol, + mut first: Option, + ) -> Result { + let mut name = vref_to_unannotated_string(vref, vref_pos)?; + name.make_ascii_uppercase(); + + let mut args = vec![]; + loop { + let expr = self.parse_expr(first.take())?; + + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eof | Token::Eol | Token::Else => { + if expr.is_some() || !args.is_empty() { + args.push(ArgSpan { expr, sep: ArgSep::End, sep_pos: peeked.pos }); + } + break; + } + Token::Semicolon => { + let peeked = self.lexer.consume_peeked(); + args.push(ArgSpan { expr, sep: ArgSep::Short, sep_pos: peeked.pos }); + } + Token::Comma => { + let peeked = self.lexer.consume_peeked(); + args.push(ArgSpan { expr, sep: ArgSep::Long, sep_pos: peeked.pos }); + } + Token::As => { + let peeked = self.lexer.consume_peeked(); + args.push(ArgSpan { expr, sep: ArgSep::As, sep_pos: peeked.pos }); + } + _ => { + return Err(Error::Bad( + peeked.pos, + "Expected comma, semicolon, or end of statement".to_owned(), + )); + } + } + } + Ok(Statement::Call(CallSpan { vref: VarRef::new(name, None), vref_pos, args })) + } + + /// Starts processing either an array reference or a builtin call and disambiguates between the + /// two. + fn parse_array_or_builtin_call( + &mut self, + vref: VarRef, + vref_pos: LineCol, + ) -> Result { + match self.lexer.peek()?.token { + Token::LeftParen => { + let left_paren = self.lexer.consume_peeked(); + let spans = self.parse_comma_separated_exprs()?; + let mut exprs = spans.into_iter().map(|span| span.expr.unwrap()).collect(); + match self.lexer.peek()?.token { + Token::Equal => { + self.lexer.consume_peeked(); + self.parse_array_assignment(vref, vref_pos, exprs) + } + _ => { + if exprs.len() != 1 { + return Err(Error::Bad( + left_paren.pos, + "Expected expression".to_owned(), + )); + } + self.parse_builtin_call(vref, vref_pos, Some(exprs.remove(0))) + } + } + } + _ => self.parse_builtin_call(vref, vref_pos, None), + } + } + + /// Parses the type name of an `AS` type definition. + /// + /// The `AS` token has already been consumed, so all this does is read a literal type name and + /// convert it to the corresponding expression type. + fn parse_as_type(&mut self) -> Result<(ExprType, LineCol)> { + let token_span = self.lexer.read()?; + match token_span.token { + Token::BooleanName => Ok((ExprType::Boolean, token_span.pos)), + Token::DoubleName => Ok((ExprType::Double, token_span.pos)), + Token::IntegerName => Ok((ExprType::Integer, token_span.pos)), + Token::TextName => Ok((ExprType::Text, token_span.pos)), + t => Err(Error::Bad( + token_span.pos, + format!("Invalid type name {} in AS type definition", t), + )), + } + } + + /// Parses a `DATA` statement. + fn parse_data(&mut self) -> Result { + let mut values = vec![]; + loop { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eof | Token::Eol | Token::Else => { + values.push(None); + break; + } + _ => (), + } + + let token_span = self.lexer.read()?; + match token_span.token { + Token::Boolean(b) => { + values.push(Some(Expr::Boolean(BooleanSpan { value: b, pos: token_span.pos }))) + } + Token::Double(d) => { + values.push(Some(Expr::Double(DoubleSpan { value: d, pos: token_span.pos }))) + } + Token::Integer(i) => { + values.push(Some(Expr::Integer(IntegerSpan { value: i, pos: token_span.pos }))) + } + Token::Text(t) => { + values.push(Some(Expr::Text(TextSpan { value: t, pos: token_span.pos }))) + } + + Token::Minus => { + let token_span2 = self.lexer.read()?; + match token_span2.token { + Token::Double(d) => values.push(Some(Expr::Double(DoubleSpan { + value: -d, + pos: token_span.pos, + }))), + Token::Integer(i) => values.push(Some(Expr::Integer(IntegerSpan { + value: -i, + pos: token_span.pos, + }))), + _ => { + return Err(Error::Bad( + token_span.pos, + "Expected number after -".to_owned(), + )); + } + } + } + + Token::Eof | Token::Eol | Token::Else => { + panic!("Should not be consumed here; handled above") + } + + Token::Comma => { + values.push(None); + continue; + } + + t => { + return Err(Error::Bad( + token_span.pos, + format!("Unexpected {} in DATA statement", t), + )); + } + } + + let peeked = self.lexer.peek()?; + match &peeked.token { + Token::Eof | Token::Eol | Token::Else => { + break; + } + + Token::Comma => { + self.lexer.consume_peeked(); + } + + t => { + return Err(Error::Bad( + peeked.pos, + format!("Expected comma after datum but found {}", t), + )); + } + } + } + Ok(Statement::Data(DataSpan { values })) + } + + /// Parses the `AS typename` clause of a `DIM` statement. The caller has already consumed the + /// `AS` token. + fn parse_dim_as(&mut self) -> Result<(ExprType, LineCol)> { + let peeked = self.lexer.peek()?; + let (vtype, vtype_pos) = match peeked.token { + Token::Eof | Token::Eol => (ExprType::Integer, peeked.pos), + Token::As => { + self.lexer.consume_peeked(); + self.parse_as_type()? + } + _ => return Err(Error::Bad(peeked.pos, "Expected AS or end of statement".to_owned())), + }; + + let next = self.lexer.peek()?; + match &next.token { + Token::Eof | Token::Eol => (), + t => return Err(Error::Bad(next.pos, format!("Unexpected {} in DIM statement", t))), + } + + Ok((vtype, vtype_pos)) + } + + /// Parses a `DIM` statement. + fn parse_dim(&mut self) -> Result { + let peeked = self.lexer.peek()?; + let mut shared = false; + if peeked.token == Token::Shared { + self.lexer.consume_peeked(); + shared = true; + } + + let token_span = self.lexer.read()?; + let vref = match token_span.token { + Token::Symbol(vref) => vref, + _ => { + return Err(Error::Bad( + token_span.pos, + "Expected variable name after DIM".to_owned(), + )); + } + }; + // TODO(jmmv): Why do we require unannotated strings? We could also take one and then + // skip the `AS ` portion. + let name = vref_to_unannotated_string(vref, token_span.pos)?; + let name_pos = token_span.pos; + + match self.lexer.peek()?.token { + Token::LeftParen => { + let peeked = self.lexer.consume_peeked(); + let dimensions = self.parse_comma_separated_exprs()?; + if dimensions.is_empty() { + return Err(Error::Bad( + peeked.pos, + "Arrays require at least one dimension".to_owned(), + )); + } + let (subtype, subtype_pos) = self.parse_dim_as()?; + Ok(Statement::DimArray(DimArraySpan { + name, + name_pos, + shared, + dimensions: argspans_to_exprs(dimensions), + subtype, + subtype_pos, + })) + } + _ => { + let (vtype, vtype_pos) = self.parse_dim_as()?; + Ok(Statement::Dim(DimSpan { name, name_pos, shared, vtype, vtype_pos })) + } + } + } + + /// Parses the `UNTIL` or `WHILE` clause of a `DO` loop. + /// + /// `part` is a string indicating where the clause is expected (either after `DO` or after + /// `LOOP`). + /// + /// Returns the guard expression and a boolean indicating if this is an `UNTIL` clause. + fn parse_do_guard(&mut self, part: &str) -> Result> { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Until => { + self.lexer.consume_peeked(); + let expr = self.parse_required_expr("No expression in UNTIL clause")?; + Ok(Some((expr, true))) + } + Token::While => { + self.lexer.consume_peeked(); + let expr = self.parse_required_expr("No expression in WHILE clause")?; + Ok(Some((expr, false))) + } + Token::Eof | Token::Eol => Ok(None), + _ => { + let token_span = self.lexer.consume_peeked(); + Err(Error::Bad( + token_span.pos, + format!("Expecting newline, UNTIL or WHILE after {}", part), + )) + } + } + } + + /// Parses a `DO` statement. + fn parse_do(&mut self, do_pos: LineCol) -> Result { + let pre_guard = self.parse_do_guard("DO")?; + self.expect_and_consume(Token::Eol, "Expecting newline after DO")?; + + let stmts = self.parse_until(Token::Loop)?; + self.expect_and_consume_with_pos(Token::Loop, do_pos, "DO without LOOP")?; + + let post_guard = self.parse_do_guard("LOOP")?; + + let guard = match (pre_guard, post_guard) { + (None, None) => DoGuard::Infinite, + (Some((guard, true)), None) => DoGuard::PreUntil(guard), + (Some((guard, false)), None) => DoGuard::PreWhile(guard), + (None, Some((guard, true))) => DoGuard::PostUntil(guard), + (None, Some((guard, false))) => DoGuard::PostWhile(guard), + (Some(_), Some(_)) => { + return Err(Error::Bad( + do_pos, + "DO loop cannot have pre and post guards at the same time".to_owned(), + )); + } + }; + + Ok(Statement::Do(DoSpan { guard, body: stmts })) + } + + /// Advances until the next statement after failing to parse a `DO` statement. + fn reset_do(&mut self) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::Loop => { + self.lexer.consume_peeked(); + loop { + match self.lexer.peek()?.token { + Token::Eof | Token::Eol => break, + _ => { + self.lexer.consume_peeked(); + } + } + } + break; + } + _ => { + self.lexer.consume_peeked(); + } + } + } + self.reset() + } + + /// Parses a potential `END` statement but, if this corresponds to a statement terminator such + /// as `END IF`, returns the token that followed `END`. + fn maybe_parse_end(&mut self, pos: LineCol) -> Result> { + match self.lexer.peek()?.token { + Token::Function => Ok(Err(Token::Function)), + Token::If => Ok(Err(Token::If)), + Token::Select => Ok(Err(Token::Select)), + Token::Sub => Ok(Err(Token::Sub)), + _ => { + let code = self.parse_expr(None)?; + Ok(Ok(Statement::End(EndSpan { code, pos }))) + } + } + } + + /// Parses an `END` statement. + fn parse_end(&mut self, pos: LineCol) -> Result { + match self.maybe_parse_end(pos)? { + Ok(stmt) => Ok(stmt), + Err(token) => Err(Error::Bad(pos, format!("END {} without {}", token, token))), + } + } + + /// Parses an `EXIT` statement. + fn parse_exit(&mut self, pos: LineCol) -> Result { + let peeked = self.lexer.peek()?; + let stmt = match peeked.token { + Token::Do => Statement::ExitDo(ExitSpan { pos }), + Token::For => Statement::ExitFor(ExitSpan { pos }), + Token::Function => Statement::ExitFunction(ExitSpan { pos }), + Token::Sub => Statement::ExitSub(ExitSpan { pos }), + _ => { + return Err(Error::Bad( + peeked.pos, + "Expecting DO, FOR, FUNCTION or SUB after EXIT".to_owned(), + )); + } + }; + self.lexer.consume_peeked(); + Ok(stmt) + } + + /// Parses a variable list of comma-separated expressions. The caller must have consumed the + /// open parenthesis and we stop processing when we encounter the terminating parenthesis (and + /// consume it). We expect at least one expression. + fn parse_comma_separated_exprs(&mut self) -> Result> { + let mut spans = vec![]; + + // The first expression is optional to support calls to functions without arguments. + let mut is_first = true; + let mut prev_expr = self.parse_expr(None)?; + + loop { + let peeked = self.lexer.peek()?; + let pos = peeked.pos; + match &peeked.token { + Token::RightParen => { + self.lexer.consume_peeked(); + + if let Some(expr) = prev_expr.take() { + spans.push(ArgSpan { expr: Some(expr), sep: ArgSep::End, sep_pos: pos }); + } else if !is_first { + return Err(Error::Bad(pos, "Missing expression".to_owned())); + } + + break; + } + Token::Comma => { + self.lexer.consume_peeked(); + + if let Some(expr) = prev_expr.take() { + // The first expression is optional to support calls to functions without + // arguments. + spans.push(ArgSpan { expr: Some(expr), sep: ArgSep::Long, sep_pos: pos }); + } else { + return Err(Error::Bad(pos, "Missing expression".to_owned())); + } + + prev_expr = self.parse_expr(None)?; + } + t => return Err(Error::Bad(pos, format!("Unexpected {}", t))), + } + + is_first = false; + } + + Ok(spans) + } + + /// Parses an expression. + /// + /// Returns `None` if no expression was found. This is necessary to treat the case of empty + /// arguments to statements, as is the case in `PRINT a , , b`. + /// + /// If the caller has already processed a parenthesized term of an expression like + /// `(first) + second`, then that term must be provided in `first`. + /// + /// This is an implementation of the Shunting Yard Algorithm by Edgar Dijkstra. + fn parse_expr(&mut self, first: Option) -> Result> { + let mut exprs: Vec = vec![]; + let mut op_spans: Vec = vec![]; + + let mut need_operand = true; // Also tracks whether an upcoming minus is unary. + if let Some(e) = first { + exprs.push(e); + need_operand = false; + } + + loop { + let mut handle_operand = |e, pos| { + if !need_operand { + return Err(Error::Bad(pos, "Unexpected value in expression".to_owned())); + } + need_operand = false; + exprs.push(e); + Ok(()) + }; + + // Stop processing if we encounter an expression separator, but don't consume it because + // the caller needs to have access to it. + match self.lexer.peek()?.token { + Token::Eof + | Token::Eol + | Token::As + | Token::Comma + | Token::Else + | Token::Semicolon + | Token::Then + | Token::To + | Token::Step => break, + Token::RightParen if !op_spans.iter().any(|eos| eos.op == ExprOp::LeftParen) => { + // We encountered an unbalanced parenthesis but we don't know if this is + // because we were called from within an argument list (in which case the + // caller consumed the opening parenthesis and is expecting to consume the + // closing parenthesis) or because we really found an invalid expression. + // Only the caller can know, so avoid consuming the token and exit. + break; + } + _ => (), + }; + + let ts = self.lexer.consume_peeked(); + match ts.token { + Token::Boolean(value) => { + handle_operand(Expr::Boolean(BooleanSpan { value, pos: ts.pos }), ts.pos)? + } + Token::Double(value) => { + handle_operand(Expr::Double(DoubleSpan { value, pos: ts.pos }), ts.pos)? + } + Token::Integer(value) => { + handle_operand(Expr::Integer(IntegerSpan { value, pos: ts.pos }), ts.pos)? + } + Token::Text(value) => { + handle_operand(Expr::Text(TextSpan { value, pos: ts.pos }), ts.pos)? + } + Token::Symbol(vref) => { + handle_operand(Expr::Symbol(SymbolSpan { vref, pos: ts.pos }), ts.pos)? + } + + Token::LeftParen => { + // If the last operand we encountered was a symbol, collapse it and the left + // parenthesis into the beginning of a function call. + match exprs.pop() { + Some(Expr::Symbol(span)) => { + if !need_operand { + exprs.push(Expr::Call(CallSpan { + vref: span.vref, + vref_pos: span.pos, + args: self.parse_comma_separated_exprs()?, + })); + need_operand = false; + } else { + // We popped out the last expression to see if it this left + // parenthesis started a function call... but it did not (it is a + // symbol following a parenthesis) so put both the expression and + // the token back. + op_spans.push(ExprOpSpan::new(ExprOp::LeftParen, ts.pos)); + exprs.push(Expr::Symbol(span)); + need_operand = true; + } + } + e => { + if let Some(e) = e { + // We popped out the last expression to see if this left + // parenthesis started a function call... but if it didn't, we have + // to put the expression back. + exprs.push(e); + } + if !need_operand { + return Err(Error::Bad( + ts.pos, + format!("Unexpected {} in expression", ts.token), + )); + } + op_spans.push(ExprOpSpan::new(ExprOp::LeftParen, ts.pos)); + need_operand = true; + } + }; + } + Token::RightParen => { + let mut found = false; + while let Some(eos) = op_spans.pop() { + eos.apply(&mut exprs)?; + if eos.op == ExprOp::LeftParen { + found = true; + break; + } + } + assert!(found, "Unbalanced parenthesis should have been handled above"); + need_operand = false; + } + + Token::Not => { + op_spans.push(ExprOpSpan::new(ExprOp::Not, ts.pos)); + need_operand = true; + } + Token::Minus => { + let op; + if need_operand { + op = ExprOp::Negate; + } else { + op = ExprOp::Subtract; + while let Some(eos2) = op_spans.last() { + if eos2.op == ExprOp::LeftParen || eos2.op.priority() < op.priority() { + break; + } + let eos2 = op_spans.pop().unwrap(); + eos2.apply(&mut exprs)?; + } + } + op_spans.push(ExprOpSpan::new(op, ts.pos)); + need_operand = true; + } + + Token::Equal + | Token::NotEqual + | Token::Less + | Token::LessEqual + | Token::Greater + | Token::GreaterEqual + | Token::Plus + | Token::Multiply + | Token::Divide + | Token::Modulo + | Token::Exponent + | Token::And + | Token::Or + | Token::Xor + | Token::ShiftLeft + | Token::ShiftRight => { + let op = ExprOp::from(ts.token); + while let Some(eos2) = op_spans.last() { + if eos2.op == ExprOp::LeftParen || eos2.op.priority() < op.priority() { + break; + } + let eos2 = op_spans.pop().unwrap(); + eos2.apply(&mut exprs)?; + } + op_spans.push(ExprOpSpan::new(op, ts.pos)); + need_operand = true; + } + + Token::Bad(e) => return Err(Error::Bad(ts.pos, e)), + + Token::Eof + | Token::Eol + | Token::As + | Token::Comma + | Token::Else + | Token::Semicolon + | Token::Then + | Token::To + | Token::Step => { + panic!("Field separators handled above") + } + + Token::BooleanName + | Token::Case + | Token::Data + | Token::Declare + | Token::Do + | Token::Dim + | Token::DoubleName + | Token::Elseif + | Token::End + | Token::Error + | Token::Exit + | Token::For + | Token::Function + | Token::Gosub + | Token::Goto + | Token::If + | Token::Is + | Token::IntegerName + | Token::Label(_) + | Token::Loop + | Token::Next + | Token::On + | Token::Resume + | Token::Return + | Token::Select + | Token::Shared + | Token::Sub + | Token::TextName + | Token::Until + | Token::Wend + | Token::While => { + return Err(Error::Bad(ts.pos, "Unexpected keyword in expression".to_owned())); + } + }; + } + + while let Some(eos) = op_spans.pop() { + match eos.op { + ExprOp::LeftParen => { + return Err(Error::Bad(eos.pos, "Unbalanced parenthesis".to_owned())); + } + _ => eos.apply(&mut exprs)?, + } + } + + if let Some(expr) = exprs.pop() { Ok(Some(expr)) } else { Ok(None) } + } + + /// Wrapper over `parse_expr` that requires an expression to be present and returns an error + /// with `msg` otherwise. + fn parse_required_expr(&mut self, msg: &'static str) -> Result { + let next_pos = self.lexer.peek()?.pos; + match self.parse_expr(None)? { + Some(expr) => Ok(expr), + None => Err(Error::Bad(next_pos, msg.to_owned())), + } + } + + /// Parses a `GOSUB` statement. + fn parse_gosub(&mut self) -> Result { + let token_span = self.lexer.read()?; + match token_span.token { + Token::Integer(i) => { + let target = format!("{}", i); + Ok(Statement::Gosub(GotoSpan { target, target_pos: token_span.pos })) + } + Token::Label(target) => { + Ok(Statement::Gosub(GotoSpan { target, target_pos: token_span.pos })) + } + _ => Err(Error::Bad(token_span.pos, "Expected label name after GOSUB".to_owned())), + } + } + + /// Parses a `GOTO` statement. + fn parse_goto(&mut self) -> Result { + let token_span = self.lexer.read()?; + match token_span.token { + Token::Integer(i) => { + let target = format!("{}", i); + Ok(Statement::Goto(GotoSpan { target, target_pos: token_span.pos })) + } + Token::Label(target) => { + Ok(Statement::Goto(GotoSpan { target, target_pos: token_span.pos })) + } + _ => Err(Error::Bad(token_span.pos, "Expected label name after GOTO".to_owned())), + } + } + + /// Parses the branches of a uniline `IF` statement. + fn parse_if_uniline(&mut self, branches: &mut Vec) -> Result<()> { + debug_assert!(!branches.is_empty(), "Caller must populate the guard of the first branch"); + + let mut has_else = false; + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Else => has_else = true, + _ => { + let stmt = self + .parse_uniline()? + .expect("The caller already checked for a non-empty token"); + branches[0].body.push(stmt); + } + } + + let peeked = self.lexer.peek()?; + has_else |= peeked.token == Token::Else; + + if has_else { + let else_span = self.lexer.consume_peeked(); + let expr = Expr::Boolean(BooleanSpan { value: true, pos: else_span.pos }); + branches.push(IfBranchSpan { guard: expr, body: vec![] }); + if let Some(stmt) = self.parse_uniline()? { + branches[1].body.push(stmt); + } + } + + Ok(()) + } + + /// Parses the branches of a multiline `IF` statement. + fn parse_if_multiline( + &mut self, + if_pos: LineCol, + branches: &mut Vec, + ) -> Result<()> { + debug_assert!(!branches.is_empty(), "Caller must populate the guard of the first branch"); + + let mut i = 0; + let mut last = false; + loop { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eol => { + self.lexer.consume_peeked(); + } + + Token::Elseif => { + if last { + return Err(Error::Bad( + peeked.pos, + "Unexpected ELSEIF after ELSE".to_owned(), + )); + } + + self.lexer.consume_peeked(); + let expr = self.parse_required_expr("No expression in ELSEIF statement")?; + self.expect_and_consume(Token::Then, "No THEN in ELSEIF statement")?; + self.expect_and_consume(Token::Eol, "Expecting newline after THEN")?; + branches.push(IfBranchSpan { guard: expr, body: vec![] }); + i += 1; + } + + Token::Else => { + if last { + return Err(Error::Bad(peeked.pos, "Duplicate ELSE after ELSE".to_owned())); + } + + let else_span = self.lexer.consume_peeked(); + self.expect_and_consume(Token::Eol, "Expecting newline after ELSE")?; + + let expr = Expr::Boolean(BooleanSpan { value: true, pos: else_span.pos }); + branches.push(IfBranchSpan { guard: expr, body: vec![] }); + i += 1; + + last = true; + } + + Token::End => { + let token_span = self.lexer.consume_peeked(); + match self.maybe_parse_end(token_span.pos)? { + Ok(stmt) => { + branches[i].body.push(stmt); + } + Err(Token::If) => { + break; + } + Err(token) => { + return Err(Error::Bad( + token_span.pos, + format!("END {} without {}", token, token), + )); + } + } + } + + _ => match self.parse_one_safe()? { + Some(stmt) => { + branches[i].body.push(stmt); + } + None => { + break; + } + }, + } + } + + self.expect_and_consume_with_pos(Token::If, if_pos, "IF without END IF") + } + + /// Parses an `IF` statement. + fn parse_if(&mut self, if_pos: LineCol) -> Result { + let expr = self.parse_required_expr("No expression in IF statement")?; + self.expect_and_consume(Token::Then, "No THEN in IF statement")?; + + let mut branches = vec![IfBranchSpan { guard: expr, body: vec![] }]; + + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eol | Token::Eof => self.parse_if_multiline(if_pos, &mut branches)?, + _ => self.parse_if_uniline(&mut branches)?, + } + + Ok(Statement::If(IfSpan { branches })) + } + + /// Advances until the next statement after failing to parse an `IF` statement. + fn reset_if(&mut self, if_pos: LineCol) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::End => { + self.lexer.consume_peeked(); + self.expect_and_consume_with_pos(Token::If, if_pos, "IF without END IF")?; + break; + } + _ => { + self.lexer.consume_peeked(); + } + } + } + self.reset() + } + + /// Extracts the optional `STEP` part of a `FOR` statement, with a default of 1. + /// + /// Returns the step as an expression, an `Ordering` value representing how the step value + /// compares to zero, and whether the step is a double or not. + fn parse_step(&mut self) -> Result<(Expr, Ordering, bool)> { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Step => self.lexer.consume_peeked(), + _ => { + // The position we return here for the step isn't truly the right value, but given + // that we know the hardcoded step of 1 is valid, the caller will not error out and + // will not print the slightly invalid position. + return Ok(( + Expr::Integer(IntegerSpan { value: 1, pos: peeked.pos }), + Ordering::Greater, + false, + )); + } + }; + + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Double(d) => { + let peeked = self.lexer.consume_peeked(); + let sign = if d == 0.0 { Ordering::Equal } else { Ordering::Greater }; + Ok((Expr::Double(DoubleSpan { value: d, pos: peeked.pos }), sign, true)) + } + Token::Integer(i) => { + let peeked = self.lexer.consume_peeked(); + Ok((Expr::Integer(IntegerSpan { value: i, pos: peeked.pos }), i.cmp(&0), false)) + } + Token::Minus => { + self.lexer.consume_peeked(); + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Double(d) => { + let peeked = self.lexer.consume_peeked(); + let sign = if d == 0.0 { Ordering::Equal } else { Ordering::Less }; + Ok((Expr::Double(DoubleSpan { value: -d, pos: peeked.pos }), sign, true)) + } + Token::Integer(i) => { + let peeked = self.lexer.consume_peeked(); + Ok(( + Expr::Integer(IntegerSpan { value: -i, pos: peeked.pos }), + (-i).cmp(&0), + false, + )) + } + _ => Err(Error::Bad(peeked.pos, "STEP needs a literal number".to_owned())), + } + } + _ => Err(Error::Bad(peeked.pos, "STEP needs a literal number".to_owned())), + } + } + + /// Parses a `FOR` statement. + fn parse_for(&mut self, for_pos: LineCol) -> Result { + let token_span = self.lexer.read()?; + let iterator = match token_span.token { + Token::Symbol(iterator) => match iterator.ref_type { + None | Some(ExprType::Double) | Some(ExprType::Integer) => iterator, + _ => { + return Err(Error::Bad( + token_span.pos, + "Iterator name in FOR statement must be a numeric reference".to_owned(), + )); + } + }, + _ => { + return Err(Error::Bad( + token_span.pos, + "No iterator name in FOR statement".to_owned(), + )); + } + }; + let iterator_pos = token_span.pos; + + self.expect_and_consume(Token::Equal, "No equal sign in FOR statement")?; + let start = self.parse_required_expr("No start expression in FOR statement")?; + + let to_span = self.expect_and_consume(Token::To, "No TO in FOR statement")?; + let end = self.parse_required_expr("No end expression in FOR statement")?; + + let (step, step_sign, iter_double) = self.parse_step()?; + let end_condition = match step_sign { + Ordering::Greater => Expr::LessEqual(Box::from(BinaryOpSpan { + lhs: Expr::Symbol(SymbolSpan { vref: iterator.clone(), pos: iterator_pos }), + rhs: end, + pos: to_span.pos, + })), + Ordering::Less => Expr::GreaterEqual(Box::from(BinaryOpSpan { + lhs: Expr::Symbol(SymbolSpan { vref: iterator.clone(), pos: iterator_pos }), + rhs: end, + pos: to_span.pos, + })), + Ordering::Equal => { + return Err(Error::Bad( + step.start_pos(), + "Infinite FOR loop; STEP cannot be 0".to_owned(), + )); + } + }; + + let next_value = Expr::Add(Box::from(BinaryOpSpan { + lhs: Expr::Symbol(SymbolSpan { vref: iterator.clone(), pos: iterator_pos }), + rhs: step, + pos: to_span.pos, + })); + + self.expect_and_consume(Token::Eol, "Expecting newline after FOR")?; + + let stmts = self.parse_until(Token::Next)?; + self.expect_and_consume_with_pos(Token::Next, for_pos, "FOR without NEXT")?; + + Ok(Statement::For(ForSpan { + iter: iterator, + iter_pos: iterator_pos, + iter_double, + start, + end: end_condition, + next: next_value, + body: stmts, + })) + } + + /// Advances until the next statement after failing to parse a `FOR` statement. + fn reset_for(&mut self) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::Next => { + self.lexer.consume_peeked(); + break; + } + _ => { + self.lexer.consume_peeked(); + } + } + } + self.reset() + } + + /// Parses the optional parameter list that may appear after a `FUNCTION` or `SUB` definition, + /// including the opening and closing parenthesis. + fn parse_callable_args(&mut self) -> Result> { + let mut params = vec![]; + let peeked = self.lexer.peek()?; + if peeked.token == Token::LeftParen { + self.lexer.consume_peeked(); + + loop { + let token_span = self.lexer.read()?; + match token_span.token { + Token::Symbol(param) => { + let peeked = self.lexer.peek()?; + if peeked.token == Token::As { + self.lexer.consume_peeked(); + + let name = vref_to_unannotated_string(param, token_span.pos)?; + let (vtype, _pos) = self.parse_as_type()?; + params.push(VarRef::new(name, Some(vtype))); + } else { + params.push(param); + } + } + _ => { + return Err(Error::Bad( + token_span.pos, + "Expected a parameter name".to_owned(), + )); + } + } + + let token_span = self.lexer.read()?; + match token_span.token { + Token::Comma => (), + Token::RightParen => break, + _ => { + return Err(Error::Bad( + token_span.pos, + "Expected comma, AS, or end of parameters list".to_owned(), + )); + } + } + } + } + Ok(params) + } + + /// Parses the body of a callable and returns the collection of statements and the position + /// of the end of the body. + fn parse_callable_body( + &mut self, + start_pos: LineCol, + exp_token: Token, + ) -> Result<(Vec, LineCol)> { + debug_assert!(matches!(exp_token, Token::Function | Token::Sub)); + + let mut body = vec![]; + let end_pos; + loop { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eof => { + end_pos = peeked.pos; + break; + } + + Token::Eol => { + self.lexer.consume_peeked(); + } + + Token::Function | Token::Sub => { + return Err(Error::Bad( + peeked.pos, + "Cannot nest FUNCTION or SUB definitions".to_owned(), + )); + } + + Token::End => { + let end_span = self.lexer.consume_peeked(); + match self.maybe_parse_end(end_span.pos)? { + Ok(stmt) => { + body.push(stmt); + } + Err(token) if token == exp_token => { + end_pos = end_span.pos; + break; + } + Err(token) => { + return Err(Error::Bad( + end_span.pos, + format!("END {} without {}", token, token), + )); + } + } + } + + _ => match self.parse_one_safe()? { + Some(stmt) => body.push(stmt), + None => { + return Err(Error::Bad( + start_pos, + format!("{} without END {}", exp_token, exp_token), + )); + } + }, + } + } + + self.expect_and_consume_with_pos( + exp_token.clone(), + start_pos, + format!("{} without END {}", exp_token, exp_token), + )?; + + Ok((body, end_pos)) + } + + /// Parses a `DECLARE` statement. + fn parse_declare(&mut self) -> Result { + let token_span = self.lexer.read()?; + let (name, name_pos, params) = match token_span.token { + Token::Function => self.parse_callable_signature(true, true)?, + + Token::Sub => self.parse_callable_signature(true, false)?, + + _ => { + return Err(Error::Bad( + token_span.pos, + "Expected FUNCTION or SUB after DECLARE".to_owned(), + )); + } + }; + Ok(Statement::Declare(DeclareSpan { name, name_pos, params })) + } + + /// Parses the signature of a callable declaration or definition. + fn parse_callable_signature( + &mut self, + is_declare: bool, + is_function: bool, + ) -> Result<(VarRef, LineCol, Vec)> { + let kw_name = if is_function { "FUNCTION" } else { "SUB" }; + let token_span = self.lexer.read()?; + let name = match token_span.token { + Token::Symbol(name) => match (name.ref_type, is_function) { + (None, true) => VarRef::new(name.name, Some(ExprType::Integer)), + (Some(..), true) => name, + (None, false) => name, + (Some(..), false) => { + return Err(Error::Bad( + token_span.pos, + "SUBs cannot return a value so type annotations are not allowed".to_owned(), + )); + } + }, + _ => { + return Err(Error::Bad( + token_span.pos, + format!("Expected a name after {}", kw_name), + )); + } + }; + let name_pos = token_span.pos; + + let params = self.parse_callable_args()?; + + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eol => (), + Token::Eof if is_declare => (), + _ => { + return Err(Error::Bad( + peeked.pos, + format!("Expected newline after {} name", kw_name), + )); + } + } + + Ok((name, name_pos, params)) + } + + /// Parses a `FUNCTION` definition. + fn parse_function(&mut self, function_pos: LineCol) -> Result { + let (name, name_pos, params) = self.parse_callable_signature(false, true)?; + let (body, end_pos) = self.parse_callable_body(function_pos, Token::Function)?; + Ok(Statement::Callable(CallableSpan { name, name_pos, params, body, end_pos })) + } + + /// Parses a `SUB` definition. + fn parse_sub(&mut self, sub_pos: LineCol) -> Result { + let (name, name_pos, params) = self.parse_callable_signature(false, false)?; + let (body, end_pos) = self.parse_callable_body(sub_pos, Token::Sub)?; + Ok(Statement::Callable(CallableSpan { name, name_pos, params, body, end_pos })) + } + + /// Advances until the next statement after failing to parse a `FUNCTION` or `SUB` definition. + fn reset_callable(&mut self, exp_token: Token) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::End => { + self.lexer.consume_peeked(); + + let token_span = self.lexer.read()?; + if token_span.token == exp_token { + break; + } + } + _ => { + self.lexer.consume_peeked(); + } + } + } + self.reset() + } + + /// Parses an `ON ERROR` statement. Only `ON` has been consumed so far. + fn parse_on(&mut self, pos: LineCol) -> Result { + self.expect_and_consume(Token::Error, "Expected ERROR after ON")?; + + let token_span = self.lexer.read()?; + match token_span.token { + Token::Goto => { + let token_span = self.lexer.read()?; + match token_span.token { + Token::Integer(0) => Ok(Statement::OnError(OnErrorSpan::Reset(pos))), + Token::Integer(i) => Ok(Statement::OnError(OnErrorSpan::Goto( + GotoSpan { target: format!("{}", i), target_pos: token_span.pos }, + pos, + ))), + Token::Label(target) => Ok(Statement::OnError(OnErrorSpan::Goto( + GotoSpan { target, target_pos: token_span.pos }, + pos, + ))), + _ => Err(Error::Bad( + token_span.pos, + "Expected label name or 0 after ON ERROR GOTO".to_owned(), + )), + } + } + Token::Resume => { + self.expect_and_consume(Token::Next, "Expected NEXT after ON ERROR RESUME")?; + Ok(Statement::OnError(OnErrorSpan::ResumeNext(pos))) + } + _ => { + Err(Error::Bad(token_span.pos, "Expected GOTO or RESUME after ON ERROR".to_owned())) + } + } + } + + /// Parses the guards after a `CASE` keyword. + fn parse_case_guards(&mut self) -> Result> { + let mut guards = vec![]; + + loop { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Else => { + let token_span = self.lexer.consume_peeked(); + + if !guards.is_empty() { + return Err(Error::Bad( + token_span.pos, + "CASE ELSE must be on its own".to_owned(), + )); + } + + let peeked = self.lexer.peek()?; + if peeked.token != Token::Eol && peeked.token != Token::Eof { + return Err(Error::Bad( + peeked.pos, + "Expected newline after CASE ELSE".to_owned(), + )); + } + + break; + } + + Token::Is => { + self.lexer.consume_peeked(); + + let token_span = self.lexer.read()?; + let rel_op = match token_span.token { + Token::Equal => CaseRelOp::Equal, + Token::NotEqual => CaseRelOp::NotEqual, + Token::Less => CaseRelOp::Less, + Token::LessEqual => CaseRelOp::LessEqual, + Token::Greater => CaseRelOp::Greater, + Token::GreaterEqual => CaseRelOp::GreaterEqual, + _ => { + return Err(Error::Bad( + token_span.pos, + "Expected relational operator".to_owned(), + )); + } + }; + + let expr = + self.parse_required_expr("Missing expression after relational operator")?; + guards.push(CaseGuardSpan::Is(rel_op, expr)); + } + + _ => { + let from_expr = self.parse_required_expr("Missing expression in CASE guard")?; + + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eol | Token::Comma => { + guards.push(CaseGuardSpan::Is(CaseRelOp::Equal, from_expr)); + } + Token::To => { + self.lexer.consume_peeked(); + let to_expr = self + .parse_required_expr("Missing expression after TO in CASE guard")?; + guards.push(CaseGuardSpan::To(from_expr, to_expr)); + } + _ => { + return Err(Error::Bad( + peeked.pos, + "Expected comma, newline, or TO after expression".to_owned(), + )); + } + } + } + } + + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eol => { + break; + } + Token::Comma => { + self.lexer.consume_peeked(); + } + _ => { + return Err(Error::Bad( + peeked.pos, + "Expected comma, newline, or TO after expression".to_owned(), + )); + } + } + } + + Ok(guards) + } + + /// Parses a `SELECT` statement. + fn parse_select(&mut self, select_pos: LineCol) -> Result { + self.expect_and_consume(Token::Case, "Expecting CASE after SELECT")?; + + let expr = self.parse_required_expr("No expression in SELECT CASE statement")?; + self.expect_and_consume(Token::Eol, "Expecting newline after SELECT CASE")?; + + let mut cases = vec![]; + + let mut i = 0; + let mut last = false; + let end_pos; + loop { + let peeked = self.lexer.peek()?; + match peeked.token { + Token::Eof => { + end_pos = peeked.pos; + break; + } + + Token::Eol => { + self.lexer.consume_peeked(); + } + + Token::Case => { + let peeked = self.lexer.consume_peeked(); + let guards = self.parse_case_guards()?; + self.expect_and_consume(Token::Eol, "Expecting newline after CASE")?; + + let is_last = guards.is_empty(); + if last { + if is_last { + return Err(Error::Bad( + peeked.pos, + "CASE ELSE must be unique".to_owned(), + )); + } else { + return Err(Error::Bad(peeked.pos, "CASE ELSE is not last".to_owned())); + } + } + last |= is_last; + + cases.push(CaseSpan { guards, body: vec![] }); + if cases.len() > 1 { + i += 1; + } + } + + Token::End => { + let end_span = self.lexer.consume_peeked(); + match self.maybe_parse_end(end_span.pos)? { + Ok(stmt) => { + if cases.is_empty() { + return Err(Error::Bad( + end_span.pos, + "Expected CASE after SELECT CASE before any statement" + .to_owned(), + )); + } + + cases[i].body.push(stmt); + } + Err(Token::Select) => { + end_pos = end_span.pos; + break; + } + Err(token) => { + if cases.is_empty() { + return Err(Error::Bad( + end_span.pos, + "Expected CASE after SELECT CASE before any statement" + .to_owned(), + )); + } else { + return Err(Error::Bad( + end_span.pos, + format!("END {} without {}", token, token), + )); + } + } + } + } + + _ => { + if cases.is_empty() { + return Err(Error::Bad( + peeked.pos, + "Expected CASE after SELECT CASE before any statement".to_owned(), + )); + } + + if let Some(stmt) = self.parse_one_safe()? { + cases[i].body.push(stmt); + } + } + } + } + + self.expect_and_consume_with_pos(Token::Select, select_pos, "SELECT without END SELECT")?; + + Ok(Statement::Select(SelectSpan { expr, cases, end_pos })) + } + + /// Advances until the next statement after failing to parse a `SELECT` statement. + fn reset_select(&mut self, select_pos: LineCol) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::End => { + self.lexer.consume_peeked(); + self.expect_and_consume_with_pos( + Token::Select, + select_pos, + "SELECT without END SELECT", + )?; + break; + } + _ => { + self.lexer.consume_peeked(); + } + } + } + self.reset() + } + + /// Parses a `WHILE` statement. + fn parse_while(&mut self, while_pos: LineCol) -> Result { + let expr = self.parse_required_expr("No expression in WHILE statement")?; + self.expect_and_consume(Token::Eol, "Expecting newline after WHILE")?; + + let stmts = self.parse_until(Token::Wend)?; + self.expect_and_consume_with_pos(Token::Wend, while_pos, "WHILE without WEND")?; + + Ok(Statement::While(WhileSpan { expr, body: stmts })) + } + + /// Advances until the next statement after failing to parse a `WHILE` statement. + fn reset_while(&mut self) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::Wend => { + self.lexer.consume_peeked(); + break; + } + _ => { + self.lexer.consume_peeked(); + } + } + } + self.reset() + } + + /// Extracts the next available uniline statement from the input stream, or `None` if none is + /// available. + /// + /// The statement must be specifiable in a single line as part of a uniline `IF` statement, and + /// we currently expect this to only be used while parsing an `IF`. + /// + /// On success, the stream is left in a position where the next statement can be extracted. + /// On failure, the caller must advance the stream to the next statement by calling `reset`. + fn parse_uniline(&mut self) -> Result> { + let token_span = self.lexer.read()?; + match token_span.token { + Token::Data => Ok(Some(self.parse_data()?)), + Token::End => Ok(Some(self.parse_end(token_span.pos)?)), + Token::Eof | Token::Eol => Ok(None), + Token::Exit => Ok(Some(self.parse_exit(token_span.pos)?)), + Token::Gosub => Ok(Some(self.parse_gosub()?)), + Token::Goto => Ok(Some(self.parse_goto()?)), + Token::On => Ok(Some(self.parse_on(token_span.pos)?)), + Token::Return => Ok(Some(Statement::Return(ReturnSpan { pos: token_span.pos }))), + Token::Symbol(vref) => { + let peeked = self.lexer.peek()?; + if peeked.token == Token::Equal { + self.lexer.consume_peeked(); + Ok(Some(self.parse_assignment(vref, token_span.pos)?)) + } else { + Ok(Some(self.parse_array_or_builtin_call(vref, token_span.pos)?)) + } + } + Token::Bad(msg) => Err(Error::Bad(token_span.pos, msg)), + t => Err(Error::Bad(token_span.pos, format!("Unexpected {} in uniline IF branch", t))), + } + } + + /// Extracts the next available statement from the input stream, or `None` if none is available. + /// + /// On success, the stream is left in a position where the next statement can be extracted. + /// On failure, the caller must advance the stream to the next statement by calling `reset`. + fn parse_one(&mut self) -> Result> { + loop { + match self.lexer.peek()?.token { + Token::Eol => { + self.lexer.consume_peeked(); + } + Token::Eof => return Ok(None), + _ => break, + } + } + let token_span = self.lexer.read()?; + let res = match token_span.token { + Token::Data => Ok(Some(self.parse_data()?)), + Token::Declare => Ok(Some(self.parse_declare()?)), + Token::Dim => Ok(Some(self.parse_dim()?)), + Token::Do => { + let result = self.parse_do(token_span.pos); + if result.is_err() { + self.reset_do()?; + } + Ok(Some(result?)) + } + Token::End => Ok(Some(self.parse_end(token_span.pos)?)), + Token::Eof => return Ok(None), + Token::Eol => Ok(None), + Token::Exit => Ok(Some(self.parse_exit(token_span.pos)?)), + Token::If => { + let result = self.parse_if(token_span.pos); + if result.is_err() { + self.reset_if(token_span.pos)?; + } + Ok(Some(result?)) + } + Token::For => { + let result = self.parse_for(token_span.pos); + if result.is_err() { + self.reset_for()?; + } + Ok(Some(result?)) + } + Token::Function => { + let result = self.parse_function(token_span.pos); + if result.is_err() { + self.reset_callable(Token::Function)?; + } + Ok(Some(result?)) + } + Token::Gosub => { + let result = self.parse_gosub(); + Ok(Some(result?)) + } + Token::Goto => { + let result = self.parse_goto(); + Ok(Some(result?)) + } + Token::Integer(i) => { + let name = format!("{}", i); + // When we encounter a line number, we must return early to avoid looking for a line + // ending given that the next statement may start after the label we found. + return Ok(Some(Statement::Label(LabelSpan { name, name_pos: token_span.pos }))); + } + Token::Label(name) => { + // When we encounter a label, we must return early to avoid looking for a line + // ending given that the next statement may start after the label we found. + return Ok(Some(Statement::Label(LabelSpan { name, name_pos: token_span.pos }))); + } + Token::On => Ok(Some(self.parse_on(token_span.pos)?)), + Token::Return => Ok(Some(Statement::Return(ReturnSpan { pos: token_span.pos }))), + Token::Select => { + let result = self.parse_select(token_span.pos); + if result.is_err() { + self.reset_select(token_span.pos)?; + } + Ok(Some(result?)) + } + Token::Sub => { + let result = self.parse_sub(token_span.pos); + if result.is_err() { + self.reset_callable(Token::Sub)?; + } + Ok(Some(result?)) + } + Token::Symbol(vref) => { + let peeked = self.lexer.peek()?; + if peeked.token == Token::Equal { + self.lexer.consume_peeked(); + Ok(Some(self.parse_assignment(vref, token_span.pos)?)) + } else { + Ok(Some(self.parse_array_or_builtin_call(vref, token_span.pos)?)) + } + } + Token::While => { + let result = self.parse_while(token_span.pos); + if result.is_err() { + self.reset_while()?; + } + Ok(Some(result?)) + } + Token::Bad(msg) => return Err(Error::Bad(token_span.pos, msg)), + t => return Err(Error::Bad(token_span.pos, format!("Unexpected {} in statement", t))), + }; + + let token_span = self.lexer.peek()?; + match token_span.token { + Token::Eof => (), + Token::Eol => { + self.lexer.consume_peeked(); + } + _ => { + return Err(Error::Bad( + token_span.pos, + format!("Expected newline but found {}", token_span.token), + )); + } + }; + + res + } + + /// Advances until the next statement after failing to parse a single statement. + fn reset(&mut self) -> Result<()> { + loop { + match self.lexer.peek()?.token { + Token::Eof => break, + Token::Eol => { + self.lexer.consume_peeked(); + break; + } + _ => { + self.lexer.consume_peeked(); + } + } + } + Ok(()) + } + + /// Extracts the next available statement from the input stream, or `None` if none is available. + /// + /// The stream is always left in a position where the next statement extraction can be tried. + fn parse_one_safe(&mut self) -> Result> { + let result = self.parse_one(); + if result.is_err() { + self.reset()?; + } + result + } +} + +/// Iterator that yields parsed statements from an input stream. +pub(crate) struct StatementIter<'a> { + /// The underlying parser. + parser: Parser<'a>, +} + +impl Iterator for StatementIter<'_> { + type Item = Result; + + fn next(&mut self) -> Option { + self.parser.parse_one_safe().transpose() + } +} + +/// Extracts all statements from the input stream. +pub(crate) fn parse(input: &mut dyn io::Read) -> StatementIter<'_> { + StatementIter { parser: Parser::from(input) } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::ast::ExprType; + + /// Syntactic sugar to instantiate a `LineCol` for testing. + fn lc(line: usize, col: usize) -> LineCol { + LineCol { line, col } + } + + /// Syntactic sugar to instantiate an `Expr::Boolean` for testing. + fn expr_boolean(value: bool, line: usize, col: usize) -> Expr { + Expr::Boolean(BooleanSpan { value, pos: LineCol { line, col } }) + } + + /// Syntactic sugar to instantiate an `Expr::Double` for testing. + fn expr_double(value: f64, line: usize, col: usize) -> Expr { + Expr::Double(DoubleSpan { value, pos: LineCol { line, col } }) + } + + /// Syntactic sugar to instantiate an `Expr::Integer` for testing. + fn expr_integer(value: i32, line: usize, col: usize) -> Expr { + Expr::Integer(IntegerSpan { value, pos: LineCol { line, col } }) + } + + /// Syntactic sugar to instantiate an `Expr::Text` for testing. + fn expr_text>(value: S, line: usize, col: usize) -> Expr { + Expr::Text(TextSpan { value: value.into(), pos: LineCol { line, col } }) + } + + /// Syntactic sugar to instantiate an `Expr::Symbol` for testing. + fn expr_symbol(vref: VarRef, line: usize, col: usize) -> Expr { + Expr::Symbol(SymbolSpan { vref, pos: LineCol { line, col } }) + } + + #[test] + fn test_varref_to_unannotated_string() { + assert_eq!( + "print", + &vref_to_unannotated_string(VarRef::new("print", None), LineCol { line: 0, col: 0 }) + .unwrap() + ); + + assert_eq!( + "7:6: Type annotation not allowed in print$", + format!( + "{}", + &vref_to_unannotated_string( + VarRef::new("print", Some(ExprType::Text)), + LineCol { line: 7, col: 6 } + ) + .unwrap_err() + ) + ); + } + + /// Runs the parser on the given `input` and expects the returned statements to match + /// `exp_statements`. + fn do_ok_test(input: &str, exp_statements: &[Statement]) { + let mut input = input.as_bytes(); + let statements = + parse(&mut input).map(|r| r.expect("Parsing failed")).collect::>(); + assert_eq!(exp_statements, statements.as_slice()); + } + + /// Runs the parser on the given `input` and expects the `err` error message. + fn do_error_test(input: &str, expected_err: &str) { + let mut input = input.as_bytes(); + let mut parser = Parser::from(&mut input); + assert_eq!( + expected_err, + format!("{}", parser.parse_one_safe().expect_err("Parsing did not fail")) + ); + assert!(parser.parse_one_safe().unwrap().is_none()); + } + + /// Runs the parser on the given `input` and expects the `err` error message. + /// + /// Does not expect the parser to be reset to the next (EOF) statement. + // TODO(jmmv): Need better testing to ensure the parser is reset to something that can be + // parsed next. + fn do_error_test_no_reset(input: &str, expected_err: &str) { + let mut input = input.as_bytes(); + for result in parse(&mut input) { + if let Err(e) = result { + assert_eq!(expected_err, format!("{}", e)); + return; + } + } + panic!("Parsing did not fail") + } + + #[test] + fn test_empty() { + do_ok_test("", &[]); + } + + #[test] + fn test_statement_separators() { + do_ok_test( + "a=1\nb=2:c=3:' A comment: that follows\nd=4", + &[ + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("a", None), + vref_pos: lc(1, 1), + expr: expr_integer(1, 1, 3), + }), + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("b", None), + vref_pos: lc(2, 1), + expr: expr_integer(2, 2, 3), + }), + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("c", None), + vref_pos: lc(2, 5), + expr: expr_integer(3, 2, 7), + }), + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("d", None), + vref_pos: lc(3, 1), + expr: expr_integer(4, 3, 3), + }), + ], + ); + } + + #[test] + fn test_array_assignments() { + do_ok_test( + "a(1)=100\nfoo(2, 3)=\"text\"\nabc$ (5 + z, 6) = TRUE OR FALSE", + &[ + Statement::ArrayAssignment(ArrayAssignmentSpan { + vref: VarRef::new("a", None), + vref_pos: lc(1, 1), + subscripts: vec![expr_integer(1, 1, 3)], + expr: expr_integer(100, 1, 6), + }), + Statement::ArrayAssignment(ArrayAssignmentSpan { + vref: VarRef::new("foo", None), + vref_pos: lc(2, 1), + subscripts: vec![expr_integer(2, 2, 5), expr_integer(3, 2, 8)], + expr: expr_text("text", 2, 11), + }), + Statement::ArrayAssignment(ArrayAssignmentSpan { + vref: VarRef::new("abc", Some(ExprType::Text)), + vref_pos: lc(3, 1), + subscripts: vec![ + Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_integer(5, 3, 7), + rhs: expr_symbol(VarRef::new("z".to_owned(), None), 3, 11), + pos: lc(3, 9), + })), + expr_integer(6, 3, 14), + ], + expr: Expr::Or(Box::from(BinaryOpSpan { + lhs: expr_boolean(true, 3, 19), + rhs: expr_boolean(false, 3, 27), + pos: lc(3, 24), + })), + }), + ], + ); + } + + #[test] + fn test_array_assignment_errors() { + do_error_test("a(", "1:3: Unexpected <>"); + do_error_test("a()", "1:2: Expected expression"); + do_error_test("a() =", "1:6: Missing expression in array assignment"); + do_error_test("a() IF", "1:2: Expected expression"); + do_error_test("a() = 3 4", "1:9: Unexpected value in expression"); + do_error_test("a() = 3 THEN", "1:9: Unexpected THEN in array assignment"); + do_error_test("a(,) = 3", "1:3: Missing expression"); + do_error_test("a(2;3) = 3", "1:4: Unexpected ;"); + do_error_test("(2) = 3", "1:1: Unexpected ( in statement"); + } + + #[test] + fn test_assignments() { + do_ok_test( + "a=1\nfoo$ = \"bar\"\nb$ = 3 + z", + &[ + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("a", None), + vref_pos: lc(1, 1), + expr: expr_integer(1, 1, 3), + }), + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("foo", Some(ExprType::Text)), + vref_pos: lc(2, 1), + expr: expr_text("bar", 2, 8), + }), + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("b", Some(ExprType::Text)), + vref_pos: lc(3, 1), + expr: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_integer(3, 3, 6), + rhs: expr_symbol(VarRef::new("z", None), 3, 10), + pos: lc(3, 8), + })), + }), + ], + ); + } + + #[test] + fn test_assignment_errors() { + do_error_test("a =", "1:4: Missing expression in assignment"); + do_error_test("a = b 3", "1:7: Unexpected value in expression"); + do_error_test("a = b, 3", "1:6: Unexpected , in assignment"); + do_error_test("a = if 3", "1:5: Unexpected keyword in expression"); + do_error_test("true = 1", "1:1: Unexpected TRUE in statement"); + } + + #[test] + fn test_builtin_calls() { + do_ok_test( + "PRINT a\nPRINT ; 3 , c$\nNOARGS\nNAME 3 AS 4", + &[ + Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ArgSpan { + expr: Some(expr_symbol(VarRef::new("a", None), 1, 7)), + sep: ArgSep::End, + sep_pos: lc(1, 8), + }], + }), + Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(2, 1), + args: vec![ + ArgSpan { expr: None, sep: ArgSep::Short, sep_pos: lc(2, 7) }, + ArgSpan { + expr: Some(expr_integer(3, 2, 9)), + sep: ArgSep::Long, + sep_pos: lc(2, 11), + }, + ArgSpan { + expr: Some(expr_symbol(VarRef::new("c", Some(ExprType::Text)), 2, 13)), + sep: ArgSep::End, + sep_pos: lc(2, 15), + }, + ], + }), + Statement::Call(CallSpan { + vref: VarRef::new("NOARGS", None), + vref_pos: lc(3, 1), + args: vec![], + }), + Statement::Call(CallSpan { + vref: VarRef::new("NAME", None), + vref_pos: lc(4, 1), + args: vec![ + ArgSpan { + expr: Some(expr_integer(3, 4, 6)), + sep: ArgSep::As, + sep_pos: lc(4, 8), + }, + ArgSpan { + expr: Some(expr_integer(4, 4, 11)), + sep: ArgSep::End, + sep_pos: lc(4, 12), + }, + ], + }), + ], + ); + } + + #[test] + fn test_builtin_calls_and_array_references_disambiguation() { + use Expr::*; + + do_ok_test( + "PRINT(1)", + &[Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ArgSpan { + expr: Some(expr_integer(1, 1, 7)), + sep: ArgSep::End, + sep_pos: lc(1, 9), + }], + })], + ); + + do_ok_test( + "PRINT(1), 2", + &[Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ + ArgSpan { + expr: Some(expr_integer(1, 1, 7)), + sep: ArgSep::Long, + sep_pos: lc(1, 9), + }, + ArgSpan { + expr: Some(expr_integer(2, 1, 11)), + sep: ArgSep::End, + sep_pos: lc(1, 12), + }, + ], + })], + ); + + do_ok_test( + "PRINT(1); 2", + &[Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ + ArgSpan { + expr: Some(expr_integer(1, 1, 7)), + sep: ArgSep::Short, + sep_pos: lc(1, 9), + }, + ArgSpan { + expr: Some(expr_integer(2, 1, 11)), + sep: ArgSep::End, + sep_pos: lc(1, 12), + }, + ], + })], + ); + + do_ok_test( + "PRINT(1);", + &[Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ + ArgSpan { + expr: Some(expr_integer(1, 1, 7)), + sep: ArgSep::Short, + sep_pos: lc(1, 9), + }, + ArgSpan { expr: None, sep: ArgSep::End, sep_pos: lc(1, 10) }, + ], + })], + ); + + do_ok_test( + "PRINT(1) + 2; 3", + &[Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ + ArgSpan { + expr: Some(Add(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 12), + pos: lc(1, 10), + }))), + sep: ArgSep::Short, + sep_pos: lc(1, 13), + }, + ArgSpan { + expr: Some(expr_integer(3, 1, 15)), + sep: ArgSep::End, + sep_pos: lc(1, 16), + }, + ], + })], + ); + } + + #[test] + fn test_builtin_calls_errors() { + do_error_test("FOO 3 5\n", "1:7: Unexpected value in expression"); + do_error_test("INPUT$ a\n", "1:1: Type annotation not allowed in INPUT$"); + do_error_test("PRINT IF 1\n", "1:7: Unexpected keyword in expression"); + do_error_test("PRINT 3, IF 1\n", "1:10: Unexpected keyword in expression"); + do_error_test("PRINT 3 THEN\n", "1:9: Expected comma, semicolon, or end of statement"); + do_error_test("PRINT ()\n", "1:7: Expected expression"); + do_error_test("PRINT (2, 3)\n", "1:7: Expected expression"); + do_error_test("PRINT (2, 3); 4\n", "1:7: Expected expression"); + } + + #[test] + fn test_data() { + do_ok_test("DATA", &[Statement::Data(DataSpan { values: vec![None] })]); + + do_ok_test("DATA , ", &[Statement::Data(DataSpan { values: vec![None, None] })]); + do_ok_test( + "DATA , , ,", + &[Statement::Data(DataSpan { values: vec![None, None, None, None] })], + ); + + do_ok_test( + "DATA 1: DATA 2", + &[ + Statement::Data(DataSpan { + values: vec![Some(Expr::Integer(IntegerSpan { value: 1, pos: lc(1, 6) }))], + }), + Statement::Data(DataSpan { + values: vec![Some(Expr::Integer(IntegerSpan { value: 2, pos: lc(1, 14) }))], + }), + ], + ); + + do_ok_test( + "DATA TRUE, -3, 5.1, \"foo\"", + &[Statement::Data(DataSpan { + values: vec![ + Some(Expr::Boolean(BooleanSpan { value: true, pos: lc(1, 6) })), + Some(Expr::Integer(IntegerSpan { value: -3, pos: lc(1, 12) })), + Some(Expr::Double(DoubleSpan { value: 5.1, pos: lc(1, 16) })), + Some(Expr::Text(TextSpan { value: "foo".to_owned(), pos: lc(1, 21) })), + ], + })], + ); + + do_ok_test( + "DATA , TRUE, , 3, , 5.1, , \"foo\",", + &[Statement::Data(DataSpan { + values: vec![ + None, + Some(Expr::Boolean(BooleanSpan { value: true, pos: lc(1, 8) })), + None, + Some(Expr::Integer(IntegerSpan { value: 3, pos: lc(1, 16) })), + None, + Some(Expr::Double(DoubleSpan { value: 5.1, pos: lc(1, 21) })), + None, + Some(Expr::Text(TextSpan { value: "foo".to_owned(), pos: lc(1, 28) })), + None, + ], + })], + ); + + do_ok_test( + "DATA -3, -5.1", + &[Statement::Data(DataSpan { + values: vec![ + Some(Expr::Integer(IntegerSpan { value: -3, pos: lc(1, 6) })), + Some(Expr::Double(DoubleSpan { value: -5.1, pos: lc(1, 10) })), + ], + })], + ); + } + + #[test] + fn test_data_errors() { + do_error_test("DATA + 2", "1:6: Unexpected + in DATA statement"); + do_error_test("DATA ;", "1:6: Unexpected ; in DATA statement"); + do_error_test("DATA 5 + 1", "1:8: Expected comma after datum but found +"); + do_error_test("DATA 5 ; 1", "1:8: Expected comma after datum but found ;"); + do_error_test("DATA -FALSE", "1:6: Expected number after -"); + do_error_test("DATA -\"abc\"", "1:6: Expected number after -"); + do_error_test("DATA -foo", "1:6: Expected number after -"); + } + + #[test] + fn test_declare_callable_no_args_eof() { + do_ok_test( + "DECLARE FUNCTION foo$", + &[Statement::Declare(DeclareSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 18), + params: vec![], + })], + ); + + do_ok_test( + "DECLARE SUB foo", + &[Statement::Declare(DeclareSpan { + name: VarRef::new("foo", None), + name_pos: lc(1, 13), + params: vec![], + })], + ); + } + + #[test] + fn test_declare_callable_no_args_not_eof() { + do_ok_test( + "DECLARE FUNCTION foo$\nREM A comment", + &[Statement::Declare(DeclareSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 18), + params: vec![], + })], + ); + + do_ok_test( + "DECLARE SUB foo\nREM A comment", + &[Statement::Declare(DeclareSpan { + name: VarRef::new("foo", None), + name_pos: lc(1, 13), + params: vec![], + })], + ); + } + + #[test] + fn test_declare_callable_consecutive() { + do_ok_test( + "DECLARE FUNCTION foo$\nDECLARE SUB bar", + &[ + Statement::Declare(DeclareSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 18), + params: vec![], + }), + Statement::Declare(DeclareSpan { + name: VarRef::new("bar", None), + name_pos: lc(2, 13), + params: vec![], + }), + ], + ); + } + + #[test] + fn test_declare_callable_multiple_params() { + do_ok_test( + "DECLARE FUNCTION foo$(x$, y, z AS BOOLEAN)", + &[Statement::Declare(DeclareSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 18), + params: vec![ + VarRef::new("x", Some(ExprType::Text)), + VarRef::new("y", None), + VarRef::new("z", Some(ExprType::Boolean)), + ], + })], + ); + + do_ok_test( + "DECLARE SUB foo(x$, y, z AS BOOLEAN)", + &[Statement::Declare(DeclareSpan { + name: VarRef::new("foo", None), + name_pos: lc(1, 13), + params: vec![ + VarRef::new("x", Some(ExprType::Text)), + VarRef::new("y", None), + VarRef::new("z", Some(ExprType::Boolean)), + ], + })], + ); + } + + #[test] + fn test_declare_callable_errors() { + do_error_test("DECLARE", "1:8: Expected FUNCTION or SUB after DECLARE"); + do_error_test("DECLARE foo", "1:9: Expected FUNCTION or SUB after DECLARE"); + + do_error_test("DECLARE FUNCTION", "1:17: Expected a name after FUNCTION"); + do_error_test("DECLARE SUB", "1:12: Expected a name after SUB"); + + do_error_test("DECLARE FUNCTION foo()", "1:22: Expected a parameter name"); + do_error_test("DECLARE SUB foo()", "1:17: Expected a parameter name"); + + do_error_test( + "DECLARE SUB foo%", + "1:13: SUBs cannot return a value so type annotations are not allowed", + ); + } + + #[test] + fn test_dim_default_type() { + do_ok_test( + "DIM i", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + vtype: ExprType::Integer, + vtype_pos: lc(1, 6), + })], + ); + } + + #[test] + fn test_dim_as_simple_types() { + do_ok_test( + "DIM i AS BOOLEAN", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + vtype: ExprType::Boolean, + vtype_pos: lc(1, 10), + })], + ); + do_ok_test( + "DIM i AS DOUBLE", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + vtype: ExprType::Double, + vtype_pos: lc(1, 10), + })], + ); + do_ok_test( + "DIM i AS INTEGER", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + vtype: ExprType::Integer, + vtype_pos: lc(1, 10), + })], + ); + do_ok_test( + "DIM i AS STRING", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + vtype: ExprType::Text, + vtype_pos: lc(1, 10), + })], + ); + } + + #[test] + fn test_dim_consecutive() { + do_ok_test( + "DIM i\nDIM j AS BOOLEAN\nDIM k", + &[ + Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + vtype: ExprType::Integer, + vtype_pos: lc(1, 6), + }), + Statement::Dim(DimSpan { + name: "j".to_owned(), + name_pos: lc(2, 5), + shared: false, + vtype: ExprType::Boolean, + vtype_pos: lc(2, 10), + }), + Statement::Dim(DimSpan { + name: "k".to_owned(), + name_pos: lc(3, 5), + shared: false, + vtype: ExprType::Integer, + vtype_pos: lc(3, 6), + }), + ], + ); + } + + #[test] + fn test_dim_shared() { + do_ok_test( + "DIM SHARED i", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 12), + shared: true, + vtype: ExprType::Integer, + vtype_pos: lc(1, 13), + })], + ); + do_ok_test( + "DIM SHARED i AS BOOLEAN", + &[Statement::Dim(DimSpan { + name: "i".to_owned(), + name_pos: lc(1, 12), + shared: true, + vtype: ExprType::Boolean, + vtype_pos: lc(1, 17), + })], + ); + } + + #[test] + fn test_dim_array() { + use Expr::*; + + do_ok_test( + "DIM i(10)", + &[Statement::DimArray(DimArraySpan { + name: "i".to_owned(), + name_pos: lc(1, 5), + shared: false, + dimensions: vec![expr_integer(10, 1, 7)], + subtype: ExprType::Integer, + subtype_pos: lc(1, 10), + })], + ); + + do_ok_test( + "DIM foo(-5, 0) AS STRING", + &[Statement::DimArray(DimArraySpan { + name: "foo".to_owned(), + name_pos: lc(1, 5), + shared: false, + dimensions: vec![ + Negate(Box::from(UnaryOpSpan { expr: expr_integer(5, 1, 10), pos: lc(1, 9) })), + expr_integer(0, 1, 13), + ], + subtype: ExprType::Text, + subtype_pos: lc(1, 19), + })], + ); + + do_ok_test( + "DIM foo(bar$() + 3, 8, -1)", + &[Statement::DimArray(DimArraySpan { + name: "foo".to_owned(), + name_pos: lc(1, 5), + shared: false, + dimensions: vec![ + Add(Box::from(BinaryOpSpan { + lhs: Call(CallSpan { + vref: VarRef::new("bar", Some(ExprType::Text)), + vref_pos: lc(1, 9), + args: vec![], + }), + rhs: expr_integer(3, 1, 18), + pos: lc(1, 16), + })), + expr_integer(8, 1, 21), + Negate(Box::from(UnaryOpSpan { expr: expr_integer(1, 1, 25), pos: lc(1, 24) })), + ], + subtype: ExprType::Integer, + subtype_pos: lc(1, 27), + })], + ); + + do_ok_test( + "DIM SHARED i(10)", + &[Statement::DimArray(DimArraySpan { + name: "i".to_owned(), + name_pos: lc(1, 12), + shared: true, + dimensions: vec![expr_integer(10, 1, 14)], + subtype: ExprType::Integer, + subtype_pos: lc(1, 17), + })], + ); + } + + #[test] + fn test_dim_errors() { + do_error_test("DIM", "1:4: Expected variable name after DIM"); + do_error_test("DIM 3", "1:5: Expected variable name after DIM"); + do_error_test("DIM AS", "1:5: Expected variable name after DIM"); + do_error_test("DIM foo 3", "1:9: Expected AS or end of statement"); + do_error_test("DIM a AS", "1:9: Invalid type name <> in AS type definition"); + do_error_test("DIM a$ AS", "1:5: Type annotation not allowed in a$"); + do_error_test("DIM a AS 3", "1:10: Invalid type name 3 in AS type definition"); + do_error_test("DIM a AS INTEGER 3", "1:18: Unexpected 3 in DIM statement"); + + do_error_test("DIM a()", "1:6: Arrays require at least one dimension"); + do_error_test("DIM a(,)", "1:7: Missing expression"); + do_error_test("DIM a(, 3)", "1:7: Missing expression"); + do_error_test("DIM a(3, )", "1:10: Missing expression"); + do_error_test("DIM a(3, , 4)", "1:10: Missing expression"); + do_error_test("DIM a(1) AS INTEGER 3", "1:21: Unexpected 3 in DIM statement"); + } + + #[test] + fn test_do_until_empty() { + do_ok_test( + "DO UNTIL TRUE\nLOOP", + &[Statement::Do(DoSpan { + guard: DoGuard::PreUntil(expr_boolean(true, 1, 10)), + body: vec![], + })], + ); + + do_ok_test( + "DO UNTIL FALSE\nREM foo\nLOOP", + &[Statement::Do(DoSpan { + guard: DoGuard::PreUntil(expr_boolean(false, 1, 10)), + body: vec![], + })], + ); + } + + #[test] + fn test_do_infinite_empty() { + do_ok_test("DO\nLOOP", &[Statement::Do(DoSpan { guard: DoGuard::Infinite, body: vec![] })]); + } + + #[test] + fn test_do_pre_until_loops() { + do_ok_test( + "DO UNTIL TRUE\nA\nB\nLOOP", + &[Statement::Do(DoSpan { + guard: DoGuard::PreUntil(expr_boolean(true, 1, 10)), + body: vec![make_bare_builtin_call("A", 2, 1), make_bare_builtin_call("B", 3, 1)], + })], + ); + } + + #[test] + fn test_do_pre_while_loops() { + do_ok_test( + "DO WHILE TRUE\nA\nB\nLOOP", + &[Statement::Do(DoSpan { + guard: DoGuard::PreWhile(expr_boolean(true, 1, 10)), + body: vec![make_bare_builtin_call("A", 2, 1), make_bare_builtin_call("B", 3, 1)], + })], + ); + } + + #[test] + fn test_do_post_until_loops() { + do_ok_test( + "DO\nA\nB\nLOOP UNTIL TRUE", + &[Statement::Do(DoSpan { + guard: DoGuard::PostUntil(expr_boolean(true, 4, 12)), + + body: vec![make_bare_builtin_call("A", 2, 1), make_bare_builtin_call("B", 3, 1)], + })], + ); + } + + #[test] + fn test_do_post_while_loops() { + do_ok_test( + "DO\nA\nB\nLOOP WHILE FALSE", + &[Statement::Do(DoSpan { + guard: DoGuard::PostWhile(expr_boolean(false, 4, 12)), + body: vec![make_bare_builtin_call("A", 2, 1), make_bare_builtin_call("B", 3, 1)], + })], + ); + } + + #[test] + fn test_do_nested() { + let code = r#" + DO WHILE TRUE + A + DO + B + LOOP UNTIL FALSE + C + LOOP + "#; + do_ok_test( + code, + &[Statement::Do(DoSpan { + guard: DoGuard::PreWhile(expr_boolean(true, 2, 22)), + body: vec![ + make_bare_builtin_call("A", 3, 17), + Statement::Do(DoSpan { + guard: DoGuard::PostUntil(expr_boolean(false, 6, 28)), + body: vec![make_bare_builtin_call("B", 5, 21)], + }), + make_bare_builtin_call("C", 7, 17), + ], + })], + ); + } + + #[test] + fn test_do_errors() { + do_error_test("DO\n", "1:1: DO without LOOP"); + do_error_test("DO FOR\n", "1:4: Expecting newline, UNTIL or WHILE after DO"); + + do_error_test("\n\nDO UNTIL TRUE\n", "3:1: DO without LOOP"); + do_error_test("\n\nDO WHILE TRUE\n", "3:1: DO without LOOP"); + do_error_test("DO UNTIL TRUE\nEND", "1:1: DO without LOOP"); + do_error_test("DO WHILE TRUE\nEND", "1:1: DO without LOOP"); + do_error_test("DO UNTIL TRUE\nEND\n", "1:1: DO without LOOP"); + do_error_test("DO WHILE TRUE\nEND\n", "1:1: DO without LOOP"); + do_error_test("DO UNTIL TRUE\nEND WHILE\n", "2:5: Unexpected keyword in expression"); + do_error_test("DO WHILE TRUE\nEND WHILE\n", "2:5: Unexpected keyword in expression"); + + do_error_test("DO UNTIL\n", "1:9: No expression in UNTIL clause"); + do_error_test("DO WHILE\n", "1:9: No expression in WHILE clause"); + do_error_test("DO UNTIL TRUE", "1:14: Expecting newline after DO"); + do_error_test("DO WHILE TRUE", "1:14: Expecting newline after DO"); + + do_error_test("DO\nLOOP UNTIL", "2:11: No expression in UNTIL clause"); + do_error_test("DO\nLOOP WHILE\n", "2:11: No expression in WHILE clause"); + + do_error_test("DO UNTIL ,\nLOOP", "1:10: No expression in UNTIL clause"); + do_error_test("DO WHILE ,\nLOOP", "1:10: No expression in WHILE clause"); + + do_error_test("DO\nLOOP UNTIL ,\n", "2:12: No expression in UNTIL clause"); + do_error_test("DO\nLOOP WHILE ,\n", "2:12: No expression in WHILE clause"); + + do_error_test( + "DO WHILE TRUE\nLOOP UNTIL FALSE", + "1:1: DO loop cannot have pre and post guards at the same time", + ); + } + + #[test] + fn test_exit_do() { + do_ok_test(" EXIT DO", &[Statement::ExitDo(ExitSpan { pos: lc(1, 3) })]); + } + + #[test] + fn test_exit_for() { + do_ok_test(" EXIT FOR", &[Statement::ExitFor(ExitSpan { pos: lc(1, 3) })]); + } + + #[test] + fn test_exit_function() { + do_ok_test(" EXIT FUNCTION", &[Statement::ExitFunction(ExitSpan { pos: lc(1, 3) })]); + } + + #[test] + fn test_exit_sub() { + do_ok_test(" EXIT SUB", &[Statement::ExitSub(ExitSpan { pos: lc(1, 3) })]); + } + + #[test] + fn test_exit_errors() { + do_error_test("EXIT", "1:5: Expecting DO, FOR, FUNCTION or SUB after EXIT"); + do_error_test("EXIT 5", "1:6: Expecting DO, FOR, FUNCTION or SUB after EXIT"); + } + + /// Wrapper around `do_ok_test` to parse an expression. Given that expressions alone are not + /// valid statements, we have to put them in a statement to parse them. In doing so, we can + /// also put an extra statement after them to ensure we detect their end properly. + fn do_expr_ok_test(input: &str, expr: Expr) { + do_ok_test( + &format!("PRINT {}, 1", input), + &[Statement::Call(CallSpan { + vref: VarRef::new("PRINT", None), + vref_pos: lc(1, 1), + args: vec![ + ArgSpan { + expr: Some(expr), + sep: ArgSep::Long, + sep_pos: lc(1, 7 + input.len()), + }, + ArgSpan { + expr: Some(expr_integer(1, 1, 6 + input.len() + 3)), + sep: ArgSep::End, + sep_pos: lc(1, 10 + input.len()), + }, + ], + })], + ); + } + + /// Wrapper around `do_error_test` to parse an expression. Given that expressions alone are not + /// valid statements, we have to put them in a statement to parse them. In doing so, we can + /// also put an extra statement after them to ensure we detect their end properly. + fn do_expr_error_test(input: &str, msg: &str) { + do_error_test(&format!("PRINT {}, 1", input), msg) + } + + #[test] + fn test_expr_literals() { + do_expr_ok_test("TRUE", expr_boolean(true, 1, 7)); + do_expr_ok_test("FALSE", expr_boolean(false, 1, 7)); + do_expr_ok_test("5", expr_integer(5, 1, 7)); + do_expr_ok_test("\"some text\"", expr_text("some text", 1, 7)); + } + + #[test] + fn test_expr_symbols() { + do_expr_ok_test("foo", expr_symbol(VarRef::new("foo", None), 1, 7)); + do_expr_ok_test("bar$", expr_symbol(VarRef::new("bar", Some(ExprType::Text)), 1, 7)); + } + + #[test] + fn test_expr_parens() { + use Expr::*; + do_expr_ok_test("(1)", expr_integer(1, 1, 8)); + do_expr_ok_test("((1))", expr_integer(1, 1, 9)); + do_expr_ok_test(" ( ( 1 ) ) ", expr_integer(1, 1, 12)); + do_expr_ok_test( + "3 * (2 + 5)", + Multiply(Box::from(BinaryOpSpan { + lhs: expr_integer(3, 1, 7), + rhs: Add(Box::from(BinaryOpSpan { + lhs: expr_integer(2, 1, 12), + rhs: expr_integer(5, 1, 16), + pos: lc(1, 14), + })), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "(7) - (1) + (-2)", + Add(Box::from(BinaryOpSpan { + lhs: Subtract(Box::from(BinaryOpSpan { + lhs: expr_integer(7, 1, 8), + rhs: expr_integer(1, 1, 14), + pos: lc(1, 11), + })), + rhs: Negate(Box::from(UnaryOpSpan { + expr: expr_integer(2, 1, 21), + pos: lc(1, 20), + })), + pos: lc(1, 17), + })), + ); + } + + #[test] + fn test_expr_arith_ops() { + use Expr::*; + let span = Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 11), + pos: lc(1, 9), + }); + do_expr_ok_test("1 + 2", Add(span.clone())); + do_expr_ok_test("1 - 2", Subtract(span.clone())); + do_expr_ok_test("1 * 2", Multiply(span.clone())); + do_expr_ok_test("1 / 2", Divide(span.clone())); + do_expr_ok_test("1 ^ 2", Power(span)); + let span = Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 13), + pos: lc(1, 9), + }); + do_expr_ok_test("1 MOD 2", Modulo(span)); + } + + #[test] + fn test_expr_rel_ops() { + use Expr::*; + let span1 = Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 11), + pos: lc(1, 9), + }); + let span2 = Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 12), + pos: lc(1, 9), + }); + do_expr_ok_test("1 = 2", Equal(span1.clone())); + do_expr_ok_test("1 <> 2", NotEqual(span2.clone())); + do_expr_ok_test("1 < 2", Less(span1.clone())); + do_expr_ok_test("1 <= 2", LessEqual(span2.clone())); + do_expr_ok_test("1 > 2", Greater(span1)); + do_expr_ok_test("1 >= 2", GreaterEqual(span2)); + } + + #[test] + fn test_expr_logical_ops() { + use Expr::*; + do_expr_ok_test( + "1 AND 2", + And(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 13), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "1 OR 2", + Or(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 12), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "1 XOR 2", + Xor(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 13), + pos: lc(1, 9), + })), + ); + } + + #[test] + fn test_expr_logical_ops_not() { + use Expr::*; + do_expr_ok_test( + "NOT TRUE", + Not(Box::from(UnaryOpSpan { expr: expr_boolean(true, 1, 11), pos: lc(1, 7) })), + ); + do_expr_ok_test( + "NOT 6", + Not(Box::from(UnaryOpSpan { expr: expr_integer(6, 1, 11), pos: lc(1, 7) })), + ); + do_expr_ok_test( + "NOT NOT TRUE", + Not(Box::from(UnaryOpSpan { + expr: Not(Box::from(UnaryOpSpan { + expr: expr_boolean(true, 1, 15), + pos: lc(1, 11), + })), + pos: lc(1, 7), + })), + ); + do_expr_ok_test( + "1 - NOT 4", + Subtract(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: Not(Box::from(UnaryOpSpan { expr: expr_integer(4, 1, 15), pos: lc(1, 11) })), + pos: lc(1, 9), + })), + ); + } + + #[test] + fn test_expr_bitwise_ops() { + use Expr::*; + do_expr_ok_test( + "1 << 2", + ShiftLeft(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 12), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "1 >> 2", + ShiftRight(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_integer(2, 1, 12), + pos: lc(1, 9), + })), + ); + } + + #[test] + fn test_expr_op_priorities() { + use Expr::*; + do_expr_ok_test( + "3 * (2 + 5) = (3 + 1 = 2 OR 1 = 3 XOR FALSE * \"a\")", + Equal(Box::from(BinaryOpSpan { + lhs: Multiply(Box::from(BinaryOpSpan { + lhs: expr_integer(3, 1, 7), + rhs: Add(Box::from(BinaryOpSpan { + lhs: expr_integer(2, 1, 12), + rhs: expr_integer(5, 1, 16), + pos: lc(1, 14), + })), + pos: lc(1, 9), + })), + rhs: Xor(Box::from(BinaryOpSpan { + lhs: Or(Box::from(BinaryOpSpan { + lhs: Equal(Box::from(BinaryOpSpan { + lhs: Add(Box::from(BinaryOpSpan { + lhs: expr_integer(3, 1, 22), + rhs: expr_integer(1, 1, 26), + pos: lc(1, 24), + })), + rhs: expr_integer(2, 1, 30), + pos: lc(1, 28), + })), + rhs: Equal(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 35), + rhs: expr_integer(3, 1, 39), + pos: lc(1, 37), + })), + pos: lc(1, 32), + })), + rhs: Multiply(Box::from(BinaryOpSpan { + lhs: expr_boolean(false, 1, 45), + rhs: expr_text("a", 1, 53), + pos: lc(1, 51), + })), + pos: lc(1, 41), + })), + pos: lc(1, 19), + })), + ); + do_expr_ok_test( + "-1 ^ 3", + Negate(Box::from(UnaryOpSpan { + expr: Power(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 8), + rhs: expr_integer(3, 1, 12), + pos: lc(1, 10), + })), + pos: lc(1, 7), + })), + ); + do_expr_ok_test( + "-(1 ^ 3)", + Negate(Box::from(UnaryOpSpan { + expr: Power(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 9), + rhs: expr_integer(3, 1, 13), + pos: lc(1, 11), + })), + pos: lc(1, 7), + })), + ); + do_expr_ok_test( + "(-1) ^ 3", + Power(Box::from(BinaryOpSpan { + lhs: Negate(Box::from(UnaryOpSpan { expr: expr_integer(1, 1, 9), pos: lc(1, 8) })), + rhs: expr_integer(3, 1, 14), + pos: lc(1, 12), + })), + ); + do_expr_ok_test( + "1 ^ (-3)", + Power(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: Negate(Box::from(UnaryOpSpan { + expr: expr_integer(3, 1, 13), + pos: lc(1, 12), + })), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "0 <> 2 >> 1", + NotEqual(Box::from(BinaryOpSpan { + lhs: expr_integer(0, 1, 7), + rhs: ShiftRight(Box::from(BinaryOpSpan { + lhs: expr_integer(2, 1, 12), + rhs: expr_integer(1, 1, 17), + pos: lc(1, 14), + })), + pos: lc(1, 9), + })), + ); + } + + #[test] + fn test_expr_numeric_signs() { + use Expr::*; + + do_expr_ok_test( + "-a", + Negate(Box::from(UnaryOpSpan { + expr: expr_symbol(VarRef::new("a", None), 1, 8), + pos: lc(1, 7), + })), + ); + + do_expr_ok_test( + "1 - -3", + Subtract(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: Negate(Box::from(UnaryOpSpan { + expr: expr_integer(3, 1, 12), + pos: lc(1, 11), + })), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "-1 - 3", + Subtract(Box::from(BinaryOpSpan { + lhs: Negate(Box::from(UnaryOpSpan { expr: expr_integer(1, 1, 8), pos: lc(1, 7) })), + rhs: expr_integer(3, 1, 12), + pos: lc(1, 10), + })), + ); + do_expr_ok_test( + "5 + -1", + Add(Box::from(BinaryOpSpan { + lhs: expr_integer(5, 1, 7), + rhs: Negate(Box::from(UnaryOpSpan { + expr: expr_integer(1, 1, 12), + pos: lc(1, 11), + })), + pos: lc(1, 9), + })), + ); + do_expr_ok_test( + "-5 + 1", + Add(Box::from(BinaryOpSpan { + lhs: Negate(Box::from(UnaryOpSpan { expr: expr_integer(5, 1, 8), pos: lc(1, 7) })), + rhs: expr_integer(1, 1, 12), + pos: lc(1, 10), + })), + ); + do_expr_ok_test( + "NOT -3", + Not(Box::from(UnaryOpSpan { + expr: Negate(Box::from(UnaryOpSpan { + expr: expr_integer(3, 1, 12), + pos: lc(1, 11), + })), + pos: lc(1, 7), + })), + ); + + do_expr_ok_test( + "1.0 - -3.5", + Subtract(Box::from(BinaryOpSpan { + lhs: expr_double(1.0, 1, 7), + rhs: Negate(Box::from(UnaryOpSpan { + expr: expr_double(3.5, 1, 14), + pos: lc(1, 13), + })), + pos: lc(1, 11), + })), + ); + do_expr_ok_test( + "5.12 + -0.50", + Add(Box::from(BinaryOpSpan { + lhs: expr_double(5.12, 1, 7), + rhs: Negate(Box::from(UnaryOpSpan { + expr: expr_double(0.50, 1, 15), + pos: lc(1, 14), + })), + pos: lc(1, 12), + })), + ); + do_expr_ok_test( + "NOT -3", + Not(Box::from(UnaryOpSpan { + expr: Negate(Box::from(UnaryOpSpan { + expr: expr_integer(3, 1, 12), + pos: lc(1, 11), + })), + pos: lc(1, 7), + })), + ); + } + + #[test] + fn test_expr_functions_variadic() { + use Expr::*; + do_expr_ok_test( + "zero()", + Call(CallSpan { vref: VarRef::new("zero", None), vref_pos: lc(1, 7), args: vec![] }), + ); + do_expr_ok_test( + "one%(1)", + Call(CallSpan { + vref: VarRef::new("one", Some(ExprType::Integer)), + vref_pos: lc(1, 7), + args: vec![ArgSpan { + expr: Some(expr_integer(1, 1, 12)), + sep: ArgSep::End, + sep_pos: lc(1, 13), + }], + }), + ); + do_expr_ok_test( + "many$(3, \"x\", TRUE)", + Call(CallSpan { + vref: VarRef::new("many", Some(ExprType::Text)), + vref_pos: lc(1, 7), + args: vec![ + ArgSpan { + expr: Some(expr_integer(3, 1, 13)), + sep: ArgSep::Long, + sep_pos: lc(1, 14), + }, + ArgSpan { + expr: Some(expr_text("x", 1, 16)), + sep: ArgSep::Long, + sep_pos: lc(1, 19), + }, + ArgSpan { + expr: Some(expr_boolean(true, 1, 21)), + sep: ArgSep::End, + sep_pos: lc(1, 25), + }, + ], + }), + ); + } + + #[test] + fn test_expr_functions_nested() { + use Expr::*; + do_expr_ok_test( + "consecutive(parenthesis())", + Call(CallSpan { + vref: VarRef::new("consecutive", None), + vref_pos: lc(1, 7), + args: vec![ArgSpan { + expr: Some(Call(CallSpan { + vref: VarRef::new("parenthesis", None), + vref_pos: lc(1, 19), + args: vec![], + })), + sep: ArgSep::End, + sep_pos: lc(1, 32), + }], + }), + ); + do_expr_ok_test( + "outer?(1, inner1(2, 3), 4, inner2(), 5)", + Call(CallSpan { + vref: VarRef::new("outer", Some(ExprType::Boolean)), + vref_pos: lc(1, 7), + args: vec![ + ArgSpan { + expr: Some(expr_integer(1, 1, 14)), + sep: ArgSep::Long, + sep_pos: lc(1, 15), + }, + ArgSpan { + expr: Some(Call(CallSpan { + vref: VarRef::new("inner1", None), + vref_pos: lc(1, 17), + args: vec![ + ArgSpan { + expr: Some(expr_integer(2, 1, 24)), + sep: ArgSep::Long, + sep_pos: lc(1, 25), + }, + ArgSpan { + expr: Some(expr_integer(3, 1, 27)), + sep: ArgSep::End, + sep_pos: lc(1, 28), + }, + ], + })), + sep: ArgSep::Long, + sep_pos: lc(1, 29), + }, + ArgSpan { + expr: Some(expr_integer(4, 1, 31)), + sep: ArgSep::Long, + sep_pos: lc(1, 32), + }, + ArgSpan { + expr: Some(Call(CallSpan { + vref: VarRef::new("inner2", None), + vref_pos: lc(1, 34), + args: vec![], + })), + sep: ArgSep::Long, + sep_pos: lc(1, 42), + }, + ArgSpan { + expr: Some(expr_integer(5, 1, 44)), + sep: ArgSep::End, + sep_pos: lc(1, 45), + }, + ], + }), + ); + } + + #[test] + fn test_expr_functions_and_ops() { + use Expr::*; + do_expr_ok_test( + "b AND ask?(34 + 15, ask(1, FALSE), -5)", + And(Box::from(BinaryOpSpan { + lhs: expr_symbol(VarRef::new("b".to_owned(), None), 1, 7), + rhs: Call(CallSpan { + vref: VarRef::new("ask", Some(ExprType::Boolean)), + vref_pos: lc(1, 13), + args: vec![ + ArgSpan { + expr: Some(Add(Box::from(BinaryOpSpan { + lhs: expr_integer(34, 1, 18), + rhs: expr_integer(15, 1, 23), + pos: lc(1, 21), + }))), + sep: ArgSep::Long, + sep_pos: lc(1, 25), + }, + ArgSpan { + expr: Some(Call(CallSpan { + vref: VarRef::new("ask", None), + vref_pos: lc(1, 27), + args: vec![ + ArgSpan { + expr: Some(expr_integer(1, 1, 31)), + sep: ArgSep::Long, + sep_pos: lc(1, 32), + }, + ArgSpan { + expr: Some(expr_boolean(false, 1, 34)), + sep: ArgSep::End, + sep_pos: lc(1, 39), + }, + ], + })), + sep: ArgSep::Long, + sep_pos: lc(1, 40), + }, + ArgSpan { + expr: Some(Negate(Box::from(UnaryOpSpan { + expr: expr_integer(5, 1, 43), + pos: lc(1, 42), + }))), + sep: ArgSep::End, + sep_pos: lc(1, 44), + }, + ], + }), + pos: lc(1, 9), + })), + ); + } + + #[test] + fn test_expr_functions_not_confused_with_symbols() { + use Expr::*; + let iref = VarRef::new("i", None); + let jref = VarRef::new("j", None); + do_expr_ok_test( + "i = 0 OR i = (j - 1)", + Or(Box::from(BinaryOpSpan { + lhs: Equal(Box::from(BinaryOpSpan { + lhs: expr_symbol(iref.clone(), 1, 7), + rhs: expr_integer(0, 1, 11), + pos: lc(1, 9), + })), + rhs: Equal(Box::from(BinaryOpSpan { + lhs: expr_symbol(iref, 1, 16), + rhs: Subtract(Box::from(BinaryOpSpan { + lhs: expr_symbol(jref, 1, 21), + rhs: expr_integer(1, 1, 25), + pos: lc(1, 23), + })), + pos: lc(1, 18), + })), + pos: lc(1, 13), + })), + ); + } + + #[test] + fn test_expr_errors() { + // Note that all column numbers in the errors below are offset by 6 (due to "PRINT ") as + // that's what the do_expr_error_test function is prefixing to the given strings. + + do_expr_error_test("+3", "1:7: Not enough values to apply operator"); + do_expr_error_test("2 + * 3", "1:9: Not enough values to apply operator"); + do_expr_error_test("(2(3))", "1:9: Unexpected ( in expression"); + do_expr_error_test("((3)2)", "1:11: Unexpected value in expression"); + do_expr_error_test("2 3", "1:9: Unexpected value in expression"); + + do_expr_error_test("(", "1:8: Missing expression"); + + do_expr_error_test(")", "1:7: Expected comma, semicolon, or end of statement"); + do_expr_error_test("(()", "1:10: Missing expression"); + do_expr_error_test("())", "1:7: Expected expression"); + do_expr_error_test("3 + (2 + 1) + (4 - 5", "1:21: Unbalanced parenthesis"); + do_expr_error_test( + "3 + 2 + 1) + (4 - 5)", + "1:16: Expected comma, semicolon, or end of statement", + ); + + do_expr_error_test("foo(,)", "1:11: Missing expression"); + do_expr_error_test("foo(, 3)", "1:11: Missing expression"); + do_expr_error_test("foo(3, )", "1:14: Missing expression"); + do_expr_error_test("foo(3, , 4)", "1:14: Missing expression"); + // TODO(jmmv): These are not the best error messages... + do_expr_error_test("(,)", "1:8: Missing expression"); + do_expr_error_test("(3, 4)", "1:7: Expected expression"); + do_expr_error_test("((), ())", "1:10: Missing expression"); + + // TODO(jmmv): This succeeds because `PRINT` is interned as a `Token::Symbol` so the + // expression parser sees it as a variable reference... but this should probably fail. + // Would need to intern builtin call names as a separate token to catch this, but that + // also means that the lexer must be aware of builtin call names upfront. + use Expr::*; + do_expr_ok_test( + "1 + PRINT", + Add(Box::from(BinaryOpSpan { + lhs: expr_integer(1, 1, 7), + rhs: expr_symbol(VarRef::new("PRINT", None), 1, 11), + pos: lc(1, 9), + })), + ); + } + + #[test] + fn test_expr_errors_due_to_keywords() { + for kw in &[ + "BOOLEAN", "CASE", "DATA", "DIM", "DOUBLE", "ELSEIF", "END", "ERROR", "EXIT", "FOR", + "GOSUB", "GOTO", "IF", "IS", "INTEGER", "LOOP", "NEXT", "ON", "RESUME", "RETURN", + "SELECT", "STRING", "UNTIL", "WEND", "WHILE", + ] { + do_expr_error_test( + &format!("2 + {} - 1", kw), + "1:11: Unexpected keyword in expression", + ); + } + } + + #[test] + fn test_if_empty_branches() { + do_ok_test( + "IF 1 THEN\nEND IF", + &[Statement::If(IfSpan { + branches: vec![IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }], + })], + ); + do_ok_test( + "IF 1 THEN\nREM Some comment to skip over\n\nEND IF", + &[Statement::If(IfSpan { + branches: vec![IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }], + })], + ); + do_ok_test( + "IF 1 THEN\nELSEIF 2 THEN\nEND IF", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { guard: expr_integer(2, 2, 8), body: vec![] }, + ], + })], + ); + do_ok_test( + "IF 1 THEN\nELSEIF 2 THEN\nELSE\nEND IF", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { guard: expr_integer(2, 2, 8), body: vec![] }, + IfBranchSpan { guard: expr_boolean(true, 3, 1), body: vec![] }, + ], + })], + ); + do_ok_test( + "IF 1 THEN\nELSE\nEND IF", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { guard: expr_boolean(true, 2, 1), body: vec![] }, + ], + })], + ); + } + + /// Helper to instantiate a trivial `Statement::BuiltinCall` that has no arguments. + fn make_bare_builtin_call(name: &str, line: usize, col: usize) -> Statement { + Statement::Call(CallSpan { + vref: VarRef::new(name, None), + vref_pos: LineCol { line, col }, + args: vec![], + }) + } + + #[test] + fn test_if_with_one_statement_or_empty_lines() { + do_ok_test( + "IF 1 THEN\nPRINT\nEND IF", + &[Statement::If(IfSpan { + branches: vec![IfBranchSpan { + guard: expr_integer(1, 1, 4), + body: vec![make_bare_builtin_call("PRINT", 2, 1)], + }], + })], + ); + do_ok_test( + "IF 1 THEN\nREM foo\nELSEIF 2 THEN\nPRINT\nEND IF", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { + guard: expr_integer(2, 3, 8), + body: vec![make_bare_builtin_call("PRINT", 4, 1)], + }, + ], + })], + ); + do_ok_test( + "IF 1 THEN\nELSEIF 2 THEN\nELSE\n\nPRINT\nEND IF", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { guard: expr_integer(2, 2, 8), body: vec![] }, + IfBranchSpan { + guard: expr_boolean(true, 3, 1), + body: vec![make_bare_builtin_call("PRINT", 5, 1)], + }, + ], + })], + ); + do_ok_test( + "IF 1 THEN\n\n\nELSE\nPRINT\nEND IF", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { + guard: expr_boolean(true, 4, 1), + body: vec![make_bare_builtin_call("PRINT", 5, 1)], + }, + ], + })], + ); + } + + #[test] + fn test_if_complex() { + let code = r#" + IF 1 THEN 'First branch + A + B + ELSEIF 2 THEN 'Second branch + C + D + ELSEIF 3 THEN 'Third branch + E + F + ELSE 'Last branch + G + H + END IF + "#; + do_ok_test( + code, + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { + guard: expr_integer(1, 2, 16), + body: vec![ + make_bare_builtin_call("A", 3, 17), + make_bare_builtin_call("B", 4, 17), + ], + }, + IfBranchSpan { + guard: expr_integer(2, 5, 20), + body: vec![ + make_bare_builtin_call("C", 6, 17), + make_bare_builtin_call("D", 7, 17), + ], + }, + IfBranchSpan { + guard: expr_integer(3, 8, 20), + body: vec![ + make_bare_builtin_call("E", 9, 17), + make_bare_builtin_call("F", 10, 17), + ], + }, + IfBranchSpan { + guard: expr_boolean(true, 11, 13), + body: vec![ + make_bare_builtin_call("G", 12, 17), + make_bare_builtin_call("H", 13, 17), + ], + }, + ], + })], + ); + } + + #[test] + fn test_if_with_interleaved_end_complex() { + let code = r#" + IF 1 THEN 'First branch + A + END + B + ELSEIF 2 THEN 'Second branch + C + END 8 + D + ELSEIF 3 THEN 'Third branch + E + END + F + ELSE 'Last branch + G + END 5 + H + END IF + "#; + do_ok_test( + code, + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { + guard: expr_integer(1, 2, 16), + body: vec![ + make_bare_builtin_call("A", 3, 17), + Statement::End(EndSpan { code: None, pos: lc(4, 17) }), + make_bare_builtin_call("B", 5, 17), + ], + }, + IfBranchSpan { + guard: expr_integer(2, 6, 20), + body: vec![ + make_bare_builtin_call("C", 7, 17), + Statement::End(EndSpan { + code: Some(Expr::Integer(IntegerSpan { value: 8, pos: lc(8, 21) })), + pos: lc(8, 17), + }), + make_bare_builtin_call("D", 9, 17), + ], + }, + IfBranchSpan { + guard: expr_integer(3, 10, 20), + body: vec![ + make_bare_builtin_call("E", 11, 17), + Statement::End(EndSpan { code: None, pos: lc(12, 17) }), + make_bare_builtin_call("F", 13, 17), + ], + }, + IfBranchSpan { + guard: expr_boolean(true, 14, 13), + body: vec![ + make_bare_builtin_call("G", 15, 17), + Statement::End(EndSpan { + code: Some(Expr::Integer(IntegerSpan { + value: 5, + pos: lc(16, 21), + })), + pos: lc(16, 17), + }), + make_bare_builtin_call("H", 17, 17), + ], + }, + ], + })], + ); + } + + #[test] + fn test_if_nested() { + let code = r#" + IF 1 THEN + A + ELSEIF 2 THEN + IF 3 THEN + B + END IF + END IF + "#; + do_ok_test( + code, + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { + guard: expr_integer(1, 2, 16), + body: vec![make_bare_builtin_call("A", 3, 17)], + }, + IfBranchSpan { + guard: expr_integer(2, 4, 20), + body: vec![Statement::If(IfSpan { + branches: vec![IfBranchSpan { + guard: expr_integer(3, 5, 20), + body: vec![make_bare_builtin_call("B", 6, 21)], + }], + })], + }, + ], + })], + ); + } + + #[test] + fn test_if_errors() { + do_error_test("IF\n", "1:3: No expression in IF statement"); + do_error_test("IF 3 + 1", "1:9: No THEN in IF statement"); + do_error_test("IF 3 + 1\n", "1:9: No THEN in IF statement"); + do_error_test("IF 3 + 1 PRINT foo\n", "1:10: Unexpected value in expression"); + do_error_test("IF 3 + 1\nPRINT foo\n", "1:9: No THEN in IF statement"); + do_error_test("IF 3 + 1 THEN", "1:1: IF without END IF"); + + do_error_test("IF 1 THEN\n", "1:1: IF without END IF"); + do_error_test("IF 1 THEN\nELSEIF 1 THEN\n", "1:1: IF without END IF"); + do_error_test("IF 1 THEN\nELSE\n", "1:1: IF without END IF"); + do_error_test("REM\n IF 1 THEN\n", "2:4: IF without END IF"); + + do_error_test("IF 1 THEN\nELSEIF\n", "2:7: No expression in ELSEIF statement"); + do_error_test("IF 1 THEN\nELSEIF 3 + 1", "2:13: No THEN in ELSEIF statement"); + do_error_test("IF 1 THEN\nELSEIF 3 + 1\n", "2:13: No THEN in ELSEIF statement"); + do_error_test( + "IF 1 THEN\nELSEIF 3 + 1 PRINT foo\n", + "2:14: Unexpected value in expression", + ); + do_error_test("IF 1 THEN\nELSEIF 3 + 1\nPRINT foo\n", "2:13: No THEN in ELSEIF statement"); + do_error_test("IF 1 THEN\nELSEIF 3 + 1 THEN", "2:18: Expecting newline after THEN"); + + do_error_test("IF 1 THEN\nELSE", "2:5: Expecting newline after ELSE"); + do_error_test("IF 1 THEN\nELSE foo", "2:6: Expecting newline after ELSE"); + + do_error_test("IF 1 THEN\nEND", "1:1: IF without END IF"); + do_error_test("IF 1 THEN\nEND\n", "1:1: IF without END IF"); + do_error_test("IF 1 THEN\nEND IF foo", "2:8: Expected newline but found foo"); + do_error_test("IF 1 THEN\nEND SELECT\n", "2:1: END SELECT without SELECT"); + do_error_test("IF 1 THEN\nEND SELECT\nEND IF\n", "2:1: END SELECT without SELECT"); + + do_error_test( + "IF 1 THEN\nELSE\nELSEIF 2 THEN\nEND IF", + "3:1: Unexpected ELSEIF after ELSE", + ); + do_error_test("IF 1 THEN\nELSE\nELSE\nEND IF", "3:1: Duplicate ELSE after ELSE"); + + do_error_test_no_reset("ELSEIF 1 THEN\nEND IF", "1:1: Unexpected ELSEIF in statement"); + do_error_test_no_reset("ELSE 1\nEND IF", "1:1: Unexpected ELSE in statement"); + + do_error_test("IF 1 THEN\nEND 3 IF", "2:7: Unexpected keyword in expression"); + do_error_test("END 3 IF", "1:7: Unexpected keyword in expression"); + do_error_test("END IF", "1:1: END IF without IF"); + + do_error_test("IF TRUE THEN PRINT ELSE ELSE", "1:25: Unexpected ELSE in uniline IF branch"); + } + + #[test] + fn test_if_uniline_then() { + do_ok_test( + "IF 1 THEN A", + &[Statement::If(IfSpan { + branches: vec![IfBranchSpan { + guard: expr_integer(1, 1, 4), + body: vec![make_bare_builtin_call("A", 1, 11)], + }], + })], + ); + } + + #[test] + fn test_if_uniline_then_else() { + do_ok_test( + "IF 1 THEN A ELSE B", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { + guard: expr_integer(1, 1, 4), + body: vec![make_bare_builtin_call("A", 1, 11)], + }, + IfBranchSpan { + guard: expr_boolean(true, 1, 13), + body: vec![make_bare_builtin_call("B", 1, 18)], + }, + ], + })], + ); + } + + #[test] + fn test_if_uniline_empty_then_else() { + do_ok_test( + "IF 1 THEN ELSE B", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { + guard: expr_boolean(true, 1, 11), + body: vec![make_bare_builtin_call("B", 1, 16)], + }, + ], + })], + ); + } + + #[test] + fn test_if_uniline_then_empty_else() { + do_ok_test( + "IF 1 THEN A ELSE", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { + guard: expr_integer(1, 1, 4), + body: vec![make_bare_builtin_call("A", 1, 11)], + }, + IfBranchSpan { guard: expr_boolean(true, 1, 13), body: vec![] }, + ], + })], + ); + } + + #[test] + fn test_if_uniline_empty_then_empty_else() { + do_ok_test( + "IF 1 THEN ELSE", + &[Statement::If(IfSpan { + branches: vec![ + IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![] }, + IfBranchSpan { guard: expr_boolean(true, 1, 11), body: vec![] }, + ], + })], + ); + } + + /// Performs a test of a uniline if statement followed by a specific allowed statement type. + /// + /// `text` is the literal statement to append to the if statement, and `stmt` contains the + /// expected parsed statement. The expected positions for the parsed statement are line 1 and + /// columns offset by 11 characters. + fn do_if_uniline_allowed_test(text: &str, stmt: Statement) { + do_ok_test( + &format!("IF 1 THEN {}\nZ", text), + &[ + Statement::If(IfSpan { + branches: vec![IfBranchSpan { guard: expr_integer(1, 1, 4), body: vec![stmt] }], + }), + make_bare_builtin_call("Z", 2, 1), + ], + ); + } + + #[test] + fn test_if_uniline_allowed_data() { + do_if_uniline_allowed_test("DATA", Statement::Data(DataSpan { values: vec![None] })); + } + + #[test] + fn test_if_uniline_allowed_end() { + do_if_uniline_allowed_test( + "END 8", + Statement::End(EndSpan { code: Some(expr_integer(8, 1, 15)), pos: lc(1, 11) }), + ); + } + + #[test] + fn test_if_uniline_allowed_exit() { + do_if_uniline_allowed_test("EXIT DO", Statement::ExitDo(ExitSpan { pos: lc(1, 11) })); + + do_error_test("IF 1 THEN EXIT", "1:15: Expecting DO, FOR, FUNCTION or SUB after EXIT"); + } + + #[test] + fn test_if_uniline_allowed_gosub() { + do_if_uniline_allowed_test( + "GOSUB 10", + Statement::Gosub(GotoSpan { target: "10".to_owned(), target_pos: lc(1, 17) }), + ); + + do_error_test("IF 1 THEN GOSUB", "1:16: Expected label name after GOSUB"); + } + + #[test] + fn test_if_uniline_allowed_goto() { + do_if_uniline_allowed_test( + "GOTO 10", + Statement::Goto(GotoSpan { target: "10".to_owned(), target_pos: lc(1, 16) }), + ); + + do_error_test("IF 1 THEN GOTO", "1:15: Expected label name after GOTO"); + } + + #[test] + fn test_if_uniline_allowed_on_error() { + do_if_uniline_allowed_test( + "ON ERROR RESUME NEXT", + Statement::OnError(OnErrorSpan::ResumeNext(lc(1, 11))), + ); + + do_error_test("IF 1 THEN ON", "1:13: Expected ERROR after ON"); + } + + #[test] + fn test_if_uniline_allowed_return() { + do_if_uniline_allowed_test("RETURN", Statement::Return(ReturnSpan { pos: lc(1, 11) })); + } + + #[test] + fn test_if_uniline_allowed_assignment() { + do_if_uniline_allowed_test( + "a = 3", + Statement::Assignment(AssignmentSpan { + vref: VarRef::new("a", None), + vref_pos: lc(1, 11), + expr: expr_integer(3, 1, 15), + }), + ); + } + + #[test] + fn test_if_uniline_allowed_array_assignment() { + do_if_uniline_allowed_test( + "a(3) = 5", + Statement::ArrayAssignment(ArrayAssignmentSpan { + vref: VarRef::new("a", None), + vref_pos: lc(1, 11), + subscripts: vec![expr_integer(3, 1, 13)], + expr: expr_integer(5, 1, 18), + }), + ); + } + + #[test] + fn test_if_uniline_allowed_builtin_call() { + do_if_uniline_allowed_test( + "a 0", + Statement::Call(CallSpan { + vref: VarRef::new("A", None), + vref_pos: lc(1, 11), + args: vec![ArgSpan { + expr: Some(expr_integer(0, 1, 13)), + sep: ArgSep::End, + sep_pos: lc(1, 14), + }], + }), + ); + } + + #[test] + fn test_if_uniline_unallowed_statements() { + for t in ["DIM", "DO", "IF", "FOR", "10", "@label", "SELECT", "WHILE"] { + do_error_test( + &format!("IF 1 THEN {}", t), + &format!("1:11: Unexpected {} in uniline IF branch", t), + ); + } + } + + #[test] + fn test_for_empty() { + let auto_iter = VarRef::new("i", None); + do_ok_test( + "FOR i = 1 TO 10\nNEXT", + &[Statement::For(ForSpan { + iter: auto_iter.clone(), + iter_pos: lc(1, 5), + iter_double: false, + start: expr_integer(1, 1, 9), + end: Expr::LessEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(auto_iter.clone(), 1, 5), + rhs: expr_integer(10, 1, 14), + pos: lc(1, 11), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(auto_iter, 1, 5), + rhs: expr_integer(1, 1, 16), + pos: lc(1, 11), + })), + body: vec![], + })], + ); + + let typed_iter = VarRef::new("d", Some(ExprType::Double)); + do_ok_test( + "FOR d# = 1.0 TO 10.2\nREM Nothing to do\nNEXT", + &[Statement::For(ForSpan { + iter: typed_iter.clone(), + iter_pos: lc(1, 5), + iter_double: false, + start: expr_double(1.0, 1, 10), + end: Expr::LessEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(typed_iter.clone(), 1, 5), + rhs: expr_double(10.2, 1, 17), + pos: lc(1, 14), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(typed_iter, 1, 5), + rhs: expr_integer(1, 1, 21), + pos: lc(1, 14), + })), + body: vec![], + })], + ); + } + + #[test] + fn test_for_incrementing() { + let iter = VarRef::new("i", None); + do_ok_test( + "FOR i = 0 TO 5\nA\nB\nNEXT", + &[Statement::For(ForSpan { + iter: iter.clone(), + iter_pos: lc(1, 5), + iter_double: false, + start: expr_integer(0, 1, 9), + end: Expr::LessEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter.clone(), 1, 5), + rhs: expr_integer(5, 1, 14), + pos: lc(1, 11), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter, 1, 5), + rhs: expr_integer(1, 1, 15), + pos: lc(1, 11), + })), + body: vec![make_bare_builtin_call("A", 2, 1), make_bare_builtin_call("B", 3, 1)], + })], + ); + } + + #[test] + fn test_for_incrementing_with_step() { + let iter = VarRef::new("i", None); + do_ok_test( + "FOR i = 0 TO 5 STEP 2\nA\nNEXT", + &[Statement::For(ForSpan { + iter: iter.clone(), + iter_pos: lc(1, 5), + iter_double: false, + start: expr_integer(0, 1, 9), + end: Expr::LessEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter.clone(), 1, 5), + rhs: expr_integer(5, 1, 14), + pos: lc(1, 11), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter, 1, 5), + rhs: expr_integer(2, 1, 21), + pos: lc(1, 11), + })), + body: vec![make_bare_builtin_call("A", 2, 1)], + })], + ); + + let iter = VarRef::new("i", None); + do_ok_test( + "FOR i = 0 TO 5 STEP 2.5\nA\nNEXT", + &[Statement::For(ForSpan { + iter: iter.clone(), + iter_pos: lc(1, 5), + iter_double: true, + start: expr_integer(0, 1, 9), + end: Expr::LessEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter.clone(), 1, 5), + rhs: expr_integer(5, 1, 14), + pos: lc(1, 11), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter, 1, 5), + rhs: expr_double(2.5, 1, 21), + pos: lc(1, 11), + })), + body: vec![make_bare_builtin_call("A", 2, 1)], + })], + ); + } + + #[test] + fn test_for_decrementing_with_step() { + let iter = VarRef::new("i", None); + do_ok_test( + "FOR i = 5 TO 0 STEP -1\nA\nNEXT", + &[Statement::For(ForSpan { + iter: iter.clone(), + iter_pos: lc(1, 5), + iter_double: false, + start: expr_integer(5, 1, 9), + end: Expr::GreaterEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter.clone(), 1, 5), + rhs: expr_integer(0, 1, 14), + pos: lc(1, 11), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter, 1, 5), + rhs: expr_integer(-1, 1, 22), + pos: lc(1, 11), + })), + body: vec![make_bare_builtin_call("A", 2, 1)], + })], + ); + + let iter = VarRef::new("i", None); + do_ok_test( + "FOR i = 5 TO 0 STEP -1.2\nA\nNEXT", + &[Statement::For(ForSpan { + iter: iter.clone(), + iter_pos: lc(1, 5), + iter_double: true, + start: expr_integer(5, 1, 9), + end: Expr::GreaterEqual(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter.clone(), 1, 5), + rhs: expr_integer(0, 1, 14), + pos: lc(1, 11), + })), + next: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_symbol(iter, 1, 5), + rhs: expr_double(-1.2, 1, 22), + pos: lc(1, 11), + })), + body: vec![make_bare_builtin_call("A", 2, 1)], + })], + ); + } + + #[test] + fn test_for_errors() { + do_error_test("FOR\n", "1:4: No iterator name in FOR statement"); + do_error_test("FOR =\n", "1:5: No iterator name in FOR statement"); + do_error_test( + "FOR a$\n", + "1:5: Iterator name in FOR statement must be a numeric reference", + ); + + do_error_test("FOR d#\n", "1:7: No equal sign in FOR statement"); + do_error_test("FOR i 3\n", "1:7: No equal sign in FOR statement"); + do_error_test("FOR i = TO\n", "1:9: No start expression in FOR statement"); + do_error_test("FOR i = NEXT\n", "1:9: Unexpected keyword in expression"); + + do_error_test("FOR i = 3 STEP\n", "1:11: No TO in FOR statement"); + do_error_test("FOR i = 3 TO STEP\n", "1:14: No end expression in FOR statement"); + do_error_test("FOR i = 3 TO NEXT\n", "1:14: Unexpected keyword in expression"); + + do_error_test("FOR i = 3 TO 1 STEP a\n", "1:21: STEP needs a literal number"); + do_error_test("FOR i = 3 TO 1 STEP -a\n", "1:22: STEP needs a literal number"); + do_error_test("FOR i = 3 TO 1 STEP NEXT\n", "1:21: STEP needs a literal number"); + do_error_test("FOR i = 3 TO 1 STEP 0\n", "1:21: Infinite FOR loop; STEP cannot be 0"); + do_error_test("FOR i = 3 TO 1 STEP 0.0\n", "1:21: Infinite FOR loop; STEP cannot be 0"); + + do_error_test("FOR i = 3 TO 1", "1:15: Expecting newline after FOR"); + do_error_test("FOR i = 1 TO 3 STEP 1", "1:22: Expecting newline after FOR"); + do_error_test("FOR i = 3 TO 1 STEP -1", "1:23: Expecting newline after FOR"); + + do_error_test(" FOR i = 0 TO 10\nPRINT i\n", "1:5: FOR without NEXT"); + } + + #[test] + fn test_function_empty() { + do_ok_test( + "FUNCTION foo$\nEND FUNCTION", + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 10), + params: vec![], + body: vec![], + end_pos: lc(2, 1), + })], + ); + } + + #[test] + fn test_function_some_content() { + do_ok_test( + r#" + FUNCTION foo$ + A + END + END 8 + B + END FUNCTION + "#, + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(2, 26), + params: vec![], + body: vec![ + make_bare_builtin_call("A", 3, 21), + Statement::End(EndSpan { code: None, pos: lc(4, 21) }), + Statement::End(EndSpan { + code: Some(Expr::Integer(IntegerSpan { value: 8, pos: lc(5, 25) })), + pos: lc(5, 21), + }), + make_bare_builtin_call("B", 6, 21), + ], + end_pos: lc(7, 17), + })], + ); + } + + #[test] + fn test_function_one_param() { + do_ok_test( + "FUNCTION foo$(x)\nEND FUNCTION", + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 10), + params: vec![VarRef::new("x", None)], + body: vec![], + end_pos: lc(2, 1), + })], + ); + } + + #[test] + fn test_function_multiple_params() { + do_ok_test( + "FUNCTION foo$(x$, y, z AS BOOLEAN)\nEND FUNCTION", + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", Some(ExprType::Text)), + name_pos: lc(1, 10), + params: vec![ + VarRef::new("x", Some(ExprType::Text)), + VarRef::new("y", None), + VarRef::new("z", Some(ExprType::Boolean)), + ], + body: vec![], + end_pos: lc(2, 1), + })], + ); + } + + #[test] + fn test_function_errors() { + do_error_test("FUNCTION", "1:9: Expected a name after FUNCTION"); + do_error_test("FUNCTION foo", "1:13: Expected newline after FUNCTION name"); + do_error_test("FUNCTION foo 3", "1:14: Expected newline after FUNCTION name"); + do_error_test("FUNCTION foo\nEND", "1:1: FUNCTION without END FUNCTION"); + do_error_test("FUNCTION foo\nEND IF", "2:1: END IF without IF"); + do_error_test("FUNCTION foo\nEND SUB", "2:1: END SUB without SUB"); + do_error_test( + "FUNCTION foo\nFUNCTION bar\nEND FUNCTION\nEND FUNCTION", + "2:1: Cannot nest FUNCTION or SUB definitions", + ); + do_error_test( + "FUNCTION foo\nSUB bar\nEND SUB\nEND FUNCTION", + "2:1: Cannot nest FUNCTION or SUB definitions", + ); + do_error_test("FUNCTION foo (", "1:15: Expected a parameter name"); + do_error_test("FUNCTION foo ()", "1:15: Expected a parameter name"); + do_error_test("FUNCTION foo (,)", "1:15: Expected a parameter name"); + do_error_test("FUNCTION foo (a,)", "1:17: Expected a parameter name"); + do_error_test("FUNCTION foo (,b)", "1:15: Expected a parameter name"); + do_error_test("FUNCTION foo (a AS)", "1:19: Invalid type name ) in AS type definition"); + do_error_test( + "FUNCTION foo (a INTEGER)", + "1:17: Expected comma, AS, or end of parameters list", + ); + do_error_test("FUNCTION foo (a? AS BOOLEAN)", "1:15: Type annotation not allowed in a?"); + } + + #[test] + fn test_gosub_ok() { + do_ok_test( + "GOSUB 10", + &[Statement::Gosub(GotoSpan { target: "10".to_owned(), target_pos: lc(1, 7) })], + ); + + do_ok_test( + "GOSUB @foo", + &[Statement::Gosub(GotoSpan { target: "foo".to_owned(), target_pos: lc(1, 7) })], + ); + } + + #[test] + fn test_gosub_errors() { + do_error_test("GOSUB\n", "1:6: Expected label name after GOSUB"); + do_error_test("GOSUB foo\n", "1:7: Expected label name after GOSUB"); + do_error_test("GOSUB \"foo\"\n", "1:7: Expected label name after GOSUB"); + do_error_test("GOSUB @foo, @bar\n", "1:11: Expected newline but found ,"); + do_error_test("GOSUB @foo, 3\n", "1:11: Expected newline but found ,"); + } + + #[test] + fn test_goto_ok() { + do_ok_test( + "GOTO 10", + &[Statement::Goto(GotoSpan { target: "10".to_owned(), target_pos: lc(1, 6) })], + ); + + do_ok_test( + "GOTO @foo", + &[Statement::Goto(GotoSpan { target: "foo".to_owned(), target_pos: lc(1, 6) })], + ); + } + + #[test] + fn test_goto_errors() { + do_error_test("GOTO\n", "1:5: Expected label name after GOTO"); + do_error_test("GOTO foo\n", "1:6: Expected label name after GOTO"); + do_error_test("GOTO \"foo\"\n", "1:6: Expected label name after GOTO"); + do_error_test("GOTO @foo, @bar\n", "1:10: Expected newline but found ,"); + do_error_test("GOTO @foo, 3\n", "1:10: Expected newline but found ,"); + } + + #[test] + fn test_label_own_line() { + do_ok_test( + "@foo\nPRINT", + &[ + Statement::Label(LabelSpan { name: "foo".to_owned(), name_pos: lc(1, 1) }), + make_bare_builtin_call("PRINT", 2, 1), + ], + ); + } + + #[test] + fn test_label_before_statement() { + do_ok_test( + "@foo PRINT", + &[ + Statement::Label(LabelSpan { name: "foo".to_owned(), name_pos: lc(1, 1) }), + make_bare_builtin_call("PRINT", 1, 6), + ], + ); + } + + #[test] + fn test_label_multiple_same_line() { + do_ok_test( + "@foo @bar", + &[ + Statement::Label(LabelSpan { name: "foo".to_owned(), name_pos: lc(1, 1) }), + Statement::Label(LabelSpan { name: "bar".to_owned(), name_pos: lc(1, 6) }), + ], + ); + } + + #[test] + fn test_label_errors() { + do_error_test("PRINT @foo", "1:7: Unexpected keyword in expression"); + } + + #[test] + fn test_parse_on_error_ok() { + do_ok_test("ON ERROR GOTO 0", &[Statement::OnError(OnErrorSpan::Reset(lc(1, 1)))]); + + do_ok_test( + "ON ERROR GOTO 10", + &[Statement::OnError(OnErrorSpan::Goto( + GotoSpan { target: "10".to_owned(), target_pos: lc(1, 15) }, + lc(1, 1), + ))], + ); + + do_ok_test( + "ON ERROR GOTO @foo", + &[Statement::OnError(OnErrorSpan::Goto( + GotoSpan { target: "foo".to_owned(), target_pos: lc(1, 15) }, + lc(1, 1), + ))], + ); + + do_ok_test( + "ON ERROR RESUME NEXT", + &[Statement::OnError(OnErrorSpan::ResumeNext(lc(1, 1)))], + ); + } + + #[test] + fn test_parse_on_error_errors() { + do_error_test("ON", "1:3: Expected ERROR after ON"); + do_error_test("ON NEXT", "1:4: Expected ERROR after ON"); + do_error_test("ON ERROR", "1:9: Expected GOTO or RESUME after ON ERROR"); + do_error_test("ON ERROR FOR", "1:10: Expected GOTO or RESUME after ON ERROR"); + + do_error_test("ON ERROR RESUME", "1:16: Expected NEXT after ON ERROR RESUME"); + do_error_test("ON ERROR RESUME 3", "1:17: Expected NEXT after ON ERROR RESUME"); + do_error_test("ON ERROR RESUME NEXT 3", "1:22: Expected newline but found 3"); + + do_error_test("ON ERROR GOTO", "1:14: Expected label name or 0 after ON ERROR GOTO"); + do_error_test("ON ERROR GOTO NEXT", "1:15: Expected label name or 0 after ON ERROR GOTO"); + do_error_test("ON ERROR GOTO 0 @a", "1:17: Expected newline but found @a"); + } + + #[test] + fn test_select_empty() { + do_ok_test( + "SELECT CASE 7\nEND SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![], + end_pos: lc(2, 1), + })], + ); + + do_ok_test( + "SELECT CASE 5 - TRUE\n \nEND SELECT", + &[Statement::Select(SelectSpan { + expr: Expr::Subtract(Box::from(BinaryOpSpan { + lhs: expr_integer(5, 1, 13), + rhs: expr_boolean(true, 1, 17), + pos: lc(1, 15), + })), + cases: vec![], + end_pos: lc(3, 1), + })], + ); + } + + #[test] + fn test_select_case_else_only() { + do_ok_test( + "SELECT CASE 7\nCASE ELSE\nA\nEND SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![CaseSpan { + guards: vec![], + body: vec![make_bare_builtin_call("A", 3, 1)], + }], + end_pos: lc(4, 1), + })], + ); + } + + #[test] + fn test_select_multiple_cases_without_else() { + do_ok_test( + "SELECT CASE 7\nCASE 1\nA\nCASE 2\nB\nEND SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![ + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(1, 2, 6))], + body: vec![make_bare_builtin_call("A", 3, 1)], + }, + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(2, 4, 6))], + body: vec![make_bare_builtin_call("B", 5, 1)], + }, + ], + end_pos: lc(6, 1), + })], + ); + } + + #[test] + fn test_select_multiple_cases_with_else() { + do_ok_test( + "SELECT CASE 7\nCASE 1\nA\nCASE 2\nB\nCASE ELSE\nC\nEND SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![ + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(1, 2, 6))], + body: vec![make_bare_builtin_call("A", 3, 1)], + }, + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(2, 4, 6))], + body: vec![make_bare_builtin_call("B", 5, 1)], + }, + CaseSpan { guards: vec![], body: vec![make_bare_builtin_call("C", 7, 1)] }, + ], + end_pos: lc(8, 1), + })], + ); + } + + #[test] + fn test_select_multiple_cases_empty_bodies() { + do_ok_test( + "SELECT CASE 7\nCASE 1\n\nCASE 2\n\nCASE ELSE\n\nEND SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![ + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(1, 2, 6))], + body: vec![], + }, + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(2, 4, 6))], + body: vec![], + }, + CaseSpan { guards: vec![], body: vec![] }, + ], + end_pos: lc(8, 1), + })], + ); + } + + #[test] + fn test_select_multiple_cases_with_interleaved_end() { + let code = r#" + SELECT CASE 7 + CASE 1 + A + END + B + CASE 2 ' Second case. + C + END 8 + D + CASE ELSE + E + END + F + END SELECT + "#; + do_ok_test( + code, + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 2, 25), + cases: vec![ + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(1, 3, 22))], + body: vec![ + make_bare_builtin_call("A", 4, 21), + Statement::End(EndSpan { code: None, pos: lc(5, 21) }), + make_bare_builtin_call("B", 6, 21), + ], + }, + CaseSpan { + guards: vec![CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(2, 7, 22))], + body: vec![ + make_bare_builtin_call("C", 8, 21), + Statement::End(EndSpan { + code: Some(Expr::Integer(IntegerSpan { value: 8, pos: lc(9, 25) })), + pos: lc(9, 21), + }), + make_bare_builtin_call("D", 10, 21), + ], + }, + CaseSpan { + guards: vec![], + body: vec![ + make_bare_builtin_call("E", 12, 21), + Statement::End(EndSpan { code: None, pos: lc(13, 21) }), + make_bare_builtin_call("F", 14, 21), + ], + }, + ], + end_pos: lc(15, 13), + })], + ); + } + + #[test] + fn test_select_case_guards_equals() { + do_ok_test( + "SELECT CASE 7: CASE 9, 10, FALSE: END SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![CaseSpan { + guards: vec![ + CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(9, 1, 21)), + CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(10, 1, 24)), + CaseGuardSpan::Is(CaseRelOp::Equal, expr_boolean(false, 1, 28)), + ], + body: vec![], + }], + end_pos: lc(1, 35), + })], + ); + } + + #[test] + fn test_select_case_guards_is() { + do_ok_test( + "SELECT CASE 7: CASE IS = 1, IS <> 2, IS < 3, IS <= 4, IS > 5, IS >= 6: END SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![CaseSpan { + guards: vec![ + CaseGuardSpan::Is(CaseRelOp::Equal, expr_integer(1, 1, 26)), + CaseGuardSpan::Is(CaseRelOp::NotEqual, expr_integer(2, 1, 35)), + CaseGuardSpan::Is(CaseRelOp::Less, expr_integer(3, 1, 43)), + CaseGuardSpan::Is(CaseRelOp::LessEqual, expr_integer(4, 1, 52)), + CaseGuardSpan::Is(CaseRelOp::Greater, expr_integer(5, 1, 60)), + CaseGuardSpan::Is(CaseRelOp::GreaterEqual, expr_integer(6, 1, 69)), + ], + body: vec![], + }], + end_pos: lc(1, 72), + })], + ); + } + + #[test] + fn test_select_case_guards_to() { + do_ok_test( + "SELECT CASE 7: CASE 1 TO 20, 10 TO 1: END SELECT", + &[Statement::Select(SelectSpan { + expr: expr_integer(7, 1, 13), + cases: vec![CaseSpan { + guards: vec![ + CaseGuardSpan::To(expr_integer(1, 1, 21), expr_integer(20, 1, 26)), + CaseGuardSpan::To(expr_integer(10, 1, 30), expr_integer(1, 1, 36)), + ], + body: vec![], + }], + end_pos: lc(1, 39), + })], + ); + } + + #[test] + fn test_select_errors() { + do_error_test("SELECT\n", "1:7: Expecting CASE after SELECT"); + do_error_test("SELECT CASE\n", "1:12: No expression in SELECT CASE statement"); + do_error_test("SELECT CASE 3 + 7", "1:18: Expecting newline after SELECT CASE"); + do_error_test("SELECT CASE 3 + 7 ,", "1:19: Expecting newline after SELECT CASE"); + do_error_test("SELECT CASE 3 + 7 IF", "1:19: Unexpected keyword in expression"); + + do_error_test("SELECT CASE 1\n", "1:1: SELECT without END SELECT"); + + do_error_test( + "SELECT CASE 1\nEND", + "2:1: Expected CASE after SELECT CASE before any statement", + ); + do_error_test( + "SELECT CASE 1\nEND IF", + "2:1: Expected CASE after SELECT CASE before any statement", + ); + do_error_test( + "SELECT CASE 1\na = 1", + "2:1: Expected CASE after SELECT CASE before any statement", + ); + + do_error_test( + "SELECT CASE 1\nCASE 1", + "2:7: Expected comma, newline, or TO after expression", + ); + do_error_test("SELECT CASE 1\nCASE ELSE", "2:10: Expecting newline after CASE"); + + do_error_test("SELECT CASE 1\nCASE ELSE\nEND", "1:1: SELECT without END SELECT"); + do_error_test("SELECT CASE 1\nCASE ELSE\nEND IF", "3:1: END IF without IF"); + + do_error_test("SELECT CASE 1\nCASE ELSE\nCASE ELSE\n", "3:1: CASE ELSE must be unique"); + do_error_test("SELECT CASE 1\nCASE ELSE\nCASE 1\n", "3:1: CASE ELSE is not last"); + } + + #[test] + fn test_select_case_errors() { + fn do_case_error_test(cases: &str, exp_error: &str) { + do_error_test(&format!("SELECT CASE 1\nCASE {}\n", cases), exp_error); + } + + do_case_error_test("ELSE, ELSE", "2:10: Expected newline after CASE ELSE"); + do_case_error_test("ELSE, 7", "2:10: Expected newline after CASE ELSE"); + do_case_error_test("7, ELSE", "2:9: CASE ELSE must be on its own"); + + do_case_error_test("IS 7", "2:9: Expected relational operator"); + do_case_error_test("IS AND", "2:9: Expected relational operator"); + do_case_error_test("IS END", "2:9: Expected relational operator"); + + do_case_error_test("IS <>", "2:11: Missing expression after relational operator"); + do_case_error_test("IS <> IF", "2:12: Unexpected keyword in expression"); + + do_case_error_test("", "2:6: Missing expression in CASE guard"); + do_case_error_test("2 + 5 TO", "2:14: Missing expression after TO in CASE guard"); + do_case_error_test("2 + 5 TO AS", "2:15: Missing expression after TO in CASE guard"); + do_case_error_test( + "2 + 5 TO 8 AS", + "2:17: Expected comma, newline, or TO after expression", + ); + } + + #[test] + fn test_sub_empty() { + do_ok_test( + "SUB foo\nEND SUB", + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", None), + name_pos: lc(1, 5), + params: vec![], + body: vec![], + end_pos: lc(2, 1), + })], + ); + } + + #[test] + fn test_sub_some_content() { + do_ok_test( + r#" + SUB foo + A + END + END 8 + B + END SUB + "#, + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", None), + name_pos: lc(2, 21), + params: vec![], + body: vec![ + make_bare_builtin_call("A", 3, 21), + Statement::End(EndSpan { code: None, pos: lc(4, 21) }), + Statement::End(EndSpan { + code: Some(Expr::Integer(IntegerSpan { value: 8, pos: lc(5, 25) })), + pos: lc(5, 21), + }), + make_bare_builtin_call("B", 6, 21), + ], + end_pos: lc(7, 17), + })], + ); + } + + #[test] + fn test_sub_one_param() { + do_ok_test( + "SUB foo(x)\nEND SUB", + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", None), + name_pos: lc(1, 5), + params: vec![VarRef::new("x", None)], + body: vec![], + end_pos: lc(2, 1), + })], + ); + } + + #[test] + fn test_sub_multiple_params() { + do_ok_test( + "SUB foo(x$, y, z AS BOOLEAN)\nEND SUB", + &[Statement::Callable(CallableSpan { + name: VarRef::new("foo", None), + name_pos: lc(1, 5), + params: vec![ + VarRef::new("x", Some(ExprType::Text)), + VarRef::new("y", None), + VarRef::new("z", Some(ExprType::Boolean)), + ], + body: vec![], + end_pos: lc(2, 1), + })], + ); + } + + #[test] + fn test_sub_errors() { + do_error_test("SUB", "1:4: Expected a name after SUB"); + do_error_test("SUB foo", "1:8: Expected newline after SUB name"); + do_error_test("SUB foo 3", "1:9: Expected newline after SUB name"); + do_error_test("SUB foo\nEND", "1:1: SUB without END SUB"); + do_error_test("SUB foo\nEND IF", "2:1: END IF without IF"); + do_error_test("SUB foo\nEND FUNCTION", "2:1: END FUNCTION without FUNCTION"); + do_error_test( + "SUB foo\nSUB bar\nEND SUB\nEND SUB", + "2:1: Cannot nest FUNCTION or SUB definitions", + ); + do_error_test( + "SUB foo\nFUNCTION bar\nEND FUNCTION\nEND SUB", + "2:1: Cannot nest FUNCTION or SUB definitions", + ); + do_error_test("SUB foo (", "1:10: Expected a parameter name"); + do_error_test("SUB foo ()", "1:10: Expected a parameter name"); + do_error_test("SUB foo (,)", "1:10: Expected a parameter name"); + do_error_test("SUB foo (a,)", "1:12: Expected a parameter name"); + do_error_test("SUB foo (,b)", "1:10: Expected a parameter name"); + do_error_test("SUB foo (a AS)", "1:14: Invalid type name ) in AS type definition"); + do_error_test("SUB foo (a INTEGER)", "1:12: Expected comma, AS, or end of parameters list"); + do_error_test("SUB foo (a? AS BOOLEAN)", "1:10: Type annotation not allowed in a?"); + do_error_test( + "SUB foo$", + "1:5: SUBs cannot return a value so type annotations are not allowed", + ); + do_error_test( + "SUB foo$\nEND SUB", + "1:5: SUBs cannot return a value so type annotations are not allowed", + ); + } + + #[test] + fn test_while_empty() { + do_ok_test( + "WHILE 2 + 3\nWEND", + &[Statement::While(WhileSpan { + expr: Expr::Add(Box::from(BinaryOpSpan { + lhs: expr_integer(2, 1, 7), + rhs: expr_integer(3, 1, 11), + pos: lc(1, 9), + })), + body: vec![], + })], + ); + do_ok_test( + "WHILE 5\n\nREM foo\n\nWEND\n", + &[Statement::While(WhileSpan { expr: expr_integer(5, 1, 7), body: vec![] })], + ); + } + + #[test] + fn test_while_loops() { + do_ok_test( + "WHILE TRUE\nA\nB\nWEND", + &[Statement::While(WhileSpan { + expr: expr_boolean(true, 1, 7), + body: vec![make_bare_builtin_call("A", 2, 1), make_bare_builtin_call("B", 3, 1)], + })], + ); + } + + #[test] + fn test_while_nested() { + let code = r#" + WHILE TRUE + A + WHILE FALSE + B + WEND + C + WEND + "#; + do_ok_test( + code, + &[Statement::While(WhileSpan { + expr: expr_boolean(true, 2, 19), + body: vec![ + make_bare_builtin_call("A", 3, 17), + Statement::While(WhileSpan { + expr: expr_boolean(false, 4, 23), + body: vec![make_bare_builtin_call("B", 5, 21)], + }), + make_bare_builtin_call("C", 7, 17), + ], + })], + ); + } + + #[test] + fn test_while_errors() { + do_error_test("WHILE\n", "1:6: No expression in WHILE statement"); + do_error_test("WHILE TRUE", "1:11: Expecting newline after WHILE"); + do_error_test("\n\nWHILE TRUE\n", "3:1: WHILE without WEND"); + do_error_test("WHILE TRUE\nEND", "1:1: WHILE without WEND"); + do_error_test("WHILE TRUE\nEND\n", "1:1: WHILE without WEND"); + do_error_test("WHILE TRUE\nEND WHILE\n", "2:5: Unexpected keyword in expression"); + + do_error_test("WHILE ,\nWEND", "1:7: No expression in WHILE statement"); + do_error_test("WHILE ,\nEND", "1:7: No expression in WHILE statement"); + } +} diff --git a/core2/src/reader.rs b/core2/src/reader.rs new file mode 100644 index 00000000..27b6a856 --- /dev/null +++ b/core2/src/reader.rs @@ -0,0 +1,319 @@ +// EndBASIC +// Copyright 2020 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Character-based reader for an input stream with position tracking. + +use std::char; +use std::fmt; +use std::io::{self, BufRead}; + +/// Tab length used to compute the current position within a line when encountering a tab character. +const TAB_LENGTH: usize = 8; + +/// A position within a source stream, represented as line and column numbers. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct LineCol { + /// Line number, starting from 1. + pub line: usize, + + /// Column number, starting from 1. + pub col: usize, +} + +impl fmt::Display for LineCol { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{}:{}", self.line, self.col) + } +} + +/// A character along with its position in the source stream. +#[derive(Debug)] +#[cfg_attr(test, derive(Eq, PartialEq))] +pub struct CharSpan { + /// The character value. + pub(crate) ch: char, + + /// The position where this character appears in the source. + pub(crate) pos: LineCol, +} + +/// State of buffered data in the character reader. +enum Pending { + /// Initial state where no data has been buffered yet. + Unknown, + + /// Holds a buffered line of characters and the index of the next character to return. + Chars(Vec, usize), + + /// Terminal state indicating end-of-file has been reached. + Eof, + + /// Terminal state indicating an I/O error occurred. Contains the original error if not yet + /// consumed, or `None` if the error was already returned to the caller. + Error(Option), +} + +/// Wraps an `io::Read` to provide an iterator over characters with position tracking. +pub struct CharReader<'a> { + /// The buffered reader wrapping the input stream. + reader: io::BufReader<&'a mut dyn io::Read>, + + /// Current state of buffered character data. + pending: Pending, + + /// If set, contains the result of a peek operation to be returned by the next `next()` call. + peeked: Option>>, + + /// Position of the next character to be read. + next_pos: LineCol, +} + +impl<'a> CharReader<'a> { + /// Constructs a new character reader from an `io::Read`. + pub fn from(reader: &'a mut dyn io::Read) -> Self { + Self { + reader: io::BufReader::new(reader), + pending: Pending::Unknown, + peeked: None, + next_pos: LineCol { line: 1, col: 1 }, + } + } + + /// Replenishes `pending` with the next line to process. + fn refill_and_next(&mut self) -> Option> { + self.pending = { + let mut line = String::new(); + match self.reader.read_line(&mut line) { + Ok(0) => Pending::Eof, + Ok(_) => Pending::Chars(line.chars().collect(), 0), + Err(e) => Pending::Error(Some(e)), + } + }; + self.next() + } + + /// Peeks into the next character without consuming it. + pub(crate) fn peek(&mut self) -> Option<&io::Result> { + if self.peeked.is_none() { + let next = self.next(); + self.peeked.replace(next); + } + self.peeked.as_ref().unwrap().as_ref() + } + + /// Gets the current position of the read, which is the position that the next character will + /// carry. + pub(crate) fn next_pos(&self) -> LineCol { + self.next_pos + } +} + +impl Iterator for CharReader<'_> { + type Item = io::Result; + + /// Returns the next character in the input stream. + fn next(&mut self) -> Option { + if let Some(peeked) = self.peeked.take() { + return peeked; + } + + match &mut self.pending { + Pending::Unknown => self.refill_and_next(), + Pending::Eof => None, + Pending::Chars(chars, last) => { + if *last == chars.len() { + self.refill_and_next() + } else { + let ch = chars[*last]; + *last += 1; + + let pos = self.next_pos; + match ch { + '\n' => { + self.next_pos.line += 1; + self.next_pos.col = 1; + } + '\t' => { + self.next_pos.col = + (self.next_pos.col - 1 + TAB_LENGTH) / TAB_LENGTH * TAB_LENGTH + 1; + } + _ => { + self.next_pos.col += 1; + } + } + + Some(Ok(CharSpan { ch, pos })) + } + } + Pending::Error(e) => match e.take() { + Some(e) => Some(Err(e)), + None => Some(Err(io::Error::other("Invalid state; error already consumed"))), + }, + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + /// Syntactic sugar to instantiate a `CharSpan` for testing. + fn cs(ch: char, line: usize, col: usize) -> CharSpan { + CharSpan { ch, pos: LineCol { line, col } } + } + + #[test] + fn test_empty() { + let mut input = b"".as_ref(); + let mut reader = CharReader::from(&mut input); + assert!(reader.next().is_none()); + } + + #[test] + fn test_multibyte_chars() { + let mut input = "Hi 훌리오".as_bytes(); + let mut reader = CharReader::from(&mut input); + assert_eq!(cs('H', 1, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('i', 1, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs(' ', 1, 3), reader.next().unwrap().unwrap()); + assert_eq!(cs('훌', 1, 4), reader.next().unwrap().unwrap()); + assert_eq!(cs('리', 1, 5), reader.next().unwrap().unwrap()); + assert_eq!(cs('오', 1, 6), reader.next().unwrap().unwrap()); + assert!(reader.next().is_none()); + } + + #[test] + fn test_consecutive_newlines() { + let mut input = b"a\n\nbc\n".as_ref(); + let mut reader = CharReader::from(&mut input); + assert_eq!(cs('a', 1, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 1, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 2, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('b', 3, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('c', 3, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 3, 3), reader.next().unwrap().unwrap()); + assert!(reader.next().is_none()); + } + + #[test] + fn test_tabs() { + let mut input = "1\t9\n1234567\t8\n12345678\t9".as_bytes(); + let mut reader = CharReader::from(&mut input); + assert_eq!(cs('1', 1, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('\t', 1, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('9', 1, 9), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 1, 10), reader.next().unwrap().unwrap()); + assert_eq!(cs('1', 2, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('2', 2, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('3', 2, 3), reader.next().unwrap().unwrap()); + assert_eq!(cs('4', 2, 4), reader.next().unwrap().unwrap()); + assert_eq!(cs('5', 2, 5), reader.next().unwrap().unwrap()); + assert_eq!(cs('6', 2, 6), reader.next().unwrap().unwrap()); + assert_eq!(cs('7', 2, 7), reader.next().unwrap().unwrap()); + assert_eq!(cs('\t', 2, 8), reader.next().unwrap().unwrap()); + assert_eq!(cs('8', 2, 9), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 2, 10), reader.next().unwrap().unwrap()); + assert_eq!(cs('1', 3, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('2', 3, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('3', 3, 3), reader.next().unwrap().unwrap()); + assert_eq!(cs('4', 3, 4), reader.next().unwrap().unwrap()); + assert_eq!(cs('5', 3, 5), reader.next().unwrap().unwrap()); + assert_eq!(cs('6', 3, 6), reader.next().unwrap().unwrap()); + assert_eq!(cs('7', 3, 7), reader.next().unwrap().unwrap()); + assert_eq!(cs('8', 3, 8), reader.next().unwrap().unwrap()); + assert_eq!(cs('\t', 3, 9), reader.next().unwrap().unwrap()); + assert_eq!(cs('9', 3, 17), reader.next().unwrap().unwrap()); + assert!(reader.next().is_none()); + } + + #[test] + fn test_crlf() { + let mut input = b"a\r\nb".as_ref(); + let mut reader = CharReader::from(&mut input); + assert_eq!(cs('a', 1, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('\r', 1, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 1, 3), reader.next().unwrap().unwrap()); + assert_eq!(cs('b', 2, 1), reader.next().unwrap().unwrap()); + assert!(reader.next().is_none()); + } + + #[test] + fn test_past_eof_returns_eof() { + let mut input = b"a".as_ref(); + let mut reader = CharReader::from(&mut input); + assert_eq!(cs('a', 1, 1), reader.next().unwrap().unwrap()); + assert!(reader.next().is_none()); + assert!(reader.next().is_none()); + } + + #[test] + fn test_next_pos() { + let mut input = "Hi".as_bytes(); + let mut reader = CharReader::from(&mut input); + assert_eq!(LineCol { line: 1, col: 1 }, reader.next_pos()); + assert_eq!(cs('H', 1, 1), reader.next().unwrap().unwrap()); + assert_eq!(LineCol { line: 1, col: 2 }, reader.next_pos()); + assert_eq!(cs('i', 1, 2), reader.next().unwrap().unwrap()); + assert_eq!(LineCol { line: 1, col: 3 }, reader.next_pos()); + assert!(reader.next().is_none()); + assert_eq!(LineCol { line: 1, col: 3 }, reader.next_pos()); + } + + /// A reader that generates an error only on the Nth read operation. + /// + /// All other reads return a line with a single character in them with the assumption that the + /// `CharReader` issues a single read per line. If that assumption changes, the tests here may + /// start failing. + struct FaultyReader { + current_read: usize, + fail_at_read: usize, + } + + impl FaultyReader { + /// Creates a new reader that will fail at the `fail_at_read`th operation. + fn new(fail_at_read: usize) -> Self { + let current_read = 0; + FaultyReader { current_read, fail_at_read } + } + } + + impl io::Read for FaultyReader { + #[allow(clippy::branches_sharing_code)] + fn read(&mut self, buf: &mut [u8]) -> io::Result { + if self.current_read == self.fail_at_read { + self.current_read += 1; + Err(io::Error::from(io::ErrorKind::InvalidInput)) + } else { + self.current_read += 1; + buf[0] = b'1'; + buf[1] = b'\n'; + Ok(2) + } + } + } + + #[test] + fn test_errors_prevent_further_reads() { + let mut reader = FaultyReader::new(2); + let mut reader = CharReader::from(&mut reader); + assert_eq!(cs('1', 1, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 1, 2), reader.next().unwrap().unwrap()); + assert_eq!(cs('1', 2, 1), reader.next().unwrap().unwrap()); + assert_eq!(cs('\n', 2, 2), reader.next().unwrap().unwrap()); + assert_eq!(io::ErrorKind::InvalidInput, reader.next().unwrap().unwrap_err().kind()); + assert_eq!(io::ErrorKind::Other, reader.next().unwrap().unwrap_err().kind()); + assert_eq!(io::ErrorKind::Other, reader.next().unwrap().unwrap_err().kind()); + } +} diff --git a/core2/src/testutils.rs b/core2/src/testutils.rs new file mode 100644 index 00000000..f908a32d --- /dev/null +++ b/core2/src/testutils.rs @@ -0,0 +1,112 @@ +// EndBASIC +// Copyright 2021 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Test utilities. + +use crate::ast::{ArgSep, ExprType}; +use crate::bytecode::VarArgTag; +use crate::callable::{ + ArgSepSyntax, CallResult, Callable, CallableMetadata, CallableMetadataBuilder, RepeatedSyntax, + RepeatedTypeSyntax, Scope, +}; +use async_trait::async_trait; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// Simplified version of `PRINT` that captures all calls to it into `data`. +/// +/// This command only accepts arguments separated by the `;` short separator and concatenates +/// them with a single space. +pub struct OutCommand { + /// Metadata describing the command's name and syntax. + metadata: Rc, + + /// Shared storage for captured output strings. + data: Rc>>, +} + +impl OutCommand { + /// Creates a new command that captures all calls into `data`. + pub fn new(data: Rc>>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT") + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::AnyValue, + sep: ArgSepSyntax::Exactly(ArgSep::Short), + require_one: false, + allow_missing: false, + }), + )]) + .test_build(), + data, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut first = true; + let mut text = String::new(); + let mut reg = 0; + loop { + if !first { + text += " "; + } + first = false; + + let sep = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + reg += 1; + match etype { + ExprType::Boolean => text.push_str(&format!("{}", scope.get_boolean(reg))), + ExprType::Double => text.push_str(&format!("{}", scope.get_double(reg))), + ExprType::Integer => text.push_str(&format!("{}", scope.get_integer(reg))), + ExprType::Text => text.push_str(scope.get_string(reg)), + } + sep + } + VarArgTag::Missing(sep) => { + text.push_str(""); + sep + } + VarArgTag::Pointer(sep) => { + reg += 1; + let typed_ptr = scope.get_ref(reg); + text.push_str(&typed_ptr.to_string()); + sep + } + }; + reg += 1; + + if sep == ArgSep::End { + break; + } + text.push(' '); + text.push_str(&sep.to_string()); + text.push(' '); + } + self.data.borrow_mut().push(text); + Ok(()) + } +} diff --git a/core2/src/vm/context.rs b/core2/src/vm/context.rs new file mode 100644 index 00000000..223c49b5 --- /dev/null +++ b/core2/src/vm/context.rs @@ -0,0 +1,1030 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Virtual processor for EndBASIC execution. + +use crate::ExprType; +use crate::Scope; +use crate::bytecode::{ + self, ErrorHandlerMode, ExitCode, Opcode, Register, TaggedRegisterRef, opcode_of, +}; +use crate::image::Image; +use crate::mem::{ArrayData, ConstantDatum, DatumPtr, HeapDatum}; +use crate::num::unchecked_usize_as_u8; +use crate::reader::LineCol; + +/// Alias for the type representing a program address. +type Address = usize; + +/// Internal representation of a `StopReason` that requires further annotation by the caller. +pub(super) enum InternalStopReason { + /// Execution terminated due to an `END` instruction. + End(ExitCode), + + /// Execution terminated due to natural fallthrough. + Eof, + + /// Execution stopped due to an instruction-level exception. + Exception(Address, String), + + /// Execution stopped due to an upcall that requires service from the caller. + /// + /// The fields are: upcall index, first argument register, and the PC of the UPCALL instruction. + Upcall(u16, Register, Address), +} + +/// Error handler configuration set by `ON ERROR`. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub(super) enum ErrorHandler { + /// Errors are not handled. + None, + + /// Errors resume execution at the next statement. + ResumeNext, + + /// Errors jump to a handler address. + Jump(Address), +} + +/// Represents a call frame in the stack. +struct Frame { + /// Program counter of the instruction that caused the call. + old_pc: Address, + + /// Frame pointer of the previous frame. + old_fp: usize, + + /// Register to store the return value of the call, if any. + ret_reg: Option, +} + +/// Custom implementation of checked integer additions for error reporting purposes. +#[inline(always)] +fn checked_add_integer(lhs: i32, rhs: i32) -> Result { + lhs.checked_add(rhs).ok_or("Integer overflow") +} + +/// Custom implementation of checked bitwise AND for error reporting purposes. +#[inline(always)] +fn checked_and_integer(lhs: i32, rhs: i32) -> Result { + Ok(lhs & rhs) +} + +/// Custom implementation of checked integer divisions for error reporting purposes. +#[inline(always)] +fn checked_div_integer(lhs: i32, rhs: i32) -> Result { + if rhs == 0 { Err("Division by zero") } else { lhs.checked_div(rhs).ok_or("Integer underflow") } +} + +/// Custom implementation of checked integer modulos for error reporting purposes. +#[inline(always)] +fn checked_mod_integer(lhs: i32, rhs: i32) -> Result { + if rhs == 0 { Err("Modulo by zero") } else { lhs.checked_rem(rhs).ok_or("Integer underflow") } +} + +/// Custom implementation of checked integer multiplications for error reporting purposes. +#[inline(always)] +fn checked_mul_integer(lhs: i32, rhs: i32) -> Result { + lhs.checked_mul(rhs).ok_or("Integer overflow") +} + +/// Custom implementation of checked bitwise OR for error reporting purposes. +#[inline(always)] +fn checked_or_integer(lhs: i32, rhs: i32) -> Result { + Ok(lhs | rhs) +} + +/// Custom implementation of checked integer powers for error reporting purposes. +#[inline(always)] +fn checked_pow_integer(lhs: i32, exp: u32) -> Result { + lhs.checked_pow(exp).ok_or("Integer overflow") +} + +/// Custom implementation of checked left shift for error reporting purposes. +#[inline(always)] +fn checked_shl_integer(lhs: i32, rhs: i32) -> Result { + match u32::try_from(rhs) { + Err(_) => Err(format!("Number of bits to << ({}) must be positive", rhs)), + Ok(bits) => Ok(lhs.checked_shl(bits).unwrap_or(0)), + } +} + +/// Custom implementation of checked right shift for error reporting purposes. +#[inline(always)] +fn checked_shr_integer(lhs: i32, rhs: i32) -> Result { + match u32::try_from(rhs) { + Err(_) => Err(format!("Number of bits to >> ({}) must be positive", rhs)), + Ok(bits) => Ok(match lhs.checked_shr(bits) { + Some(i) => i, + None if lhs < 0 => -1, + None => 0, + }), + } +} +/// Custom implementation of checked integer subtractions for error reporting purposes. +#[inline(always)] +fn checked_sub_integer(lhs: i32, rhs: i32) -> Result { + lhs.checked_sub(rhs).ok_or("Integer underflow") +} + +/// Custom implementation of checked bitwise XOR for error reporting purposes. +#[inline(always)] +fn checked_xor_integer(lhs: i32, rhs: i32) -> Result { + Ok(lhs ^ rhs) +} + +/// Execution context for the virtual machine. +/// +/// This roughly corresponds to the concept of a "processor", making the VM the container of +/// various objects and the context the representation of the execution. +pub(super) struct Context { + /// Program counter. + pc: Address, + + /// Frame pointer. Contains the offset of the first local register for the current + /// scope. + fp: usize, + + /// Stop signal. If set, indicates why the execution stopped during instruction processing. + stop: Option, + + /// Current error handler configuration. + err_handler: ErrorHandler, + + /// Register values. The first N registers hold global variables. After those, we find + /// the registers for all local variables and for all scopes. + regs: Vec, + + /// Stack of call frames for tracking subroutine and function calls. + call_stack: Vec, +} + +impl Default for Context { + fn default() -> Self { + Self { + pc: 0, + fp: usize::from(Register::MAX_GLOBAL), + stop: None, + err_handler: ErrorHandler::None, + regs: vec![0; usize::from(Register::MAX)], + call_stack: vec![], + } + } +} + +impl Context { + /// Gets the value of register `reg`. + /// + /// Panics if the register is invalid. + fn get_reg(&self, reg: Register) -> u64 { + let (is_global, index) = reg.to_parts(); + let mut index = usize::from(index); + if !is_global { + index += self.fp; + } + self.regs[index] + } + + /// Sets the value of register `reg` to `value`. + /// + /// Panics if the register is invalid. + fn set_reg(&mut self, reg: Register, value: u64) { + let (is_global, index) = reg.to_parts(); + let mut index = usize::from(index); + if !is_global { + index += self.fp; + } + self.regs[index] = value; + } + + /// Sets the program counter to `pc`. + pub(super) fn set_pc(&mut self, pc: Address) { + self.pc = pc; + } + + /// Returns the current error handler configuration. + pub(super) fn error_handler(&self) -> ErrorHandler { + self.err_handler + } + + /// Dereferences a pointer register as a string. + fn deref_string<'b>( + &self, + reg: Register, + constants: &'b [ConstantDatum], + heap: &'b [HeapDatum], + ) -> &'b str { + let raw_addr = self.get_reg(reg); + DatumPtr::from(raw_addr).resolve_string(constants, heap) + } + + /// Returns the raw `u64` value stored in global register `index`. + /// + /// Used by the VM's `get_global_*` methods to read global variable values after execution. + pub(super) fn get_global_reg_raw(&self, index: u8) -> u64 { + self.regs[usize::from(index)] + } + + /// Resolves array subscripts and computes the flat index for `arr_reg` with subscripts read + /// from registers starting at `first_sub_reg`. + /// + /// Returns `Some((heap_idx, flat_idx))` on success, or `None` if an exception was set. + fn resolve_array_index( + &mut self, + arr_reg: Register, + first_sub_reg: Register, + heap: &[HeapDatum], + ) -> Option<(usize, usize)> { + let arr_ptr = DatumPtr::from(self.get_reg(arr_reg)); + let heap_idx = arr_ptr.heap_index(); + let array = match &heap[heap_idx] { + HeapDatum::Array(a) => a, + _ => unreachable!("Register must point to an array"), + }; + + let ndims = array.dimensions.len(); + let (_, first_idx) = first_sub_reg.to_parts(); + let mut subscripts = Vec::with_capacity(ndims); + for i in 0..unchecked_usize_as_u8(ndims) { + let sub_reg = Register::local(first_idx + i).unwrap(); + subscripts.push(self.get_reg(sub_reg) as i32); + } + + match array.flat_index(&subscripts) { + Ok(flat_idx) => Some((heap_idx, flat_idx)), + Err(e) => { + self.set_exception(e); + None + } + } + } + + /// Registers that the instruction being processed threw an exception `message`. + /// + /// It's the responsibility of the execution loop to check for the presence of exceptions and + /// to stop execution if needed. + fn set_exception>(&mut self, message: S) { + self.stop = Some(InternalStopReason::Exception(self.pc, message.into())); + } + + /// Constructs a `Scope` for an upcall with arguments starting at `reg`. + pub(super) fn upcall_scope<'a>( + &'a mut self, + reg: Register, + constants: &'a [ConstantDatum], + heap: &'a mut Vec, + arg_linecols: &'a [LineCol], + last_error: &'a Option, + data: &'a [Option], + ) -> Scope<'a> { + let (is_global, index) = reg.to_parts(); + assert!(!is_global); + let index = usize::from(index); + + Scope { + regs: &mut self.regs, + constants, + heap, + fp: self.fp + index, + arg_linecols, + last_error, + data, + } + } + + /// Starts or resumes execution of `image`. + /// + /// Panics if the processor state is out of sync with `image` or if the contents of `image` + /// are invalid. We assume that the image comes from the result of an in-process compilation + /// (not stored bytecode) and that the compiler guarantees that the image is valid. + pub(super) fn exec(&mut self, image: &Image, heap: &mut Vec) -> InternalStopReason { + while self.stop.is_none() { + let instr = image.code[self.pc]; + + match opcode_of(instr) { + Opcode::AddDouble => self.do_add_double(instr), + Opcode::AddInteger => self.do_add_integer(instr), + Opcode::Alloc => self.do_alloc(instr, heap), + Opcode::AllocArray => self.do_alloc_array(instr, heap), + Opcode::BitwiseAnd => self.do_bitwise_and(instr), + Opcode::BitwiseNot => self.do_bitwise_not(instr), + Opcode::BitwiseOr => self.do_bitwise_or(instr), + Opcode::BitwiseXor => self.do_bitwise_xor(instr), + Opcode::Call => self.do_call(instr), + Opcode::Concat => self.do_concat(instr, &image.constants, heap), + Opcode::DivideDouble => self.do_divide_double(instr), + Opcode::DivideInteger => self.do_divide_integer(instr), + Opcode::DoubleToInteger => self.do_double_to_integer(instr), + Opcode::EqualBoolean => self.do_equal_boolean(instr), + Opcode::EqualDouble => self.do_equal_double(instr), + Opcode::EqualInteger => self.do_equal_integer(instr), + Opcode::EqualText => self.do_equal_text(instr, &image.constants, heap), + Opcode::End => self.do_end(instr), + Opcode::Eof => self.do_eof(instr), + Opcode::Gosub => self.do_gosub(instr), + Opcode::GreaterDouble => self.do_greater_double(instr), + Opcode::GreaterEqualDouble => self.do_greater_equal_double(instr), + Opcode::GreaterEqualInteger => self.do_greater_equal_integer(instr), + Opcode::GreaterEqualText => { + self.do_greater_equal_text(instr, &image.constants, heap) + } + Opcode::GreaterInteger => self.do_greater_integer(instr), + Opcode::GreaterText => self.do_greater_text(instr, &image.constants, heap), + Opcode::IntegerToDouble => self.do_integer_to_double(instr), + Opcode::Jump => self.do_jump(instr), + Opcode::JumpIfFalse => self.do_jump_if_false(instr), + Opcode::LessDouble => self.do_less_double(instr), + Opcode::LessEqualDouble => self.do_less_equal_double(instr), + Opcode::LessEqualInteger => self.do_less_equal_integer(instr), + Opcode::LessEqualText => self.do_less_equal_text(instr, &image.constants, heap), + Opcode::LessInteger => self.do_less_integer(instr), + Opcode::LessText => self.do_less_text(instr, &image.constants, heap), + Opcode::LoadArray => self.do_load_array(instr, heap), + Opcode::LoadConstant => self.do_load_constant(instr, &image.constants), + Opcode::LoadInteger => self.do_load_integer(instr), + Opcode::LoadRegisterPointer => self.do_load_register_ptr(instr), + Opcode::ModuloDouble => self.do_modulo_double(instr), + Opcode::ModuloInteger => self.do_modulo_integer(instr), + Opcode::Move => self.do_move(instr), + Opcode::MultiplyDouble => self.do_multiply_double(instr), + Opcode::MultiplyInteger => self.do_multiply_integer(instr), + Opcode::NegateDouble => self.do_negate_double(instr), + Opcode::NegateInteger => self.do_negate_integer(instr), + Opcode::NotEqualBoolean => self.do_not_equal_boolean(instr), + Opcode::NotEqualDouble => self.do_not_equal_double(instr), + Opcode::NotEqualInteger => self.do_not_equal_integer(instr), + Opcode::NotEqualText => self.do_not_equal_text(instr, &image.constants, heap), + Opcode::Nop => self.do_nop(instr), + Opcode::PowerDouble => self.do_power_double(instr), + Opcode::PowerInteger => self.do_power_integer(instr), + Opcode::Return => self.do_return(instr), + Opcode::SetErrorHandler => self.do_set_error_handler(instr), + Opcode::ShiftLeft => self.do_shift_left(instr), + Opcode::ShiftRight => self.do_shift_right(instr), + Opcode::StoreArray => self.do_store_array(instr, heap), + Opcode::SubtractDouble => self.do_subtract_double(instr), + Opcode::SubtractInteger => self.do_subtract_integer(instr), + Opcode::Upcall => self.do_upcall(instr), + } + } + self.stop.take().expect("The loop above can only exit when there is a stop reason") + } +} + +impl Context { + /// Applies a binary double operation using `parse` to decode the instruction and `op` to + /// compute the result. + fn do_binary_double_op( + &mut self, + instr: u32, + parse: fn(u32) -> (Register, Register, Register), + op: F, + ) where + F: Fn(f64, f64) -> f64, + { + let (dest, src1, src2) = parse(instr); + let lhs = f64::from_bits(self.get_reg(src1)); + let rhs = f64::from_bits(self.get_reg(src2)); + self.set_reg(dest, op(lhs, rhs).to_bits()); + self.pc += 1; + } + + /// Applies a binary double predicate using `parse` to decode the instruction and `op` to + /// compute the result. + fn do_binary_double_predicate_op( + &mut self, + instr: u32, + parse: fn(u32) -> (Register, Register, Register), + op: F, + ) where + F: Fn(f64, f64) -> bool, + { + let (dest, src1, src2) = parse(instr); + let lhs = f64::from_bits(self.get_reg(src1)); + let rhs = f64::from_bits(self.get_reg(src2)); + self.set_reg(dest, if op(lhs, rhs) { 1 } else { 0 }); + self.pc += 1; + } + + /// Applies a binary integer operation using `parse` to decode the instruction and `op` to + /// compute the result. `op` returns `Err` with a message on failure. + fn do_binary_integer_op( + &mut self, + instr: u32, + parse: fn(u32) -> (Register, Register, Register), + op: F, + ) where + F: Fn(i32, i32) -> Result, + E: ToString, + { + let (dest, src1, src2) = parse(instr); + let lhs = self.get_reg(src1) as i32; + let rhs = self.get_reg(src2) as i32; + match op(lhs, rhs) { + Ok(result) => { + self.set_reg(dest, result as u64); + self.pc += 1; + } + Err(msg) => { + self.set_exception(msg.to_string()); + } + } + } + + /// Applies a binary integer predicate using `parse` to decode the instruction and `op` to + /// compute the result. + fn do_binary_integer_predicate_op( + &mut self, + instr: u32, + parse: fn(u32) -> (Register, Register, Register), + op: F, + ) where + F: Fn(i32, i32) -> bool, + { + let (dest, src1, src2) = parse(instr); + let lhs = self.get_reg(src1) as i32; + let rhs = self.get_reg(src2) as i32; + self.set_reg(dest, if op(lhs, rhs) { 1 } else { 0 }); + self.pc += 1; + } + + /// Applies a binary boolean operation using `parse` to decode the instruction and `op` to + /// compute the result. + fn do_binary_boolean_op( + &mut self, + instr: u32, + parse: fn(u32) -> (Register, Register, Register), + op: F, + ) where + F: Fn(bool, bool) -> bool, + { + let (dest, src1, src2) = parse(instr); + let lhs = self.get_reg(src1) != 0; + let rhs = self.get_reg(src2) != 0; + self.set_reg(dest, if op(lhs, rhs) { 1 } else { 0 }); + self.pc += 1; + } + + /// Applies a binary text operation using `parse` to decode the instruction and `op` to + /// compute the result. + fn do_binary_text_op( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + parse: fn(u32) -> (Register, Register, Register), + op: F, + ) where + F: Fn(&str, &str) -> bool, + { + let (dest, src1, src2) = parse(instr); + let lhs = self.deref_string(src1, constants, heap); + let rhs = self.deref_string(src2, constants, heap); + self.set_reg(dest, if op(lhs, rhs) { 1 } else { 0 }); + self.pc += 1; + } + + /// Implements the `AddDouble` opcode. + pub(super) fn do_add_double(&mut self, instr: u32) { + self.do_binary_double_op(instr, bytecode::parse_add_double, |l, r| l + r); + } + + /// Implements the `AddInteger` opcode. + pub(super) fn do_add_integer(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_add_integer, checked_add_integer); + } + + /// Implements the `Alloc` opcode. + pub(super) fn do_alloc(&mut self, instr: u32, heap: &mut Vec) { + let (dest, etype) = bytecode::parse_alloc(instr); + debug_assert_eq!(ExprType::Text, etype, "Alloc is only emitted for strings right now"); + heap.push(HeapDatum::Text(String::new())); + let ptr = DatumPtr::for_heap((heap.len() - 1) as u32); + self.set_reg(dest, ptr); + self.pc += 1; + } + + /// Implements the `AllocArray` opcode. + pub(super) fn do_alloc_array(&mut self, instr: u32, heap: &mut Vec) { + let (dest, packed, first_dim_reg) = bytecode::parse_alloc_array(instr); + let subtype = packed.subtype(); + let ndims = usize::from(packed.ndims()); + + let (_, first_idx) = first_dim_reg.to_parts(); + let mut dimensions = Vec::with_capacity(ndims); + let mut total: usize = 1; + for i in 0..ndims { + let dim_reg = Register::local(first_idx + i as u8).unwrap(); + let dim = match usize::try_from(self.get_reg(dim_reg) as i32) { + Ok(0) | Err(_) => { + self.set_exception(format!("Dimension {} must be positive", i)); + return; + } + Ok(n) => n, + }; + dimensions.push(dim); + total *= dim; + } + + let values = match subtype { + ExprType::Boolean | ExprType::Double | ExprType::Integer => { + vec![0; total] + } + ExprType::Text => { + let mut values = Vec::with_capacity(total); + for _ in 0..total { + heap.push(HeapDatum::Text(String::new())); + values.push(DatumPtr::for_heap((heap.len() - 1) as u32)); + } + values + } + }; + let array = ArrayData { dimensions, values }; + heap.push(HeapDatum::Array(array)); + let ptr = DatumPtr::for_heap((heap.len() - 1) as u32); + self.set_reg(dest, ptr); + self.pc += 1; + } + + /// Implements the `BitwiseAnd` opcode. + pub(super) fn do_bitwise_and(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_bitwise_and, checked_and_integer); + } + + /// Implements the `BitwiseNot` opcode. + pub(super) fn do_bitwise_not(&mut self, instr: u32) { + let reg = bytecode::parse_bitwise_not(instr); + let value = self.get_reg(reg) as i32; + self.set_reg(reg, (!value) as u64); + self.pc += 1; + } + + /// Implements the `BitwiseOr` opcode. + pub(super) fn do_bitwise_or(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_bitwise_or, checked_or_integer); + } + + /// Implements the `BitwiseXor` opcode. + pub(super) fn do_bitwise_xor(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_bitwise_xor, checked_xor_integer); + } + + /// Implements the `Call` opcode. + pub(super) fn do_call(&mut self, instr: u32) { + let (reg, offset) = bytecode::parse_call(instr); + self.call_stack.push(Frame { old_pc: self.pc, old_fp: self.fp, ret_reg: Some(reg) }); + self.pc = Address::from(offset); + let (is_global, index) = reg.to_parts(); + debug_assert!(!is_global, "Function results are always stored to a temp register"); + self.fp += usize::from(index); + } + + /// Implements the `Concat` opcode. + pub(super) fn do_concat( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &mut Vec, + ) { + let (dest, src1, src2) = bytecode::parse_concat(instr); + let lhs = self.deref_string(src1, constants, heap).to_owned(); + let rhs = self.deref_string(src2, constants, heap); + let result = lhs + rhs; + heap.push(HeapDatum::Text(result)); + let ptr = DatumPtr::for_heap((heap.len() - 1) as u32); + self.set_reg(dest, ptr); + self.pc += 1; + } + + /// Implements the `DivideDouble` opcode. + pub(super) fn do_divide_double(&mut self, instr: u32) { + self.do_binary_double_op(instr, bytecode::parse_divide_double, |l, r| l / r); + } + + /// Implements the `DivideInteger` opcode. + pub(super) fn do_divide_integer(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_divide_integer, checked_div_integer); + } + + /// Implements the `DoubleToInteger` opcode. + pub(super) fn do_double_to_integer(&mut self, instr: u32) { + let reg = bytecode::parse_double_to_integer(instr); + let dvalue = f64::from_bits(self.get_reg(reg)); + self.set_reg(reg, dvalue.round() as u64); + self.pc += 1; + } + + /// Implements the `EqualBoolean` opcode. + pub(super) fn do_equal_boolean(&mut self, instr: u32) { + self.do_binary_boolean_op(instr, bytecode::parse_equal_boolean, |l, r| l == r); + } + + /// Implements the `EqualDouble` opcode. + pub(super) fn do_equal_double(&mut self, instr: u32) { + self.do_binary_double_predicate_op(instr, bytecode::parse_equal_double, |l, r| l == r); + } + + /// Implements the `EqualInteger` opcode. + pub(super) fn do_equal_integer(&mut self, instr: u32) { + self.do_binary_integer_predicate_op(instr, bytecode::parse_equal_integer, |l, r| l == r); + } + + /// Implements the `EqualText` opcode. + pub(super) fn do_equal_text( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + ) { + self.do_binary_text_op(instr, constants, heap, bytecode::parse_equal_text, |l, r| l == r); + } + + /// Implements the `End` opcode. + pub(super) fn do_end(&mut self, instr: u32) { + let reg = bytecode::parse_end(instr); + let code = self.get_reg(reg) as i32; + let code = match ExitCode::try_from(code) { + Ok(code) => code, + Err(e) => { + self.set_exception(e.to_string()); + return; + } + }; + self.stop = Some(InternalStopReason::End(code)); + } + + /// Implements the `Eof` opcode. + pub(super) fn do_eof(&mut self, instr: u32) { + bytecode::parse_eof(instr); + self.stop = Some(InternalStopReason::Eof); + } + + /// Implements the `Gosub` opcode. + pub(super) fn do_gosub(&mut self, instr: u32) { + let offset = bytecode::parse_gosub(instr); + self.call_stack.push(Frame { old_pc: self.pc, old_fp: self.fp, ret_reg: None }); + self.pc = Address::from(offset); + } + + /// Implements the `GreaterDouble` opcode. + pub(super) fn do_greater_double(&mut self, instr: u32) { + self.do_binary_double_predicate_op(instr, bytecode::parse_greater_double, |l, r| l > r); + } + + /// Implements the `GreaterEqualDouble` opcode. + pub(super) fn do_greater_equal_double(&mut self, instr: u32) { + self.do_binary_double_predicate_op(instr, bytecode::parse_greater_equal_double, |l, r| { + l >= r + }); + } + + /// Implements the `GreaterEqualInteger` opcode. + pub(super) fn do_greater_equal_integer(&mut self, instr: u32) { + self.do_binary_integer_predicate_op( + instr, + bytecode::parse_greater_equal_integer, + |l, r| l >= r, + ); + } + + /// Implements the `GreaterEqualText` opcode. + pub(super) fn do_greater_equal_text( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + ) { + self.do_binary_text_op( + instr, + constants, + heap, + bytecode::parse_greater_equal_text, + |l, r| l >= r, + ); + } + + /// Implements the `GreaterInteger` opcode. + pub(super) fn do_greater_integer(&mut self, instr: u32) { + self.do_binary_integer_predicate_op(instr, bytecode::parse_greater_integer, |l, r| l > r); + } + + /// Implements the `GreaterText` opcode. + pub(super) fn do_greater_text( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + ) { + self.do_binary_text_op(instr, constants, heap, bytecode::parse_greater_text, |l, r| l > r); + } + + /// Implements the `IntegerToDouble` opcode. + pub(super) fn do_integer_to_double(&mut self, instr: u32) { + let reg = bytecode::parse_integer_to_double(instr); + let ivalue = self.get_reg(reg) as i32; + self.set_reg(reg, (ivalue as f64).to_bits()); + self.pc += 1; + } + + /// Implements the `Jump` opcode. + pub(super) fn do_jump(&mut self, instr: u32) { + let offset = bytecode::parse_jump(instr); + self.pc = Address::from(offset); + } + + /// Implements the `JumpIfFalse` opcode. + pub(super) fn do_jump_if_false(&mut self, instr: u32) { + let (cond_reg, target) = bytecode::parse_jump_if_false(instr); + if self.get_reg(cond_reg) != 0 { + self.pc += 1; + } else { + self.pc = Address::from(target); + } + } + + /// Implements the `LessDouble` opcode. + pub(super) fn do_less_double(&mut self, instr: u32) { + self.do_binary_double_predicate_op(instr, bytecode::parse_less_double, |l, r| l < r); + } + + /// Implements the `LessEqualDouble` opcode. + pub(super) fn do_less_equal_double(&mut self, instr: u32) { + self.do_binary_double_predicate_op(instr, bytecode::parse_less_equal_double, |l, r| l <= r); + } + + /// Implements the `LessEqualInteger` opcode. + pub(super) fn do_less_equal_integer(&mut self, instr: u32) { + self.do_binary_integer_predicate_op(instr, bytecode::parse_less_equal_integer, |l, r| { + l <= r + }); + } + + /// Implements the `LessEqualText` opcode. + pub(super) fn do_less_equal_text( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + ) { + self.do_binary_text_op(instr, constants, heap, bytecode::parse_less_equal_text, |l, r| { + l <= r + }); + } + + /// Implements the `LessInteger` opcode. + pub(super) fn do_less_integer(&mut self, instr: u32) { + self.do_binary_integer_predicate_op(instr, bytecode::parse_less_integer, |l, r| l < r); + } + + /// Implements the `LessText` opcode. + pub(super) fn do_less_text( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + ) { + self.do_binary_text_op(instr, constants, heap, bytecode::parse_less_text, |l, r| l < r); + } + + /// Implements the `LoadArray` opcode. + pub(super) fn do_load_array(&mut self, instr: u32, heap: &[HeapDatum]) { + let (dest, arr_reg, first_sub_reg) = bytecode::parse_load_array(instr); + + if let Some((heap_idx, flat_idx)) = self.resolve_array_index(arr_reg, first_sub_reg, heap) { + let array = match &heap[heap_idx] { + HeapDatum::Array(a) => a, + _ => unreachable!("Register must point to an array"), + }; + self.set_reg(dest, array.values[flat_idx]); + self.pc += 1; + } + } + + /// Implements the `LoadConstant` opcode. + pub(super) fn do_load_constant(&mut self, instr: u32, constants: &[ConstantDatum]) { + let (register, i) = bytecode::parse_load_constant(instr); + match &constants[usize::from(i)] { + ConstantDatum::Boolean(_) => unreachable!("Booleans are always immediates"), + ConstantDatum::Double(d) => self.set_reg(register, d.to_bits()), + ConstantDatum::Integer(i) => self.set_reg(register, *i as u64), + ConstantDatum::Text(_) => unreachable!("Strings cannot be loaded into registers"), + } + self.pc += 1; + } + + /// Implements the `LoadInteger` opcode. + pub(super) fn do_load_integer(&mut self, instr: u32) { + let (register, i) = bytecode::parse_load_integer(instr); + self.set_reg(register, i as u64); + self.pc += 1; + } + + /// Implements the `LoadRegisterPointer` opcode. + pub(super) fn do_load_register_ptr(&mut self, instr: u32) { + let (dest, vtype, src) = bytecode::parse_load_register_ptr(instr); + let tagged_ref = TaggedRegisterRef::new(src, self.fp, vtype); + self.set_reg(dest, tagged_ref.as_u64()); + self.pc += 1; + } + + /// Implements the `ModuloDouble` opcode. + pub(super) fn do_modulo_double(&mut self, instr: u32) { + self.do_binary_double_op(instr, bytecode::parse_modulo_double, |l, r| l % r); + } + + /// Implements the `ModuloInteger` opcode. + pub(super) fn do_modulo_integer(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_modulo_integer, checked_mod_integer); + } + + /// Implements the `Move` opcode. + pub(super) fn do_move(&mut self, instr: u32) { + let (dest, src) = bytecode::parse_move(instr); + let value = self.get_reg(src); + self.set_reg(dest, value); + self.pc += 1; + } + + /// Implements the `MultiplyDouble` opcode. + pub(super) fn do_multiply_double(&mut self, instr: u32) { + self.do_binary_double_op(instr, bytecode::parse_multiply_double, |l, r| l * r); + } + + /// Implements the `MultiplyInteger` opcode. + pub(super) fn do_multiply_integer(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_multiply_integer, checked_mul_integer); + } + + /// Implements the `NegateDouble` opcode. + pub(super) fn do_negate_double(&mut self, instr: u32) { + let reg = bytecode::parse_negate_double(instr); + let value = f64::from_bits(self.get_reg(reg)); + self.set_reg(reg, (-value).to_bits()); + self.pc += 1; + } + + /// Implements the `NegateInteger` opcode. + pub(super) fn do_negate_integer(&mut self, instr: u32) { + let reg = bytecode::parse_negate_integer(instr); + let value = self.get_reg(reg) as i32; + match value.checked_neg() { + Some(result) => { + self.set_reg(reg, result as u64); + self.pc += 1; + } + None => { + self.set_exception("Integer overflow"); + } + } + } + + /// Implements the `NotEqualBoolean` opcode. + pub(super) fn do_not_equal_boolean(&mut self, instr: u32) { + self.do_binary_boolean_op(instr, bytecode::parse_not_equal_boolean, |l, r| l != r); + } + + /// Implements the `NotEqualDouble` opcode. + pub(super) fn do_not_equal_double(&mut self, instr: u32) { + self.do_binary_double_predicate_op(instr, bytecode::parse_not_equal_double, |l, r| l != r); + } + + /// Implements the `NotEqualInteger` opcode. + pub(super) fn do_not_equal_integer(&mut self, instr: u32) { + self.do_binary_integer_predicate_op(instr, bytecode::parse_not_equal_integer, |l, r| { + l != r + }); + } + + /// Implements the `NotEqualText` opcode. + pub(super) fn do_not_equal_text( + &mut self, + instr: u32, + constants: &[ConstantDatum], + heap: &[HeapDatum], + ) { + self.do_binary_text_op(instr, constants, heap, bytecode::parse_not_equal_text, |l, r| { + l != r + }); + } + + /// Implements the `Nop` opcode. + pub(super) fn do_nop(&mut self, instr: u32) { + bytecode::parse_nop(instr); + self.pc += 1; + } + + /// Implements the `PowerDouble` opcode. + pub(super) fn do_power_double(&mut self, instr: u32) { + self.do_binary_double_op(instr, bytecode::parse_power_double, |l, r| l.powf(r)); + } + + /// Implements the `PowerInteger` opcode. + pub(super) fn do_power_integer(&mut self, instr: u32) { + let (dest, src1, src2) = bytecode::parse_power_integer(instr); + let lhs = self.get_reg(src1) as i32; + let rhs = self.get_reg(src2) as i32; + let exp = match u32::try_from(rhs) { + Ok(exp) => exp, + Err(_) => { + self.set_exception(format!("Exponent {} cannot be negative", rhs)); + return; + } + }; + match checked_pow_integer(lhs, exp) { + Ok(result) => { + self.set_reg(dest, result as u64); + self.pc += 1; + } + Err(msg) => { + self.set_exception(msg); + } + } + } + + /// Implements the `Return` opcode. + pub(super) fn do_return(&mut self, instr: u32) { + bytecode::parse_return(instr); + let frame = match self.call_stack.pop() { + Some(frame) => frame, + None => { + self.set_exception("RETURN without GOSUB or FUNCTION call"); + return; + } + }; + if let Some(ret_reg) = frame.ret_reg { + let return_value = self.get_reg(Register::local(0).unwrap()); + self.pc = frame.old_pc + 1; + self.fp = frame.old_fp; + self.set_reg(ret_reg, return_value); + } else { + self.pc = frame.old_pc + 1; + self.fp = frame.old_fp; + } + } + + /// Implements the `SetErrorHandler` opcode. + pub(super) fn do_set_error_handler(&mut self, instr: u32) { + let (mode, target) = bytecode::parse_set_error_handler(instr); + self.err_handler = match mode { + ErrorHandlerMode::None => ErrorHandler::None, + ErrorHandlerMode::ResumeNext => ErrorHandler::ResumeNext, + ErrorHandlerMode::Jump => ErrorHandler::Jump(usize::from(target)), + }; + self.pc += 1; + } + + /// Implements the `ShiftLeft` opcode. + pub(super) fn do_shift_left(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_shift_left, checked_shl_integer); + } + + /// Implements the `ShiftRight` opcode. + pub(super) fn do_shift_right(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_shift_right, checked_shr_integer); + } + + /// Implements the `StoreArray` opcode. + pub(super) fn do_store_array(&mut self, instr: u32, heap: &mut [HeapDatum]) { + let (arr_reg, val_reg, first_sub_reg) = bytecode::parse_store_array(instr); + + let value = self.get_reg(val_reg); + if let Some((heap_idx, flat_idx)) = self.resolve_array_index(arr_reg, first_sub_reg, heap) { + let array = match &mut heap[heap_idx] { + HeapDatum::Array(a) => a, + _ => unreachable!("Register must point to an array"), + }; + array.values[flat_idx] = value; + self.pc += 1; + } + } + + /// Implements the `SubtractDouble` opcode. + pub(super) fn do_subtract_double(&mut self, instr: u32) { + self.do_binary_double_op(instr, bytecode::parse_subtract_double, |l, r| l - r); + } + + /// Implements the `SubtractInteger` opcode. + pub(super) fn do_subtract_integer(&mut self, instr: u32) { + self.do_binary_integer_op(instr, bytecode::parse_subtract_integer, checked_sub_integer); + } + + /// Implements the `Upcall` opcode. + pub(super) fn do_upcall(&mut self, instr: u32) { + let (index, first_reg) = bytecode::parse_upcall(instr); + let upcall_pc = self.pc; + self.pc += 1; + self.stop = Some(InternalStopReason::Upcall(index, first_reg, upcall_pc)); + } +} diff --git a/core2/src/vm/mod.rs b/core2/src/vm/mod.rs new file mode 100644 index 00000000..b880fa5c --- /dev/null +++ b/core2/src/vm/mod.rs @@ -0,0 +1,656 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Virtual machine for EndBASIC execution. + +use crate::ast::ExprType; +use crate::bytecode::{ExitCode, Register}; +use crate::callable::{Callable, Scope}; +use crate::compiler::SymbolKey; +use crate::image::Image; +use crate::mem::{ConstantDatum, DatumPtr, HeapDatum}; +use crate::reader::LineCol; +use crate::{CallError, CallResult}; +use std::collections::HashMap; +use std::rc::Rc; + +mod context; +use context::{Context, ErrorHandler, InternalStopReason}; + +/// Error returned when a global variable access encounters a type or shape mismatch. +/// +/// This is distinct from a missing variable, which is represented by `None` in the +/// return value of `get_global` and `get_global_array`. +#[derive(Debug, thiserror::Error)] +pub enum GetGlobalError { + /// The variable exists but is an array; use `get_global_array` instead. + #[error("'{0}' is an array variable; use get_global_array to access it")] + IsArray(String), + + /// The variable exists but is a scalar; use `get_global` instead. + #[error("'{0}' is a scalar variable; use get_global to access it")] + IsScalar(String), + + /// The array subscripts are out of bounds or invalid. + #[error("{0}")] + SubscriptOutOfBounds(String), +} + +/// Result type for global variable access operations. +pub type GetGlobalResult = Result; + +/// Opaque handle to invoke a pending upcall. +pub struct UpcallHandler<'a> { + vm: &'a mut Vm, + image: &'a Image, +} + +impl<'a> UpcallHandler<'a> { + /// Invokes the pending upcall. + pub async fn invoke(self) -> CallResult<()> { + let vm = self.vm; + let image = self.image; + let (index, first_reg, upcall_pc) = vm + .pending_upcall + .take() + .expect("This is only reachable when the VM has a pending upcall"); + let upcall = vm.upcalls[usize::from(index)].clone(); + match upcall.exec(vm.upcall_scope(image, first_reg, upcall_pc)).await { + Ok(()) => Ok(()), + e @ Err(CallError::NeedsClear) => e, + Err(e) => { + let pos_override = match e { + CallError::Syntax(pos, _) => Some(pos), + _ => None, + }; + vm.handle_exception(image, upcall_pc, e.to_string(), pos_override); + Ok(()) + } + } + } +} + +/// Representation of termination states from program execution. +pub enum StopReason<'a> { + /// Execution terminated due to an `END` instruction. + End(ExitCode), + + /// Execution terminated due to natural fallthrough. + Eof, + + /// Execution stopped due to an instruction-level exception. + Exception(LineCol, String), + + /// Execution stopped due to an upcall that requires service from the caller. + Upcall(UpcallHandler<'a>), +} + +/// Virtual machine for EndBASIC program execution. +pub struct Vm { + /// Mapping of all available upcall names to their handlers. + upcalls_by_name: HashMap>, + + /// Upcall names already resolved into `upcalls`. + upcall_names: Vec, + + /// Upcalls used by the current image in index order. + upcalls: Vec>, + + /// Heap memory for dynamic allocations. + heap: Vec, + + /// Processor context for execution. + context: Context, + + /// Last error seen by the VM, if any. + last_error: Option, + + /// Pending exception to report to the caller. + pending_exception: Option<(LineCol, String)>, + + /// Details about the pending upcall that has to be handled by the caller. + /// + /// The tuple contains the upcall index, the first argument register, and the PC of the + /// UPCALL instruction (for arg position lookup in `DebugInfo`). + pending_upcall: Option<(u16, Register, usize)>, +} + +impl Vm { + /// Creates a new VM with the given `upcalls_by_name` as the available built-in callables. + pub fn new(upcalls_by_name: HashMap>) -> Self { + Self { + upcalls_by_name, + upcall_names: vec![], + upcalls: vec![], + heap: vec![], + context: Context::default(), + last_error: None, + pending_exception: None, + pending_upcall: None, + } + } + + /// Resets any existing execution state. + pub fn reset(&mut self) { + self.upcall_names.clear(); + self.upcalls.clear(); + self.heap.clear(); + self.context = Context::default(); + self.last_error = None; + self.pending_exception = None; + self.pending_upcall = None; + } + + /// Synchronizes cached upcall handlers with the externally-owned `image`. + fn sync_upcalls(&mut self, image: &Image) { + debug_assert!( + image.upcalls.starts_with(self.upcall_names.as_slice()), + "Vm::reset() is required before executing a different image", + ); + + for key in &image.upcalls[self.upcalls.len()..] { + self.upcalls.push( + self.upcalls_by_name + .get(key) + .expect("All upcalls exposed during compilation must be present at runtime") + .clone(), + ); + self.upcall_names.push(key.clone()); + } + } + + /// Parks execution at the current EOF instruction so later appended code can resume. + fn park_at_eof(&mut self, image: &Image) { + debug_assert!(!image.code.is_empty()); + self.context.set_pc(image.code.len() - 1); + } + + /// Constructs a `Scope` for an upcall with arguments starting at `reg`. + /// + /// `upcall_pc` is the address of the UPCALL instruction in the image, used to look up + /// per-argument source locations from `DebugInfo`. + fn upcall_scope<'a>( + &'a mut self, + image: &'a Image, + reg: Register, + upcall_pc: usize, + ) -> Scope<'a> { + let arg_linecols = image + .debug_info + .instrs + .get(upcall_pc) + .map(|m| m.arg_linecols.as_slice()) + .unwrap_or(&[]); + self.context.upcall_scope( + reg, + image.constants.as_slice(), + &mut self.heap, + arg_linecols, + &self.last_error, + image.data.as_slice(), + ) + } + + /// Handles an exception raised at `pc` with `message`. Returns true if the error was handled. + fn handle_exception( + &mut self, + image: &Image, + pc: usize, + message: String, + pos_override: Option, + ) -> bool { + let pos = pos_override.unwrap_or(image.debug_info.instrs[pc].linecol); + self.last_error = Some(format!("{}: {}", pos, message)); + self.pending_exception = None; + + match self.context.error_handler() { + ErrorHandler::None => { + self.pending_exception = Some((pos, message)); + false + } + ErrorHandler::Jump(addr) => { + self.context.set_pc(addr); + true + } + ErrorHandler::ResumeNext => { + let mut next_pc = image.code.len(); + for (idx, meta) in image.debug_info.instrs.iter().enumerate().skip(pc + 1) { + if meta.is_stmt_start { + next_pc = idx; + break; + } + } + self.context.set_pc(next_pc); + true + } + } + } + + /// Returns the value of the global scalar variable `key` as a `ConstantDatum`. + /// + /// Returns `Ok(None)` if the variable is not defined (no image is loaded or the + /// variable was not declared). Returns `Err` if the variable exists but is an + /// array; in that case, use `get_global_array` instead. + pub fn get_global( + &self, + image: &Image, + key: &SymbolKey, + ) -> GetGlobalResult> { + let Some(info) = image.debug_info.global_vars.get(key) else { + return Ok(None); + }; + if info.ndims != 0 { + return Err(GetGlobalError::IsArray(key.to_string())); + } + let raw = self.context.get_global_reg_raw(info.reg); + let datum = match info.subtype { + ExprType::Boolean => ConstantDatum::Boolean(raw != 0), + ExprType::Double => ConstantDatum::Double(f64::from_bits(raw)), + ExprType::Integer => ConstantDatum::Integer(raw as i32), + ExprType::Text => { + let ptr = DatumPtr::from(raw); + ConstantDatum::Text(ptr.resolve_string(&image.constants, &self.heap).to_owned()) + } + }; + Ok(Some(datum)) + } + + /// Returns the value of an element in the global array variable `key` at the given + /// `subscripts` as a `ConstantDatum`. + /// + /// Returns `Ok(None)` if the variable is not defined (no image is loaded or the + /// variable was not declared). Returns `Err` if the variable exists but is a scalar + /// (use `get_global` instead), or if the subscripts are out of bounds. + pub fn get_global_array( + &self, + image: &Image, + key: &SymbolKey, + subscripts: &[i32], + ) -> GetGlobalResult> { + let Some(info) = image.debug_info.global_vars.get(key) else { + return Ok(None); + }; + if info.ndims == 0 { + return Err(GetGlobalError::IsScalar(key.to_string())); + } + let raw = self.context.get_global_reg_raw(info.reg); + let ptr = DatumPtr::from(raw); + let heap_idx = ptr.heap_index(); + let HeapDatum::Array(a) = &self.heap[heap_idx] else { + panic!("Array variable does not point to an array on the heap"); + }; + let flat_idx = a.flat_index(subscripts).map_err(GetGlobalError::SubscriptOutOfBounds)?; + let v = a.values[flat_idx]; + let datum = match info.subtype { + ExprType::Boolean => ConstantDatum::Boolean(v != 0), + ExprType::Double => ConstantDatum::Double(f64::from_bits(v)), + ExprType::Integer => ConstantDatum::Integer(v as i32), + ExprType::Text => { + let ptr = DatumPtr::from(v); + ConstantDatum::Text(ptr.resolve_string(&image.constants, &self.heap).to_owned()) + } + }; + Ok(Some(datum)) + } + + /// Starts or resumes execution of `image`. + /// + /// Returns a `StopReason` indicating why execution stopped, which may be due to program + /// termination, an exception, or a pending upcall that requires caller handling. + pub fn exec<'a>(&'a mut self, image: &'a Image) -> StopReason<'a> { + self.sync_upcalls(image); + + loop { + if let Some((pos, message)) = self.pending_exception.take() { + self.park_at_eof(image); + return StopReason::Exception(pos, message); + } + + if self.pending_upcall.is_some() { + return StopReason::Upcall(UpcallHandler { vm: self, image }); + } + + match self.context.exec(image, &mut self.heap) { + InternalStopReason::End(code) => { + self.park_at_eof(image); + return StopReason::End(code); + } + InternalStopReason::Eof => return StopReason::Eof, + InternalStopReason::Exception(pc, e) => { + if !self.handle_exception(image, pc, e, None) + && let Some((pos, message)) = self.pending_exception.take() + { + self.park_at_eof(image); + return StopReason::Exception(pos, message); + } + } + InternalStopReason::Upcall(index, first_reg, upcall_pc) => { + self.pending_upcall = Some((index, first_reg, upcall_pc)); + return StopReason::Upcall(UpcallHandler { vm: self, image }); + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::Compiler; + use crate::ast::{ArgSep, ExprType}; + use crate::callable::{ + ArgSepSyntax, CallResult, CallableMetadata, CallableMetadataBuilder, RequiredValueSyntax, + SingularArgSyntax, + }; + use crate::compiler::SymbolKey; + use crate::image::Image; + use crate::reader::LineCol; + use crate::testutils::OutCommand; + use async_trait::async_trait; + use std::borrow::Cow; + use std::cell::RefCell; + use std::collections::HashMap; + use std::rc::Rc; + + /// A test callable that captures the source positions of argument register slots. + /// + /// On each invocation, records the result of `scope.get_pos(n)` for `0..nargs` into + /// `positions`. + struct PosCapture { + metadata: Rc, + nargs: u8, + positions: Rc>>, + } + + impl PosCapture { + /// Creates a new `PosCapture` callable named `POS_CAPTURE` that expects + /// `nargs` required integer arguments separated by commas. + fn new(nargs: u8, positions: Rc>>) -> Rc { + let singular: Vec = (0..nargs) + .map(|i| { + let sep = if i == nargs - 1 { + ArgSepSyntax::End + } else { + ArgSepSyntax::Exactly(ArgSep::Long) + }; + SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg"), + vtype: ExprType::Integer, + }, + sep, + ) + }) + .collect(); + let md = CallableMetadataBuilder::new("POS_CAPTURE") + .with_dynamic_syntax(vec![(singular, None)]) + .test_build(); + Rc::from(Self { metadata: md, nargs, positions }) + } + } + + #[async_trait(?Send)] + impl Callable for PosCapture { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut positions = self.positions.borrow_mut(); + for i in 0..self.nargs { + positions.push(scope.get_pos(i)); + } + Ok(()) + } + } + + /// Runs the VM to completion, invoking every upcall as it is encountered. + async fn run_to_end(vm: &mut Vm, image: &Image) { + loop { + match vm.exec(image) { + StopReason::End(_) => break, + StopReason::Eof => break, + StopReason::Exception(_, msg) => panic!("Unexpected exception: {}", msg), + StopReason::Upcall(handler) => handler.invoke().await.unwrap(), + } + } + } + + #[test] + fn test_exec_without_load_is_eof() { + let mut vm = Vm::new(HashMap::default()); + let image = Image::default(); + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Unexpected stop reason"), + } + } + + #[test] + fn test_exec_empty_image_is_eof() { + let mut vm = Vm::new(HashMap::default()); + let image = Image::default(); + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Unexpected stop reason"), + } + } + + #[test] + fn test_exec_empty_compilation_is_eof() { + let mut vm = Vm::new(HashMap::default()); + let compiler = Compiler::new(&HashMap::default(), &[]).unwrap(); + let image = compiler.compile(&mut b"".as_slice()).unwrap(); + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Unexpected stop reason"), + } + } + + #[tokio::test] + async fn test_exec_upcall_flow() { + let data = Rc::from(RefCell::from(vec![])); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("OUT"), OutCommand::new(data.clone())); + + let compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let image = compiler.compile(&mut b"OUT 30: OUT 20".as_slice()).unwrap(); + + let mut vm = Vm::new(upcalls_by_name); + + match vm.exec(&image) { + StopReason::Upcall(_handler) => (), + _ => panic!("First exec should stop at the first upcall"), + } + assert!(data.borrow().is_empty()); + + match vm.exec(&image) { + StopReason::Upcall(handler) => handler.invoke().await.unwrap(), + _ => panic!("Second exec should stop at the same upcall (not yet executed)"), + } + assert_eq!(["30"], *data.borrow().as_slice()); + + match vm.exec(&image) { + StopReason::Upcall(handler) => handler.invoke().await.unwrap(), + _ => panic!("Third exec should stop at the second upcall"), + } + assert_eq!(["30", "20"], *data.borrow().as_slice()); + + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Fourth exec should stop at EOF"), + } + assert_eq!(["30", "20"], *data.borrow().as_slice()); + } + + #[tokio::test] + async fn test_exec_end_code_default() { + let mut vm = Vm::new(HashMap::default()); + let compiler = Compiler::new(&HashMap::default(), &[]).unwrap(); + let image = compiler.compile(&mut b"END".as_slice()).unwrap(); + match vm.exec(&image) { + StopReason::End(code) if code.is_success() => (), + _ => panic!("Unexpected stop reason"), + } + } + + #[tokio::test] + async fn test_exec_end_code_explicit() { + let mut vm = Vm::new(HashMap::default()); + let compiler = Compiler::new(&HashMap::default(), &[]).unwrap(); + let image = compiler.compile(&mut b"END 3".as_slice()).unwrap(); + match vm.exec(&image) { + StopReason::End(code) if code.to_i32() == 3 => (), + _ => panic!("Unexpected stop reason"), + } + } + + #[tokio::test] + async fn test_exec_end_can_resume_after_append() { + let data = Rc::from(RefCell::from(vec![])); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("OUT"), OutCommand::new(data.clone())); + + let mut compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let mut image = Image::default(); + compiler.compile_more(&mut image, &mut b"END 3".as_slice()).unwrap(); + + let mut vm = Vm::new(upcalls_by_name); + match vm.exec(&image) { + StopReason::End(code) if code.to_i32() == 3 => (), + _ => panic!("Unexpected stop reason"), + } + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Execution should park at EOF after END"), + } + + compiler.compile_more(&mut image, &mut b"OUT 2".as_slice()).unwrap(); + match vm.exec(&image) { + StopReason::Upcall(handler) => handler.invoke().await.unwrap(), + _ => panic!("Execution should resume at newly appended code"), + } + assert_eq!(["2"], *data.borrow().as_slice()); + + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Execution should stop at EOF after appended code"), + } + } + + #[tokio::test] + async fn test_exec_exception_can_resume_after_append() { + let data = Rc::from(RefCell::from(vec![])); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("OUT"), OutCommand::new(data.clone())); + + let mut compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let mut image = Image::default(); + compiler.compile_more(&mut image, &mut b"a = 1 / 0".as_slice()).unwrap(); + + let mut vm = Vm::new(upcalls_by_name); + match vm.exec(&image) { + StopReason::Exception(_, msg) if msg == "Division by zero" => (), + _ => panic!("Unexpected stop reason"), + } + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Execution should park at EOF after an exception"), + } + + compiler.compile_more(&mut image, &mut b"OUT 2".as_slice()).unwrap(); + match vm.exec(&image) { + StopReason::Upcall(handler) => handler.invoke().await.unwrap(), + _ => panic!("Execution should resume at newly appended code"), + } + assert_eq!(["2"], *data.borrow().as_slice()); + + match vm.exec(&image) { + StopReason::Eof => (), + _ => panic!("Execution should stop at EOF after appended code"), + } + } + + #[tokio::test] + async fn test_scope_get_pos_no_args() { + let positions: Rc>> = Rc::default(); + let cmd = PosCapture::new(0, positions.clone()); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("POS_CAPTURE"), cmd); + + let compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let image = compiler.compile(&mut b"POS_CAPTURE".as_slice()).unwrap(); + let mut vm = Vm::new(upcalls_by_name); + run_to_end(&mut vm, &image).await; + + let pos = positions.borrow(); + assert_eq!(&[] as &[LineCol], pos.as_slice()); + } + + #[tokio::test] + async fn test_scope_get_pos_single_arg() { + let positions: Rc>> = Rc::default(); + let cmd = PosCapture::new(1, positions.clone()); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("POS_CAPTURE"), cmd); + + let compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let image = compiler.compile(&mut b"POS_CAPTURE 42".as_slice()).unwrap(); + let mut vm = Vm::new(upcalls_by_name); + run_to_end(&mut vm, &image).await; + + let pos = positions.borrow(); + assert_eq!(&[LineCol { line: 1, col: 13 }], pos.as_slice()); + } + + #[tokio::test] + async fn test_scope_get_pos_multiple_args() { + let positions: Rc>> = Rc::default(); + let cmd = PosCapture::new(3, positions.clone()); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("POS_CAPTURE"), cmd); + + let compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let image = compiler.compile(&mut b"POS_CAPTURE 1, 2, 3".as_slice()).unwrap(); + let mut vm = Vm::new(upcalls_by_name); + run_to_end(&mut vm, &image).await; + + let pos = positions.borrow(); + assert_eq!( + &[ + LineCol { line: 1, col: 13 }, + LineCol { line: 1, col: 16 }, + LineCol { line: 1, col: 19 } + ], + pos.as_slice() + ); + } + + #[tokio::test] + async fn test_scope_get_pos_expression_arg() { + let positions: Rc>> = Rc::default(); + let cmd = PosCapture::new(1, positions.clone()); + let mut upcalls_by_name: HashMap> = HashMap::new(); + upcalls_by_name.insert(SymbolKey::from("POS_CAPTURE"), cmd); + + let compiler = Compiler::new(&upcalls_by_name, &[]).unwrap(); + let image = compiler.compile(&mut b"POS_CAPTURE 1 + 2".as_slice()).unwrap(); + let mut vm = Vm::new(upcalls_by_name); + run_to_end(&mut vm, &image).await; + + let pos = positions.borrow(); + assert_eq!(&[LineCol { line: 1, col: 13 }], pos.as_slice()); + } +} diff --git a/core2/tests/config.out b/core2/tests/config.out new file mode 100644 index 00000000..465bd373 --- /dev/null +++ b/core2/tests/config.out @@ -0,0 +1,11 @@ +foo_value% = 123 +result_total% = 579 +status$ = "Processing complete" +defined_within% = 42 +optional_flag? = false +injected_value% = 6 +unknown is not declared +results%(0) = 10 +results%(1) = 20 +results%(2) = 30 +foo_value%(0): error: 'FOO_VALUE' is a scalar variable; use get_global to access it diff --git a/core2/tests/examples_test.rs b/core2/tests/examples_test.rs new file mode 100644 index 00000000..1ea0592b --- /dev/null +++ b/core2/tests/examples_test.rs @@ -0,0 +1,129 @@ +// EndBASIC +// Copyright 2020 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Integration tests that use golden input and output files. + +use std::env; +use std::fs::File; +use std::io::Read; +use std::path::{Path, PathBuf}; +use std::process; + +/// Computes the path to the directory where this test's binary lives. +fn self_dir() -> PathBuf { + let self_exe = env::current_exe().expect("Cannot get self's executable path"); + let dir = self_exe.parent().expect("Cannot get self's directory"); + assert!(dir.ends_with("target/debug/deps") || dir.ends_with("target/release/deps")); + dir.to_owned() +} + +/// Computes the path to the built binary `name`. +fn bin_path>(name: P) -> PathBuf { + let test_dir = self_dir(); + let debug_or_release_dir = test_dir.parent().expect("Failed to get parent directory"); + debug_or_release_dir.join(name).with_extension(env::consts::EXE_EXTENSION) +} + +/// Computes the path to the source file `name`. +fn src_path(name: &str) -> PathBuf { + let test_dir = self_dir(); + let debug_or_release_dir = test_dir.parent().expect("Failed to get parent directory"); + let target_dir = debug_or_release_dir.parent().expect("Failed to get parent directory"); + let dir = target_dir.parent().expect("Failed to get parent directory"); + + // Sanity-check that we landed in the right location. + assert!(dir.join("Cargo.toml").exists()); + + dir.join(name) +} + +/// Describes the behavior for one of the three streams (stdin, stdout, stderr) connected to a +/// program. +enum Behavior { + /// Ensure the stream is silent. + Null, + + /// If stdin, feed the given path as the program's input. If stdout/stderr, expect the contents + /// of the stream to match this file. + File(PathBuf), +} + +/// Reads the contents of a golden data file. +fn read_golden(path: &Path) -> String { + let mut f = File::open(path).expect("Failed to open golden data file"); + let mut golden = vec![]; + f.read_to_end(&mut golden).expect("Failed to read golden data file"); + let raw = String::from_utf8(golden).expect("Golden data file is not valid UTF-8"); + if cfg!(target_os = "windows") { raw.replace("\r\n", "\n") } else { raw } +} + +/// Runs `bin` with arguments `args` and checks its behavior against expectations. +/// +/// `exp_code` is the expected error code from the program. `stdin_behavior` indicates what to feed +/// to the program's stdin. `stdout_behavior` and `stderr_behavior` indicate what to expect from +/// the program's textual output. +fn check>( + bin: P, + args: &[&str], + exp_code: i32, + stdin_behavior: Behavior, + stdout_behavior: Behavior, + stderr_behavior: Behavior, +) { + let golden_stdin = match stdin_behavior { + Behavior::Null => process::Stdio::null(), + Behavior::File(path) => File::open(path).unwrap().into(), + }; + + let exp_stdout = match stdout_behavior { + Behavior::Null => "".to_owned(), + Behavior::File(path) => read_golden(&path), + }; + + let exp_stderr = match stderr_behavior { + Behavior::Null => "".to_owned(), + Behavior::File(path) => read_golden(&path), + }; + + let result = process::Command::new(bin.as_ref()) + .args(args) + .stdin(golden_stdin) + .output() + .expect("Failed to execute subprocess"); + let code = result.status.code().expect("Subprocess didn't exit cleanly"); + let stdout = String::from_utf8(result.stdout).expect("Stdout not is not valid UTF-8"); + let stderr = String::from_utf8(result.stderr).expect("Stderr not is not valid UTF-8"); + + if exp_code != code || exp_stdout != stdout || exp_stderr != stderr { + eprintln!("Exit code: {}", code); + eprintln!("stdout:\n{}", stdout); + eprintln!("stderr:\n{}", stderr); + assert_eq!(exp_code, code); + assert_eq!(exp_stdout, stdout); + assert_eq!(exp_stderr, stderr); + } +} + +#[test] +fn test_config() { + check( + bin_path("examples/core2-config"), + &[], + 0, + Behavior::Null, + Behavior::File(src_path("core2/tests/config.out")), + Behavior::Null, + ); +} diff --git a/core2/tests/integration_test.rs b/core2/tests/integration_test.rs new file mode 100644 index 00000000..24d4d11e --- /dev/null +++ b/core2/tests/integration_test.rs @@ -0,0 +1,124 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Integration tests for the core language. + +use std::fs::{self, File}; +use std::io::{self, BufRead, BufReader}; + +mod testutils; +use testutils::*; + +/// Instantiates a test case for the test described in `core2/tests/.md`. +macro_rules! one_test { + ( $name:ident ) => { + #[tokio::test] + async fn $name() -> io::Result<()> { + run_one_test(stringify!($name)).await + } + }; +} + +one_test!(test_args); +one_test!(test_arithmetic_add); +one_test!(test_arithmetic_div); +one_test!(test_arithmetic_mod); +one_test!(test_arithmetic_mul); +one_test!(test_arithmetic_neg); +one_test!(test_arithmetic_pow); +one_test!(test_arithmetic_sub); +one_test!(test_arrays); +one_test!(test_assignments); +one_test!(test_bitwise_and); +one_test!(test_bitwise_not); +one_test!(test_bitwise_or); +one_test!(test_bitwise_shl); +one_test!(test_bitwise_shr); +one_test!(test_bitwise_xor); +one_test!(test_call_errors); +one_test!(test_case_insensitivity); +one_test!(test_data); +one_test!(test_do); +one_test!(test_empty); +one_test!(test_end); +one_test!(test_for); +one_test!(test_functions); +one_test!(test_globals); +one_test!(test_gosub); +one_test!(test_goto); +one_test!(test_if); +one_test!(test_incremental); +one_test!(test_locals); +one_test!(test_on_error); +one_test!(test_out_of_registers); +one_test!(test_relational_eq); +one_test!(test_relational_ge); +one_test!(test_relational_gt); +one_test!(test_relational_le); +one_test!(test_relational_lt); +one_test!(test_relational_ne); +one_test!(test_select); +one_test!(test_strings); +one_test!(test_subs); +one_test!(test_types); +one_test!(test_unary_neg_depth); +one_test!(test_unary_not_depth); +one_test!(test_while); + +#[test] +fn test_all_md_files_registered() -> io::Result<()> { + let mut registered = vec![]; + { + let file = File::open(src_path("core2/tests/integration_test.rs"))?; + let reader = BufReader::new(file); + for line in reader.lines() { + let line = line?; + + if line.starts_with("one_test!(") { + let name = &line["one_test!(".len()..line.len() - 2]; + registered.push(format!("{}.md", name)); + } + } + } + + // Sanity-check to ensure that the code right above actually discovered what we expect. + assert!(registered.iter().any(|s| s == "test_types.md")); + + // Make sure that every md test case definition in the file system is in the list of + // tests discovered from code scanning. We don't have to do the opposite because, if + // this program registers a md file that doesn't actually exist, the test itself will + // fail. + let mut found = vec![]; + for entry in fs::read_dir(src_path("core2/tests"))? { + let entry = entry?; + + let Ok(name) = entry.file_name().into_string() else { + continue; + }; + + #[allow(clippy::collapsible_if)] + if name.starts_with("test_") && name.ends_with(".md") { + found.push(name); + } + } + + // We want the list of tests below to be sorted, so sort the list of found tests and + // use that when comparing against the list of registered tests. + found.sort(); + + assert_eq!(registered, found); + + Ok(()) +} diff --git a/core2/tests/test_args.md b/core2/tests/test_args.md new file mode 100644 index 00000000..4bf7376c --- /dev/null +++ b/core2/tests/test_args.md @@ -0,0 +1,794 @@ +# Test: Singular required argument, not provided + +## Source + +```basic +OUT_REQUIRED_VALUE +``` + +## Compilation errors + +```plain +1:1: OUT_REQUIRED_VALUE expected arg% +``` + +# Test: Singular required argument, mismatched type + +## Source + +```basic +OUT_REQUIRED_VALUE "Foo" +``` + +## Compilation errors + +```plain +1:20: STRING is not a number +``` + +# Test: Singular required argument, correct type + +## Source + +```basic +OUT_REQUIRED_VALUE 4 +``` + +## Disassembly + +```asm +0000: LOADI R64, 4 ; 1:20 +0001: UPCALL 0, R64 ; 1:1, OUT_REQUIRED_VALUE +0002: EOF ; 0:0 +``` + +## Output + +```plain +4 +``` + +# Test: Singular required argument, type casting + +## Source + +```basic +OUT_REQUIRED_VALUE 7.8 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:20 +0001: DTOI R64 ; 1:20 +0002: UPCALL 0, R64 ; 1:1, OUT_REQUIRED_VALUE +0003: EOF ; 0:0 +``` + +## Output + +```plain +8 +``` + +# Test: Singular optional argument, not provided + +## Source + +```basic +OUT_OPTIONAL +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:1 +0001: UPCALL 0, R64 ; 1:1, OUT_OPTIONAL +0002: EOF ; 0:0 +``` + +## Output + +```plain +() +``` + +# Test: Singular optional argument, provided + +## Source + +```basic +OUT_OPTIONAL "Foo" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:14 +0001: LOADI R64, 259 ; 1:14 +0002: UPCALL 0, R64 ; 1:1, OUT_OPTIONAL +0003: EOF ; 0:0 +``` + +## Output + +```plain +Foo$ +``` + +# Test: Singular optional argument, too many provided + +## Source + +```basic +OUT_OPTIONAL "Foo", "Bar" +``` + +## Compilation errors + +```plain +1:1: OUT_OPTIONAL expected [arg$] +``` + +# Test: Singular argument of any type, not optional + +## Source + +```basic +OUT_ANY_VALUE TRUE +OUT_ANY_VALUE "Text" +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:15 +0001: LOADI R64, 256 ; 1:15 +0002: UPCALL 0, R64 ; 1:1, OUT_ANY_VALUE +0003: LOADI R65, 0 ; 2:15 +0004: LOADI R64, 259 ; 2:15 +0005: UPCALL 0, R64 ; 2:1, OUT_ANY_VALUE +0006: EOF ; 0:0 +``` + +## Output + +```plain +true? +Text$ +``` + +# Test: Singular argument of any type, too many provided + +## Source + +```basic +OUT_ANY_VALUE TRUE, FALSE +``` + +## Compilation errors + +```plain +1:1: OUT_ANY_VALUE expected arg +``` + +# Test: Singular argument of any type, optional + +## Source + +```basic +OUT_ANY_VALUE_OPTIONAL +OUT_ANY_VALUE_OPTIONAL TRUE +OUT_ANY_VALUE_OPTIONAL "Text" +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:1 +0001: UPCALL 0, R64 ; 1:1, OUT_ANY_VALUE_OPTIONAL +0002: LOADI R65, 1 ; 2:24 +0003: LOADI R64, 256 ; 2:24 +0004: UPCALL 0, R64 ; 2:1, OUT_ANY_VALUE_OPTIONAL +0005: LOADI R65, 0 ; 3:24 +0006: LOADI R64, 259 ; 3:24 +0007: UPCALL 0, R64 ; 3:1, OUT_ANY_VALUE_OPTIONAL +0008: EOF ; 0:0 +``` + +## Output + +```plain +() +true? +Text$ +``` + +# Test: Singular argument of any type, too many provided + +## Source + +```basic +OUT_ANY_VALUE_OPTIONAL "Text", 3 +``` + +## Compilation errors + +```plain +1:1: OUT_ANY_VALUE_OPTIONAL expected [arg] +``` + +# Test: Singular arguments of various kinds, with type casting + +## Source + +```basic +OUT_POSITIONAL 3, 5.6 AS "Foo" +OUT_POSITIONAL "A"; 4 AS "Foo" +OUT_POSITIONAL ; 0 AS 8.2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:16 +0001: LOADI R64, 290 ; 1:16 +0002: LOADC R66, 0 ; 1:19 +0003: DTOI R66 ; 1:19 +0004: LOADI R68, 1 ; 1:26 +0005: LOADI R67, 259 ; 1:26 +0006: UPCALL 0, R64 ; 1:1, OUT_POSITIONAL +0007: LOADI R65, 2 ; 2:16 +0008: LOADI R64, 275 ; 2:16 +0009: LOADI R66, 4 ; 2:21 +0010: LOADI R68, 1 ; 2:26 +0011: LOADI R67, 259 ; 2:26 +0012: UPCALL 0, R64 ; 2:1, OUT_POSITIONAL +0013: LOADI R64, 16 ; 3:16 +0014: LOADI R65, 0 ; 3:18 +0015: LOADC R67, 3 ; 3:23 +0016: LOADI R66, 257 ; 3:23 +0017: UPCALL 0, R64 ; 3:1, OUT_POSITIONAL +0018: EOF ; 0:0 +``` + +## Output + +```plain +3% +6 +Foo$ +A$ +4 +Foo$ +() +0 +8.2# +``` + +# Test: Singular arguments of various kinds, mismatched separators + +## Source + +```basic +OUT_POSITIONAL 3 AS 5.6 AS "Foo" +``` + +## Compilation errors + +```plain +1:18: OUT_POSITIONAL expected [arg1] <,|;> arg2% AS arg3 +``` + +# Test: Singular arguments of various kinds, second separator mismatched + +## Source + +```basic +OUT_POSITIONAL 3, 5; "Foo" +``` + +## Compilation errors + +```plain +1:20: OUT_POSITIONAL expected [arg1] <,|;> arg2% AS arg3 +``` + +# Test: Repeated arguments, none provided + +## Source + +```basic +OUT +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:1 +0001: UPCALL 0, R64 ; 1:1, OUT +0002: EOF ; 0:0 +``` + +## Output + +```plain +0=() +``` + +# Test: Repeated arguments, several present + +## Source + +```basic +OUT 100, 200, 300 +``` + +## Disassembly + +```asm +0000: LOADI R65, 100 ; 1:5 +0001: LOADI R64, 290 ; 1:5 +0002: LOADI R67, 200 ; 1:10 +0003: LOADI R66, 290 ; 1:10 +0004: LOADI R69, 300 ; 1:15 +0005: LOADI R68, 258 ; 1:15 +0006: UPCALL 0, R64 ; 1:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=100% , 1=200% , 2=300% +``` + +# Test: Repeated arguments, some missing + +## Source + +```basic +OUT 100, , 300, +``` + +## Disassembly + +```asm +0000: LOADI R65, 100 ; 1:5 +0001: LOADI R64, 290 ; 1:5 +0002: LOADI R66, 32 ; 1:10 +0003: LOADI R68, 300 ; 1:12 +0004: LOADI R67, 290 ; 1:12 +0005: LOADI R69, 0 ; 1:16 +0006: UPCALL 0, R64 ; 1:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=100% , 1=() , 2=300% , 3=() +``` + +# Test: Repeated arguments, different separators + +## Source + +```basic +OUT 100; 200 AS 300; 400 +``` + +## Disassembly + +```asm +0000: LOADI R65, 100 ; 1:5 +0001: LOADI R64, 274 ; 1:5 +0002: LOADI R67, 200 ; 1:10 +0003: LOADI R66, 306 ; 1:10 +0004: LOADI R69, 300 ; 1:17 +0005: LOADI R68, 274 ; 1:17 +0006: LOADI R71, 400 ; 1:22 +0007: LOADI R70, 258 ; 1:22 +0008: UPCALL 0, R64 ; 1:1, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=100% ; 1=200% AS 2=300% ; 3=400% +``` + +# Test: Repeated arguments, different types + +## Source + +```basic +OUT 100, "Foo" +``` + +## Disassembly + +```asm +0000: LOADI R65, 100 ; 1:5 +0001: LOADI R64, 290 ; 1:5 +0002: LOADI R67, 0 ; 1:10 +0003: LOADI R66, 259 ; 1:10 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=100% , 1=Foo$ +``` + +# Test: Singular required reference, not provided + +## Source + +```basic +INCREMENT_REQUIRED_INT +``` + +## Compilation errors + +```plain +1:1: INCREMENT_REQUIRED_INT expected arg +``` + +# Test: Singular required reference, not a variable + +## Source + +```basic +INCREMENT_REQUIRED_INT 8 +``` + +## Compilation errors + +```plain +1:24: INCREMENT_REQUIRED_INT expected arg +``` + +# Test: Singular required reference, global variable + +## Source + +```basic +DIM SHARED i +i = 8 +INCREMENT_REQUIRED_INT i +OUT i +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R0, 8 ; 2:5 +0002: LOADRP R64, INTEGER, R0 ; 3:24 +0003: UPCALL 0, R64 ; 3:1, INCREMENT_REQUIRED_INT +0004: MOVE R65, R0 ; 4:5 +0005: LOADI R64, 258 ; 4:5 +0006: UPCALL 1, R64 ; 4:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=9% +``` + +# Test: Singular required reference, local variable + +## Source + +```basic +i = 8 +INCREMENT_REQUIRED_INT i +OUT i +``` + +## Disassembly + +```asm +0000: LOADI R64, 8 ; 1:5 +0001: LOADRP R65, INTEGER, R64 ; 2:24 +0002: UPCALL 0, R65 ; 2:1, INCREMENT_REQUIRED_INT +0003: MOVE R66, R64 ; 3:5 +0004: LOADI R65, 258 ; 3:5 +0005: UPCALL 1, R65 ; 3:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=9% +``` + +# Test: Singular required reference, variable not defined + +## Source + +```basic +INCREMENT_REQUIRED_INT i +OUT i +``` + +## Compilation errors + +```plain +1:24: Undefined symbol i +``` + +# Test: Singular required reference, define output variable with default type + +## Source + +```basic +DEFINE_ARG i +OUT i +i = 1 +DEFINE_ARG i +OUT i +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:12 +0001: LOADRP R65, INTEGER, R64 ; 1:12 +0002: UPCALL 0, R65 ; 1:1, DEFINE_ARG +0003: MOVE R66, R64 ; 2:5 +0004: LOADI R65, 258 ; 2:5 +0005: UPCALL 1, R65 ; 2:1, OUT +0006: LOADI R64, 1 ; 3:5 +0007: LOADRP R65, INTEGER, R64 ; 4:12 +0008: UPCALL 0, R65 ; 4:1, DEFINE_ARG +0009: MOVE R66, R64 ; 5:5 +0010: LOADI R65, 258 ; 5:5 +0011: UPCALL 1, R65 ; 5:1, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +0=1% +``` + +# Test: Singular required reference, define output variable with explicit type + +## Source + +```basic +DEFINE_ARG t$ +OUT t +t = "Foo" +DEFINE_ARG t +OUT t +``` + +## Disassembly + +```asm +0000: ALLOC R64, STRING ; 1:12 +0001: LOADRP R65, STRING, R64 ; 1:12 +0002: UPCALL 0, R65 ; 1:1, DEFINE_ARG +0003: MOVE R66, R64 ; 2:5 +0004: LOADI R65, 259 ; 2:5 +0005: UPCALL 1, R65 ; 2:1, OUT +0006: LOADI R64, 0 ; 3:5 +0007: LOADRP R65, STRING, R64 ; 4:12 +0008: UPCALL 0, R65 ; 4:1, DEFINE_ARG +0009: MOVE R66, R64 ; 5:5 +0010: LOADI R65, 259 ; 5:5 +0011: UPCALL 1, R65 ; 5:1, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=$ +0=Foo$ +``` + +# Test: Repeated references, define output variables + +## Source + +```basic +DEFINE_AND_CHANGE_ARGS b?, d#, i%, s$ +OUT b, d, i, s + +DEFINE_AND_CHANGE_ARGS b, d, i, s +OUT b, d, i, s +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:24 +0001: LOADI R65, 0 ; 1:28 +0002: LOADI R66, 0 ; 1:32 +0003: ALLOC R67, STRING ; 1:36 +0004: LOADRP R69, BOOLEAN, R64 ; 1:24 +0005: LOADI R68, 544 ; 1:24 +0006: LOADRP R71, DOUBLE, R65 ; 1:28 +0007: LOADI R70, 544 ; 1:28 +0008: LOADRP R73, INTEGER, R66 ; 1:32 +0009: LOADI R72, 544 ; 1:32 +0010: LOADRP R75, STRING, R67 ; 1:36 +0011: LOADI R74, 512 ; 1:36 +0012: UPCALL 0, R68 ; 1:1, DEFINE_AND_CHANGE_ARGS +0013: MOVE R69, R64 ; 2:5 +0014: LOADI R68, 288 ; 2:5 +0015: MOVE R71, R65 ; 2:8 +0016: LOADI R70, 289 ; 2:8 +0017: MOVE R73, R66 ; 2:11 +0018: LOADI R72, 290 ; 2:11 +0019: MOVE R75, R67 ; 2:14 +0020: LOADI R74, 259 ; 2:14 +0021: UPCALL 1, R68 ; 2:1, OUT +0022: LOADRP R69, BOOLEAN, R64 ; 4:24 +0023: LOADI R68, 544 ; 4:24 +0024: LOADRP R71, DOUBLE, R65 ; 4:27 +0025: LOADI R70, 544 ; 4:27 +0026: LOADRP R73, INTEGER, R66 ; 4:30 +0027: LOADI R72, 544 ; 4:30 +0028: LOADRP R75, STRING, R67 ; 4:33 +0029: LOADI R74, 512 ; 4:33 +0030: UPCALL 0, R68 ; 4:1, DEFINE_AND_CHANGE_ARGS +0031: MOVE R69, R64 ; 5:5 +0032: LOADI R68, 288 ; 5:5 +0033: MOVE R71, R65 ; 5:8 +0034: LOADI R70, 289 ; 5:8 +0035: MOVE R73, R66 ; 5:11 +0036: LOADI R72, 290 ; 5:11 +0037: MOVE R75, R67 ; 5:14 +0038: LOADI R74, 259 ; 5:14 +0039: UPCALL 1, R68 ; 5:1, OUT +0040: EOF ; 0:0 +``` + +## Output + +```plain +0=true? , 1=0.6# , 2=1% , 3=.$ +0=false? , 1=1.2# , 2=2% , 3=..$ +``` + +# Test: Singular required reference, wrong type annotation + +## Source + +```basic +i$ = "hello" +INCREMENT_REQUIRED_INT i% +``` + +## Compilation errors + +```plain +2:24: Incompatible type annotation in i% reference +``` + +# Test: Singular argument of any type, wrong type annotation + +## Source + +```basic +d# = 1.0 +OUT_ANY_VALUE d? +``` + +## Compilation errors + +```plain +2:15: Incompatible type annotation in d? reference +``` + +# Test: Singular argument of any type, not provided + +## Source + +```basic +OUT_ANY_VALUE +``` + +## Compilation errors + +```plain +1:1: OUT_ANY_VALUE expected arg +``` + +# Test: Repeated arguments with require_one, none provided + +## Source + +```basic +DEFINE_AND_CHANGE_ARGS +``` + +## Compilation errors + +```plain +1:1: DEFINE_AND_CHANGE_ARGS expected arg1[ <,|;> .. <,|;> argN] +``` + +# Test: Repeated references with require_one, value instead of ref + +## Source + +```basic +DEFINE_AND_CHANGE_ARGS 5 +``` + +## Compilation errors + +```plain +1:24: DEFINE_AND_CHANGE_ARGS expected arg1[ <,|;> .. <,|;> argN] +``` + +# Test: Repeated references with require_one, invalid first separator + +## Source + +```basic +DEFINE_AND_CHANGE_ARGS b AS d +``` + +## Compilation errors + +```plain +1:26: DEFINE_AND_CHANGE_ARGS expected arg1[ <,|;> .. <,|;> argN] +``` + +# Test: Repeated references with require_one, invalid later separator + +## Source + +```basic +DEFINE_AND_CHANGE_ARGS b, d AS i +``` + +## Compilation errors + +```plain +1:29: DEFINE_AND_CHANGE_ARGS expected arg1[ <,|;> .. <,|;> argN] +``` + +# Test: Repeated references with require_one, single argument + +## Source + +```basic +b? = TRUE +DEFINE_AND_CHANGE_ARGS b +OUT b +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:6 +0001: LOADRP R66, BOOLEAN, R64 ; 2:24 +0002: LOADI R65, 512 ; 2:24 +0003: UPCALL 0, R65 ; 2:1, DEFINE_AND_CHANGE_ARGS +0004: MOVE R66, R64 ; 3:5 +0005: LOADI R65, 256 ; 3:5 +0006: UPCALL 1, R65 ; 3:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` diff --git a/core2/tests/test_arithmetic_add.md b/core2/tests/test_arithmetic_add.md new file mode 100644 index 00000000..b1f748e8 --- /dev/null +++ b/core2/tests/test_arithmetic_add.md @@ -0,0 +1,194 @@ +# Test: Two immediate doubles + +## Source + +```basic +OUT 4.5 + 2.3 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: ADDD R65, R65, R66 ; 1:9 +0003: LOADI R64, 257 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=6.8# +``` + +# Test: Two immediate integers + +## Source + +```basic +OUT 2 + 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADI R66, 3 ; 1:9 +0002: ADDI R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=5% +``` + +# Test: Concatenation of two immediate strings + +## Source + +```basic +OUT "a" + "b" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:11 +0002: CONCAT R65, R65, R66 ; 1:9 +0003: LOADI R64, 259 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=ab$ +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 + 8.3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: ADDD R65, R65, R66 ; 1:7 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=10.3# +``` + +# Test: Right integer operand needs type promotion to double + +## Source + +```basic +OUT 8.3 + 2 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADI R66, 2 ; 1:11 +0002: ITOD R66 ; 1:11 +0003: ADDD R65, R65, R66 ; 1:9 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=10.3# +``` + +# Test: Integer overflow + +## Source + +```basic +a = 2147483640 + 20 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:5 +0001: LOADI R65, 20 ; 1:18 +0002: ADDI R64, R64, R65 ; 1:16 +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:16: Integer overflow +``` + +# Test: Array subscripts in addition chain + +## Source + +```basic +DIM a(3) AS INTEGER +a(0) = 10 +a(1) = 20 +a(2) = 30 +OUT a(0) + a(1) + a(2) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R65, 10 ; 2:8 +0003: LOADI R66, 0 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADI R65, 20 ; 3:8 +0006: LOADI R66, 1 ; 3:3 +0007: STOREA R64, R65, R66 ; 3:1 +0008: LOADI R65, 30 ; 4:8 +0009: LOADI R66, 2 ; 4:3 +0010: STOREA R64, R65, R66 ; 4:1 +0011: LOADI R67, 0 ; 5:7 +0012: LOADA R66, R64, R67 ; 5:5 +0013: LOADI R68, 1 ; 5:14 +0014: LOADA R67, R64, R68 ; 5:12 +0015: ADDI R66, R66, R67 ; 5:10 +0016: LOADI R68, 2 ; 5:21 +0017: LOADA R67, R64, R68 ; 5:19 +0018: ADDI R66, R66, R67 ; 5:17 +0019: LOADI R65, 258 ; 5:5 +0020: UPCALL 0, R65 ; 5:1, OUT +0021: EOF ; 0:0 +``` + +## Output + +```plain +0=60% +``` diff --git a/core2/tests/test_arithmetic_div.md b/core2/tests/test_arithmetic_div.md new file mode 100644 index 00000000..dd0168ab --- /dev/null +++ b/core2/tests/test_arithmetic_div.md @@ -0,0 +1,151 @@ +# Test: Two immediate doubles + +## Source + +```basic +OUT 9.0 / 4.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: DIVD R65, R65, R66 ; 1:9 +0003: LOADI R64, 257 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=2.25# +``` + +# Test: Two immediate integers + +## Source + +```basic +OUT 10 / 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 10 ; 1:5 +0001: LOADI R66, 3 ; 1:10 +0002: DIVI R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 3 / 1.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: DIVD R65, R65, R66 ; 1:7 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=2# +``` + +# Test: Right integer operand needs type promotion to double + +## Source + +```basic +OUT 9.0 / 3 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADI R66, 3 ; 1:11 +0002: ITOD R66 ; 1:11 +0003: DIVD R65, R65, R66 ; 1:9 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=3# +``` + +# Test: Integer overflow + +## Source + +```basic +a = (-2147483647 - 1) / -1 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:7 +0001: NEGI R64 ; 1:6 +0002: LOADI R65, 1 ; 1:20 +0003: SUBI R64, R64, R65 ; 1:18 +0004: LOADI R65, 1 ; 1:26 +0005: NEGI R65 ; 1:25 +0006: DIVI R64, R64, R65 ; 1:23 +0007: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:23: Integer underflow +``` + +# Test: Division by zero + +## Source + +```basic +a = 5 / 0 +``` + +## Disassembly + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: LOADI R65, 0 ; 1:9 +0002: DIVI R64, R64, R65 ; 1:7 +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Division by zero +``` diff --git a/core2/tests/test_arithmetic_mod.md b/core2/tests/test_arithmetic_mod.md new file mode 100644 index 00000000..4865a739 --- /dev/null +++ b/core2/tests/test_arithmetic_mod.md @@ -0,0 +1,151 @@ +# Test: Two immediate doubles + +## Source + +```basic +OUT 10.0 MOD 3.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:14 +0002: MODD R65, R65, R66 ; 1:10 +0003: LOADI R64, 257 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=1# +``` + +# Test: Two immediate integers + +## Source + +```basic +OUT 10 MOD 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 10 ; 1:5 +0001: LOADI R66, 3 ; 1:12 +0002: MODI R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 3 MOD 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:5 +0001: LOADC R66, 0 ; 1:11 +0002: ITOD R65 ; 1:7 +0003: MODD R65, R65, R66 ; 1:7 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=0.5# +``` + +# Test: Right integer operand needs type promotion to double + +## Source + +```basic +OUT 10.5 MOD 3 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADI R66, 3 ; 1:14 +0002: ITOD R66 ; 1:14 +0003: MODD R65, R65, R66 ; 1:10 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=1.5# +``` + +# Test: Integer overflow + +## Source + +```basic +a = (-2147483647 - 1) MOD -1 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:7 +0001: NEGI R64 ; 1:6 +0002: LOADI R65, 1 ; 1:20 +0003: SUBI R64, R64, R65 ; 1:18 +0004: LOADI R65, 1 ; 1:28 +0005: NEGI R65 ; 1:27 +0006: MODI R64, R64, R65 ; 1:23 +0007: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:23: Integer underflow +``` + +# Test: Modulo by zero + +## Source + +```basic +a = 5 MOD 0 +``` + +## Disassembly + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: LOADI R65, 0 ; 1:11 +0002: MODI R64, R64, R65 ; 1:7 +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Modulo by zero +``` diff --git a/core2/tests/test_arithmetic_mul.md b/core2/tests/test_arithmetic_mul.md new file mode 100644 index 00000000..93797fb4 --- /dev/null +++ b/core2/tests/test_arithmetic_mul.md @@ -0,0 +1,124 @@ +# Test: Two immediate doubles + +## Source + +```basic +OUT 4.0 * 2.5 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: MULD R65, R65, R66 ; 1:9 +0003: LOADI R64, 257 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=10# +``` + +# Test: Two immediate integers + +## Source + +```basic +OUT 6 * 7 +``` + +## Disassembly + +```asm +0000: LOADI R65, 6 ; 1:5 +0001: LOADI R66, 7 ; 1:9 +0002: MULI R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=42% +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 3 * 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: MULD R65, R65, R66 ; 1:7 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=7.5# +``` + +# Test: Right integer operand needs type promotion to double + +## Source + +```basic +OUT 2.5 * 3 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADI R66, 3 ; 1:11 +0002: ITOD R66 ; 1:11 +0003: MULD R65, R65, R66 ; 1:9 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=7.5# +``` + +# Test: Integer overflow + +## Source + +```basic +a = 2147483640 * 10 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:5 +0001: LOADI R65, 10 ; 1:18 +0002: MULI R64, R64, R65 ; 1:16 +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:16: Integer overflow +``` diff --git a/core2/tests/test_arithmetic_neg.md b/core2/tests/test_arithmetic_neg.md new file mode 100644 index 00000000..32fc333a --- /dev/null +++ b/core2/tests/test_arithmetic_neg.md @@ -0,0 +1,107 @@ +# Test: Immediate double + +## Source + +```basic +OUT -3.5 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:6 +0001: NEGD R65 ; 1:5 +0002: LOADI R64, 257 ; 1:5 +0003: UPCALL 0, R64 ; 1:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=-3.5# +``` + +# Test: Immediate integer + +## Source + +```basic +OUT -7 +``` + +## Disassembly + +```asm +0000: LOADI R65, 7 ; 1:6 +0001: NEGI R65 ; 1:5 +0002: LOADI R64, 258 ; 1:5 +0003: UPCALL 0, R64 ; 1:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=-7% +``` + +# Test: Zero + +## Source + +```basic +OUT -0 +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:6 +0001: NEGI R65 ; 1:5 +0002: LOADI R64, 258 ; 1:5 +0003: UPCALL 0, R64 ; 1:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +``` + +# Test: Non-numeric type + +## Source + +```basic +OUT -"hello" +``` + +## Compilation errors + +```plain +1:5: STRING is not a number +``` + +# Test: Integer overflow + +## Source + +```basic +a = -(&x80000000) +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:7 +0001: NEGI R64 ; 1:5 +0002: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:5: Integer overflow +``` diff --git a/core2/tests/test_arithmetic_pow.md b/core2/tests/test_arithmetic_pow.md new file mode 100644 index 00000000..f88e4adc --- /dev/null +++ b/core2/tests/test_arithmetic_pow.md @@ -0,0 +1,148 @@ +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.0 ^ 3.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: POWD R65, R65, R66 ; 1:9 +0003: LOADI R64, 257 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=8# +``` + +# Test: Two immediate integers + +## Source + +```basic +OUT 2 ^ 8 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADI R66, 8 ; 1:9 +0002: POWI R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=256% +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 4 ^ 0.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 4 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: POWD R65, R65, R66 ; 1:7 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=2# +``` + +# Test: Right integer operand needs type promotion to double + +## Source + +```basic +OUT 2.5 ^ 3 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADI R66, 3 ; 1:11 +0002: ITOD R66 ; 1:11 +0003: POWD R65, R65, R66 ; 1:9 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=15.625# +``` + +# Test: Integer overflow + +## Source + +```basic +a = 46341 ^ 2 +``` + +## Disassembly + +```asm +0000: LOADI R64, 46341 ; 1:5 +0001: LOADI R65, 2 ; 1:13 +0002: POWI R64, R64, R65 ; 1:11 +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:11: Integer overflow +``` + +# Test: Negative exponent + +## Source + +```basic +a = 2 ^ -1 +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: LOADI R65, 1 ; 1:10 +0002: NEGI R65 ; 1:9 +0003: POWI R64, R64, R65 ; 1:7 +0004: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Exponent -1 cannot be negative +``` diff --git a/core2/tests/test_arithmetic_sub.md b/core2/tests/test_arithmetic_sub.md new file mode 100644 index 00000000..a0b51e5d --- /dev/null +++ b/core2/tests/test_arithmetic_sub.md @@ -0,0 +1,125 @@ +# Test: Two immediate doubles + +## Source + +```basic +OUT 5.0 - 3.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: SUBD R65, R65, R66 ; 1:9 +0003: LOADI R64, 257 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=2# +``` + +# Test: Two immediate integers + +## Source + +```basic +OUT 10 - 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 10 ; 1:5 +0001: LOADI R66, 3 ; 1:10 +0002: SUBI R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=7% +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 - 8.3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: SUBD R65, R65, R66 ; 1:7 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=-6.300000000000001# +``` + +# Test: Right integer operand needs type promotion to double + +## Source + +```basic +OUT 8.3 - 2 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADI R66, 2 ; 1:11 +0002: ITOD R66 ; 1:11 +0003: SUBD R65, R65, R66 ; 1:9 +0004: LOADI R64, 257 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=6.300000000000001# +``` + +# Test: Integer overflow + +## Source + +```basic +a = -2147483640 - 20 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:6 +0001: NEGI R64 ; 1:5 +0002: LOADI R65, 20 ; 1:19 +0003: SUBI R64, R64, R65 ; 1:17 +0004: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:17: Integer underflow +``` diff --git a/core2/tests/test_arrays.md b/core2/tests/test_arrays.md new file mode 100644 index 00000000..d74ef48a --- /dev/null +++ b/core2/tests/test_arrays.md @@ -0,0 +1,896 @@ +# Test: 1D integer array + +## Source + +```basic +DIM a(3) AS INTEGER +a(0) = 10 +a(1) = 20 +a(2) = 30 +OUT a(0), a(1), a(2) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R65, 10 ; 2:8 +0003: LOADI R66, 0 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADI R65, 20 ; 3:8 +0006: LOADI R66, 1 ; 3:3 +0007: STOREA R64, R65, R66 ; 3:1 +0008: LOADI R65, 30 ; 4:8 +0009: LOADI R66, 2 ; 4:3 +0010: STOREA R64, R65, R66 ; 4:1 +0011: LOADI R67, 0 ; 5:7 +0012: LOADA R66, R64, R67 ; 5:5 +0013: LOADI R65, 290 ; 5:5 +0014: LOADI R69, 1 ; 5:13 +0015: LOADA R68, R64, R69 ; 5:11 +0016: LOADI R67, 290 ; 5:11 +0017: LOADI R71, 2 ; 5:19 +0018: LOADA R70, R64, R71 ; 5:17 +0019: LOADI R69, 258 ; 5:17 +0020: UPCALL 0, R65 ; 5:1, OUT +0021: EOF ; 0:0 +``` + +## Output + +```plain +0=10% , 1=20% , 2=30% +``` + +# Test: 2D integer array + +## Source + +```basic +DIM m(2, 3) AS INTEGER +m(0, 0) = 1 +m(0, 1) = 2 +m(0, 2) = 3 +m(1, 0) = 4 +m(1, 1) = 5 +m(1, 2) = 6 +OUT m(0, 0), m(0, 2), m(1, 1), m(1, 2) +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:7 +0001: LOADI R66, 3 ; 1:10 +0002: ALLOCA R64, [2]%, R65 ; 1:5 +0003: LOADI R65, 1 ; 2:11 +0004: LOADI R66, 0 ; 2:3 +0005: LOADI R67, 0 ; 2:6 +0006: STOREA R64, R65, R66 ; 2:1 +0007: LOADI R65, 2 ; 3:11 +0008: LOADI R66, 0 ; 3:3 +0009: LOADI R67, 1 ; 3:6 +0010: STOREA R64, R65, R66 ; 3:1 +0011: LOADI R65, 3 ; 4:11 +0012: LOADI R66, 0 ; 4:3 +0013: LOADI R67, 2 ; 4:6 +0014: STOREA R64, R65, R66 ; 4:1 +0015: LOADI R65, 4 ; 5:11 +0016: LOADI R66, 1 ; 5:3 +0017: LOADI R67, 0 ; 5:6 +0018: STOREA R64, R65, R66 ; 5:1 +0019: LOADI R65, 5 ; 6:11 +0020: LOADI R66, 1 ; 6:3 +0021: LOADI R67, 1 ; 6:6 +0022: STOREA R64, R65, R66 ; 6:1 +0023: LOADI R65, 6 ; 7:11 +0024: LOADI R66, 1 ; 7:3 +0025: LOADI R67, 2 ; 7:6 +0026: STOREA R64, R65, R66 ; 7:1 +0027: LOADI R67, 0 ; 8:7 +0028: LOADI R68, 0 ; 8:10 +0029: LOADA R66, R64, R67 ; 8:5 +0030: LOADI R65, 290 ; 8:5 +0031: LOADI R69, 0 ; 8:16 +0032: LOADI R70, 2 ; 8:19 +0033: LOADA R68, R64, R69 ; 8:14 +0034: LOADI R67, 290 ; 8:14 +0035: LOADI R71, 1 ; 8:25 +0036: LOADI R72, 1 ; 8:28 +0037: LOADA R70, R64, R71 ; 8:23 +0038: LOADI R69, 290 ; 8:23 +0039: LOADI R73, 1 ; 8:34 +0040: LOADI R74, 2 ; 8:37 +0041: LOADA R72, R64, R73 ; 8:32 +0042: LOADI R71, 258 ; 8:32 +0043: UPCALL 0, R65 ; 8:1, OUT +0044: EOF ; 0:0 +``` + +## Output + +```plain +0=1% , 1=3% , 2=5% , 3=6% +``` + +# Test: Boolean array + +## Source + +```basic +DIM flags(2) AS BOOLEAN +flags(0) = TRUE +OUT flags(0), flags(1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:11 +0001: ALLOCA R64, [1]?, R65 ; 1:5 +0002: LOADI R65, 1 ; 2:12 +0003: LOADI R66, 0 ; 2:7 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADI R67, 0 ; 3:11 +0006: LOADA R66, R64, R67 ; 3:5 +0007: LOADI R65, 288 ; 3:5 +0008: LOADI R69, 1 ; 3:21 +0009: LOADA R68, R64, R69 ; 3:15 +0010: LOADI R67, 256 ; 3:15 +0011: UPCALL 0, R65 ; 3:1, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=true? , 1=false? +``` + +# Test: Double array + +## Source + +```basic +DIM d(2) AS DOUBLE +d(0) = 3.14 +OUT d(0), d(1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:7 +0001: ALLOCA R64, [1]#, R65 ; 1:5 +0002: LOADC R65, 0 ; 2:8 +0003: LOADI R66, 0 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADI R67, 0 ; 3:7 +0006: LOADA R66, R64, R67 ; 3:5 +0007: LOADI R65, 289 ; 3:5 +0008: LOADI R69, 1 ; 3:13 +0009: LOADA R68, R64, R69 ; 3:11 +0010: LOADI R67, 257 ; 3:11 +0011: UPCALL 0, R65 ; 3:1, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=3.14# , 1=0# +``` + +# Test: String array + +## Source + +```basic +DIM s(3) AS STRING +s(0) = "hello" +s(1) = "world" +OUT s(0), s(1), s(2) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]$, R65 ; 1:5 +0002: LOADI R65, 0 ; 2:8 +0003: LOADI R66, 0 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADI R65, 1 ; 3:8 +0006: LOADI R66, 1 ; 3:3 +0007: STOREA R64, R65, R66 ; 3:1 +0008: LOADI R67, 0 ; 4:7 +0009: LOADA R66, R64, R67 ; 4:5 +0010: LOADI R65, 291 ; 4:5 +0011: LOADI R69, 1 ; 4:13 +0012: LOADA R68, R64, R69 ; 4:11 +0013: LOADI R67, 291 ; 4:11 +0014: LOADI R71, 2 ; 4:19 +0015: LOADA R70, R64, R71 ; 4:17 +0016: LOADI R69, 259 ; 4:17 +0017: UPCALL 0, R65 ; 4:1, OUT +0018: EOF ; 0:0 +``` + +## Output + +```plain +0=hello$ , 1=world$ , 2=$ +``` + +# Test: DIM SHARED array + +## Source + +```basic +DIM SHARED a(2) AS INTEGER + +SUB fill_array + a(0) = 100 + a(1) = 200 +END SUB + +fill_array +OUT a(0), a(1) +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:14 +0001: ALLOCA R0, [1]%, R64 ; 1:12 +0002: JUMP 10 ; 3:5 + +;; FILL_ARRAY (BEGIN) +0003: LOADI R64, 100 ; 4:12 +0004: LOADI R65, 0 ; 4:7 +0005: STOREA R0, R64, R65 ; 4:5 +0006: LOADI R64, 200 ; 5:12 +0007: LOADI R65, 1 ; 5:7 +0008: STOREA R0, R64, R65 ; 5:5 +0009: RETURN ; 6:1 +;; FILL_ARRAY (END) + +0010: CALL R64, 3 ; 8:1, FILL_ARRAY +0011: LOADI R66, 0 ; 9:7 +0012: LOADA R65, R0, R66 ; 9:5 +0013: LOADI R64, 290 ; 9:5 +0014: LOADI R68, 1 ; 9:13 +0015: LOADA R67, R0, R68 ; 9:11 +0016: LOADI R66, 258 ; 9:11 +0017: UPCALL 0, R64 ; 9:1, OUT +0018: EOF ; 0:0 +``` + +## Output + +```plain +0=100% , 1=200% +``` + +# Test: Array reference with matching annotation + +## Source + +```basic +DIM a(3) AS INTEGER +OUT a%(1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R67, 1 ; 2:8 +0003: LOADA R66, R64, R67 ; 2:5 +0004: LOADI R65, 258 ; 2:5 +0005: UPCALL 0, R65 ; 2:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +``` + +# Test: Array reference with bad annotation + +## Source + +```basic +DIM a(3) AS INTEGER +OUT a#(1) +``` + +## Compilation errors + +```plain +2:5: Incompatible type annotation in a# reference +``` + +# Test: Array reference index is double and needs demotion + +## Source + +```basic +DIM a(4) AS INTEGER +a(2) = 99 +OUT a(1.9) +``` + +## Disassembly + +```asm +0000: LOADI R65, 4 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R65, 99 ; 2:8 +0003: LOADI R66, 2 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADC R67, 0 ; 3:7 +0006: DTOI R67 ; 3:7 +0007: LOADA R66, R64, R67 ; 3:5 +0008: LOADI R65, 258 ; 3:5 +0009: UPCALL 0, R65 ; 3:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=99% +``` + +# Test: Array reference index has bad type + +## Source + +```basic +DIM a(3) AS INTEGER +OUT a(FALSE) +``` + +## Compilation errors + +```plain +2:7: BOOLEAN is not a number +``` + +# Test: Array reference has wrong number of dimensions + +## Source + +```basic +DIM a(2, 3) AS INTEGER +OUT a(1) +``` + +## Compilation errors + +```plain +2:5: Array requires 2 subscripts but got 1 +``` + +# Test: Undefined symbol in array-style expression + +## Source + +```basic +OUT foo(1) +``` + +## Compilation errors + +```plain +1:5: Undefined symbol foo +``` + +# Test: Scalar used as array-style expression + +## Source + +```basic +a = 3 +OUT a(1) +``` + +## Compilation errors + +```plain +2:5: Undefined symbol a +``` + +# Test: Array dimension too large + +## Source + +```basic +DIM a(1000000000000000) +``` + +## Compilation errors + +```plain +1:7: Bad integer 1000000000000000: number too large to fit in target type +``` + +# Test: Array dimension is zero + +## Source + +```basic +DIM a(1, 0, 1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:7 +0001: LOADI R66, 0 ; 1:10 +0002: LOADI R67, 1 ; 1:13 +0003: ALLOCA R64, [3]%, R65 ; 1:5 +0004: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:5: Dimension 1 must be positive +``` + +# Test: Array dimension is negative + +## Source + +```basic +DIM a(1, -5, 1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:7 +0001: LOADI R66, 5 ; 1:11 +0002: NEGI R66 ; 1:10 +0003: LOADI R67, 1 ; 1:14 +0004: ALLOCA R64, [3]%, R65 ; 1:5 +0005: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:5: Dimension 1 must be positive +``` + +# Test: Array bounds error subscript too large + +## Source + +```basic +DIM a(3) AS INTEGER +a(5) = 10 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R65, 10 ; 2:8 +0003: LOADI R66, 5 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: EOF ; 0:0 +``` + +## Runtime errors + +```plain +2:1: Subscript 5 exceeds limit of 3 +``` + +# Test: Array index is negative + +## Source + +```basic +DIM a(3) AS INTEGER +a(-5) = 10 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R65, 10 ; 2:9 +0003: LOADI R66, 5 ; 2:4 +0004: NEGI R66 ; 2:3 +0005: STOREA R64, R65, R66 ; 2:1 +0006: EOF ; 0:0 +``` + +## Runtime errors + +```plain +2:1: Subscript -5 cannot be negative +``` + +# Test: Array bounds error subscript at limit + +## Source + +```basic +DIM a(3) AS INTEGER +OUT a(3) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R67, 3 ; 2:7 +0003: LOADA R66, R64, R67 ; 2:5 +0004: LOADI R65, 258 ; 2:5 +0005: UPCALL 0, R65 ; 2:1, OUT +0006: EOF ; 0:0 +``` + +## Runtime errors + +```plain +2:5: Subscript 3 exceeds limit of 3 +``` + +# Test: Multidimensional array bounds error + +## Source + +```basic +DIM a(5, 100) AS INTEGER +a(10, 50) = 123 +``` + +## Disassembly + +```asm +0000: LOADI R65, 5 ; 1:7 +0001: LOADI R66, 100 ; 1:10 +0002: ALLOCA R64, [2]%, R65 ; 1:5 +0003: LOADI R65, 123 ; 2:13 +0004: LOADI R66, 10 ; 2:3 +0005: LOADI R67, 50 ; 2:7 +0006: STOREA R64, R65, R66 ; 2:1 +0007: EOF ; 0:0 +``` + +## Runtime errors + +```plain +2:1: Subscript 10 exceeds limit of 5 +``` + +# Test: Default values + +## Source + +```basic +DIM a(3) AS INTEGER +DIM b(2) AS BOOLEAN +DIM d(2) AS DOUBLE +DIM s(2) AS STRING +OUT a(0), a(1), a(2) +OUT b(0), b(1) +OUT d(0), d(1) +OUT s(0), s(1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R66, 2 ; 2:7 +0003: ALLOCA R65, [1]?, R66 ; 2:5 +0004: LOADI R67, 2 ; 3:7 +0005: ALLOCA R66, [1]#, R67 ; 3:5 +0006: LOADI R68, 2 ; 4:7 +0007: ALLOCA R67, [1]$, R68 ; 4:5 +0008: LOADI R70, 0 ; 5:7 +0009: LOADA R69, R64, R70 ; 5:5 +0010: LOADI R68, 290 ; 5:5 +0011: LOADI R72, 1 ; 5:13 +0012: LOADA R71, R64, R72 ; 5:11 +0013: LOADI R70, 290 ; 5:11 +0014: LOADI R74, 2 ; 5:19 +0015: LOADA R73, R64, R74 ; 5:17 +0016: LOADI R72, 258 ; 5:17 +0017: UPCALL 0, R68 ; 5:1, OUT +0018: LOADI R70, 0 ; 6:7 +0019: LOADA R69, R65, R70 ; 6:5 +0020: LOADI R68, 288 ; 6:5 +0021: LOADI R72, 1 ; 6:13 +0022: LOADA R71, R65, R72 ; 6:11 +0023: LOADI R70, 256 ; 6:11 +0024: UPCALL 0, R68 ; 6:1, OUT +0025: LOADI R70, 0 ; 7:7 +0026: LOADA R69, R66, R70 ; 7:5 +0027: LOADI R68, 289 ; 7:5 +0028: LOADI R72, 1 ; 7:13 +0029: LOADA R71, R66, R72 ; 7:11 +0030: LOADI R70, 257 ; 7:11 +0031: UPCALL 0, R68 ; 7:1, OUT +0032: LOADI R70, 0 ; 8:7 +0033: LOADA R69, R67, R70 ; 8:5 +0034: LOADI R68, 291 ; 8:5 +0035: LOADI R72, 1 ; 8:13 +0036: LOADA R71, R67, R72 ; 8:11 +0037: LOADI R70, 259 ; 8:11 +0038: UPCALL 0, R68 ; 8:1, OUT +0039: EOF ; 0:0 +``` + +## Output + +```plain +0=0% , 1=0% , 2=0% +0=false? , 1=false? +0=0# , 1=0# +0=$ , 1=$ +``` + +# Test: Multiple arrays in same scope + +## Source + +```basic +DIM x(2) AS INTEGER +DIM y(2) AS INTEGER +x(0) = 1 +y(0) = 2 +OUT x(0), y(0) +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R66, 2 ; 2:7 +0003: ALLOCA R65, [1]%, R66 ; 2:5 +0004: LOADI R66, 1 ; 3:8 +0005: LOADI R67, 0 ; 3:3 +0006: STOREA R64, R66, R67 ; 3:1 +0007: LOADI R66, 2 ; 4:8 +0008: LOADI R67, 0 ; 4:3 +0009: STOREA R65, R66, R67 ; 4:1 +0010: LOADI R68, 0 ; 5:7 +0011: LOADA R67, R64, R68 ; 5:5 +0012: LOADI R66, 290 ; 5:5 +0013: LOADI R70, 0 ; 5:13 +0014: LOADA R69, R65, R70 ; 5:11 +0015: LOADI R68, 258 ; 5:11 +0016: UPCALL 0, R66 ; 5:1, OUT +0017: EOF ; 0:0 +``` + +## Output + +```plain +0=1% , 1=2% +``` + +# Test: Array inside a function + +## Source + +```basic +FUNCTION sum%(n%) + DIM a(3) AS INTEGER + a(0) = 10 + a(1) = 20 + a(2) = 30 + sum = a(0) + a(1) + a(2) +END FUNCTION + +OUT sum(0) +``` + +## Disassembly + +```asm +0000: JUMP 22 ; 1:10 + +;; SUM (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R67, 3 ; 2:11 +0003: ALLOCA R66, [1]%, R67 ; 2:9 +0004: LOADI R67, 10 ; 3:12 +0005: LOADI R68, 0 ; 3:7 +0006: STOREA R66, R67, R68 ; 3:5 +0007: LOADI R67, 20 ; 4:12 +0008: LOADI R68, 1 ; 4:7 +0009: STOREA R66, R67, R68 ; 4:5 +0010: LOADI R67, 30 ; 5:12 +0011: LOADI R68, 2 ; 5:7 +0012: STOREA R66, R67, R68 ; 5:5 +0013: LOADI R67, 0 ; 6:13 +0014: LOADA R64, R66, R67 ; 6:11 +0015: LOADI R68, 1 ; 6:20 +0016: LOADA R67, R66, R68 ; 6:18 +0017: ADDI R64, R64, R67 ; 6:16 +0018: LOADI R68, 2 ; 6:27 +0019: LOADA R67, R66, R68 ; 6:25 +0020: ADDI R64, R64, R67 ; 6:23 +0021: RETURN ; 7:1 +;; SUM (END) + +0022: LOADI R67, 0 ; 9:9 +0023: CALL R66, 1 ; 9:5, SUM +0024: MOVE R65, R66 ; 9:5 +0025: LOADI R64, 258 ; 9:5 +0026: UPCALL 0, R64 ; 9:1, OUT +0027: EOF ; 0:0 +``` + +## Output + +```plain +0=60% +``` + +# Test: Array used as scalar in expression + +## Source + +```basic +DIM a(3) AS INTEGER +OUT a +``` + +## Compilation errors + +```plain +2:5: a is an array and requires subscripts +``` + +# Test: Array used as scalar in assignment + +## Source + +```basic +DIM a(3) AS INTEGER +a = 5 +``` + +## Compilation errors + +```plain +2:1: a is an array and requires subscripts +``` + +# Test: Too many dimensions exceeding bytecode packing + +## Source + +```basic +DIM good(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15) +DIM bad(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16) +``` + +## Compilation errors + +```plain +2:5: Array cannot have 16 dimensions +``` + +# Test: Too many dimensions exceeding potential u8 integer + +## Source + +```basic +DIM bad(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260) +``` + +## Compilation errors + +```plain +1:5: Out of temp registers +``` + +# Test: DIM of name of a built-in callable + +## Source + +```basic +DIM out(3) AS INTEGER +``` + +## Compilation errors + +```plain +1:5: Cannot redefine out +``` + +# Test: DIM of name of a user-defined sub + +## Source + +```basic +SUB foo +END SUB +DIM foo(3) AS INTEGER +``` + +## Compilation errors + +```plain +3:5: Cannot redefine foo +``` + +# Test: Redefine existing array with DIM + +## Source + +```basic +DIM a(3) AS INTEGER +DIM a(3) AS INTEGER +``` + +## Compilation errors + +```plain +2:5: Cannot redefine a +``` + +# Test: Redefine existing variable as array with DIM + +## Source + +```basic +a = 5 +DIM a(3) AS INTEGER +``` + +## Compilation errors + +```plain +2:5: Cannot redefine a +``` + +# Test: Redefine existing shared array with DIM SHARED + +## Source + +```basic +DIM SHARED a(3) AS INTEGER +DIM SHARED a(3) AS INTEGER +``` + +## Compilation errors + +```plain +2:12: Cannot redefine a +``` + +# Test: Redefine existing array as scalar with DIM + +## Source + +```basic +DIM a(3) AS INTEGER +DIM a AS INTEGER +``` + +## Compilation errors + +```plain +2:5: Cannot redefine a +``` diff --git a/core2/tests/test_assignments.md b/core2/tests/test_assignments.md new file mode 100644 index 00000000..dcbdcd1b --- /dev/null +++ b/core2/tests/test_assignments.md @@ -0,0 +1,246 @@ +# Test: Repeated assignment + +## Source + +```basic +a = 1 +a = 2 + +OUT a +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:5 +0001: LOADI R64, 2 ; 2:5 +0002: MOVE R66, R64 ; 4:5 +0003: LOADI R65, 258 ; 4:5 +0004: UPCALL 0, R65 ; 4:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=2% +``` + +# Test: First assignment has annotation, second infers it + +## Source + +```basic +a$ = "foo" +OUT a + +a = "bar" +OUT a +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:6 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 259 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: LOADI R64, 1 ; 4:5 +0005: MOVE R66, R64 ; 5:5 +0006: LOADI R65, 259 ; 5:5 +0007: UPCALL 0, R65 ; 5:1, OUT +0008: EOF ; 0:0 +``` + +## Output + +```plain +0=foo$ +0=bar$ +``` + +# Test: First assignment infers type, second has annotation + +## Source + +```basic +a = "foo" +OUT a + +a$ = "bar" +OUT a +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 259 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: LOADI R64, 1 ; 4:6 +0005: MOVE R66, R64 ; 5:5 +0006: LOADI R65, 259 ; 5:5 +0007: UPCALL 0, R65 ; 5:1, OUT +0008: EOF ; 0:0 +``` + +## Output + +```plain +0=foo$ +0=bar$ +``` + +# Test: Annotation mismatch after assignment + +## Source + +```basic +a# = 4.5 +a$ = "foo" +``` + +## Compilation errors + +```plain +2:1: Incompatible type annotation in a$ reference +``` + +# Test: Value type does not match annotation on first assignment + +## Source + +```basic +d$ = 3.4 +``` + +## Compilation errors + +```plain +1:6: Cannot assign value of type DOUBLE to variable of type STRING +``` + +# Test: Value type does not match target type after first definition + +## Source + +```basic +a = 4.5 +a = "foo" +``` + +## Compilation errors + +```plain +2:5: STRING is not a number +``` + +# Test: Integer to double promotion + +## Source + +```basic +d# = 6 +OUT d +``` + +## Disassembly + +```asm +0000: LOADI R64, 6 ; 1:6 +0001: ITOD R64 ; 1:6 +0002: MOVE R66, R64 ; 2:5 +0003: LOADI R65, 257 ; 2:5 +0004: UPCALL 0, R65 ; 2:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=6# +``` + +# Test: Double to integer demotion + +## Source + +```basic +i1 = 0 +i1 = 3.2 + +i2 = 0 +i2 = 3.7 + +OUT i1, i2 +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:6 +0001: LOADC R64, 0 ; 2:6 +0002: DTOI R64 ; 2:6 +0003: LOADI R65, 0 ; 4:6 +0004: LOADC R65, 1 ; 5:6 +0005: DTOI R65 ; 5:6 +0006: MOVE R67, R64 ; 7:5 +0007: LOADI R66, 290 ; 7:5 +0008: MOVE R69, R65 ; 7:9 +0009: LOADI R68, 258 ; 7:9 +0010: UPCALL 0, R66 ; 7:1, OUT +0011: EOF ; 0:0 +``` + +## Output + +```plain +0=3% , 1=4% +``` + +# Test: Assignment to name of a built-in callable + +## Source + +```basic +out = 5 +``` + +## Compilation errors + +```plain +1:1: Cannot redefine out +``` + +# Test: Assignment to name of a user-defined sub + +## Source + +```basic +SUB foo +END SUB +foo = 5 +``` + +## Compilation errors + +```plain +3:1: Cannot redefine foo +``` + +# Test: Assignment to name of a user-defined function + +## Source + +```basic +FUNCTION bar% +END FUNCTION +bar = 5 +``` + +## Compilation errors + +```plain +3:1: Cannot redefine bar +``` diff --git a/core2/tests/test_bitwise_and.md b/core2/tests/test_bitwise_and.md new file mode 100644 index 00000000..9421ea48 --- /dev/null +++ b/core2/tests/test_bitwise_and.md @@ -0,0 +1,84 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 12 AND 10 +``` + +## Disassembly + +```asm +0000: LOADI R65, 12 ; 1:5 +0001: LOADI R66, 10 ; 1:12 +0002: AND R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=8% +``` + +# Test: Type error with double + +## Source + +```basic +OUT 1.0 AND 2.0 +``` + +## Compilation errors + +```plain +1:9: Cannot AND DOUBLE and DOUBLE +``` + +# Test: Type error with string + +## Source + +```basic +OUT "a" AND "b" +``` + +## Compilation errors + +```plain +1:9: Cannot AND STRING and STRING +``` + +# Test: Two immediate booleans + +## Source + +```basic +OUT TRUE AND FALSE +OUT TRUE AND TRUE +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 0 ; 1:14 +0002: AND R65, R65, R66 ; 1:10 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: LOADI R65, 1 ; 2:5 +0006: LOADI R66, 1 ; 2:14 +0007: AND R65, R65, R66 ; 2:10 +0008: LOADI R64, 256 ; 2:5 +0009: UPCALL 0, R64 ; 2:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +0=true? +``` diff --git a/core2/tests/test_bitwise_not.md b/core2/tests/test_bitwise_not.md new file mode 100644 index 00000000..1f090043 --- /dev/null +++ b/core2/tests/test_bitwise_not.md @@ -0,0 +1,83 @@ +# Test: Immediate integer + +## Source + +```basic +OUT NOT 12 +``` + +## Disassembly + +```asm +0000: LOADI R65, 12 ; 1:9 +0001: NOT R65 ; 1:5 +0002: LOADI R64, 258 ; 1:5 +0003: UPCALL 0, R64 ; 1:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=-13% +``` + +# Test: Type error with double + +## Source + +```basic +OUT NOT 1.0 +``` + +## Compilation errors + +```plain +1:5: Expected INTEGER but found DOUBLE +``` + +# Test: Type error with string + +## Source + +```basic +OUT NOT "a" +``` + +## Compilation errors + +```plain +1:5: Expected INTEGER but found STRING +``` + +# Test: Immediate boolean + +## Source + +```basic +OUT NOT TRUE +OUT NOT FALSE +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:9 +0001: LOADI R66, 1 ; 1:5 +0002: XOR R65, R65, R66 ; 1:5 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: LOADI R65, 0 ; 2:9 +0006: LOADI R66, 1 ; 2:5 +0007: XOR R65, R65, R66 ; 2:5 +0008: LOADI R64, 256 ; 2:5 +0009: UPCALL 0, R64 ; 2:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +0=true? +``` diff --git a/core2/tests/test_bitwise_or.md b/core2/tests/test_bitwise_or.md new file mode 100644 index 00000000..76265bef --- /dev/null +++ b/core2/tests/test_bitwise_or.md @@ -0,0 +1,84 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 12 OR 10 +``` + +## Disassembly + +```asm +0000: LOADI R65, 12 ; 1:5 +0001: LOADI R66, 10 ; 1:11 +0002: OR R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=14% +``` + +# Test: Type error with double + +## Source + +```basic +OUT 1.0 OR 2.0 +``` + +## Compilation errors + +```plain +1:9: Cannot OR DOUBLE and DOUBLE +``` + +# Test: Type error with string + +## Source + +```basic +OUT "a" OR "b" +``` + +## Compilation errors + +```plain +1:9: Cannot OR STRING and STRING +``` + +# Test: Two immediate booleans + +## Source + +```basic +OUT TRUE OR FALSE +OUT FALSE OR FALSE +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 0 ; 1:13 +0002: OR R65, R65, R66 ; 1:10 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: LOADI R65, 0 ; 2:5 +0006: LOADI R66, 0 ; 2:14 +0007: OR R65, R65, R66 ; 2:11 +0008: LOADI R64, 256 ; 2:5 +0009: UPCALL 0, R64 ; 2:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +0=false? +``` diff --git a/core2/tests/test_bitwise_shl.md b/core2/tests/test_bitwise_shl.md new file mode 100644 index 00000000..bea77a52 --- /dev/null +++ b/core2/tests/test_bitwise_shl.md @@ -0,0 +1,114 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 3 << 2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:5 +0001: LOADI R66, 2 ; 1:10 +0002: SHL R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=12% +``` + +# Test: Shift by zero + +## Source + +```basic +OUT 7 << 0 +``` + +## Disassembly + +```asm +0000: LOADI R65, 7 ; 1:5 +0001: LOADI R66, 0 ; 1:10 +0002: SHL R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=7% +``` + +# Test: Shift amount larger than 31 + +## Source + +```basic +OUT 1 << 32 +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 32 ; 1:10 +0002: SHL R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +``` + +# Test: Type error with double + +## Source + +```basic +OUT 1.0 << 2 +``` + +## Compilation errors + +```plain +1:9: Cannot << DOUBLE and INTEGER +``` + +# Test: Negative shift amount + +## Source + +```basic +OUT 1 << -1 +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 1 ; 1:11 +0002: NEGI R66 ; 1:10 +0003: SHL R65, R65, R66 ; 1:7 +0004: LOADI R64, 258 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Number of bits to << (-1) must be positive +``` diff --git a/core2/tests/test_bitwise_shr.md b/core2/tests/test_bitwise_shr.md new file mode 100644 index 00000000..e2ddb632 --- /dev/null +++ b/core2/tests/test_bitwise_shr.md @@ -0,0 +1,166 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 12 >> 2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 12 ; 1:5 +0001: LOADI R66, 2 ; 1:11 +0002: SHR R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +``` + +# Test: Shift by zero + +## Source + +```basic +OUT 7 >> 0 +``` + +## Disassembly + +```asm +0000: LOADI R65, 7 ; 1:5 +0001: LOADI R66, 0 ; 1:10 +0002: SHR R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=7% +``` + +# Test: Shift amount larger than 31 (positive value) + +## Source + +```basic +OUT 1 >> 32 +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 32 ; 1:10 +0002: SHR R65, R65, R66 ; 1:7 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +``` + +# Test: Shift amount larger than 31 (negative value) + +## Source + +```basic +OUT -1 >> 32 +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:6 +0001: NEGI R65 ; 1:5 +0002: LOADI R66, 32 ; 1:11 +0003: SHR R65, R65, R66 ; 1:8 +0004: LOADI R64, 258 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=-1% +``` + +# Test: Arithmetic right shift (sign extension) + +## Source + +```basic +OUT -8 >> 2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 8 ; 1:6 +0001: NEGI R65 ; 1:5 +0002: LOADI R66, 2 ; 1:11 +0003: SHR R65, R65, R66 ; 1:8 +0004: LOADI R64, 258 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=-2% +``` + +# Test: Type error with double + +## Source + +```basic +OUT 1.0 >> 2 +``` + +## Compilation errors + +```plain +1:9: Cannot >> DOUBLE and INTEGER +``` + +# Test: Negative shift amount + +## Source + +```basic +OUT 1 >> -1 +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 1 ; 1:11 +0002: NEGI R66 ; 1:10 +0003: SHR R65, R65, R66 ; 1:7 +0004: LOADI R64, 258 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Number of bits to >> (-1) must be positive +``` diff --git a/core2/tests/test_bitwise_xor.md b/core2/tests/test_bitwise_xor.md new file mode 100644 index 00000000..77143a81 --- /dev/null +++ b/core2/tests/test_bitwise_xor.md @@ -0,0 +1,84 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 12 XOR 10 +``` + +## Disassembly + +```asm +0000: LOADI R65, 12 ; 1:5 +0001: LOADI R66, 10 ; 1:12 +0002: XOR R65, R65, R66 ; 1:8 +0003: LOADI R64, 258 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=6% +``` + +# Test: Type error with double + +## Source + +```basic +OUT 1.0 XOR 2.0 +``` + +## Compilation errors + +```plain +1:9: Cannot XOR DOUBLE and DOUBLE +``` + +# Test: Type error with string + +## Source + +```basic +OUT "a" XOR "b" +``` + +## Compilation errors + +```plain +1:9: Cannot XOR STRING and STRING +``` + +# Test: Two immediate booleans + +## Source + +```basic +OUT TRUE XOR FALSE +OUT TRUE XOR TRUE +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 0 ; 1:14 +0002: XOR R65, R65, R66 ; 1:10 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: LOADI R65, 1 ; 2:5 +0006: LOADI R66, 1 ; 2:14 +0007: XOR R65, R65, R66 ; 2:10 +0008: LOADI R64, 256 ; 2:5 +0009: UPCALL 0, R64 ; 2:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +0=false? +``` diff --git a/core2/tests/test_call_errors.md b/core2/tests/test_call_errors.md new file mode 100644 index 00000000..58b129ae --- /dev/null +++ b/core2/tests/test_call_errors.md @@ -0,0 +1,264 @@ +# Test: Command syntax error from single arg + +## Source + +```basic +RAISE "syntax" +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:7 +0001: UPCALL 0, R64 ; 1:1, RAISE +0002: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Some syntax error +``` + +# Test: Command syntax error pointing at first arg + +## Source + +```basic +RAISE "syntax0", 5 +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:7 +0001: LOADI R65, 5 ; 1:18 +0002: UPCALL 0, R64 ; 1:1, RAISE +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:7: Some syntax error +``` + +# Test: Command syntax error pointing at second arg + +## Source + +```basic +RAISE "syntax1", 5 +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:7 +0001: LOADI R65, 5 ; 1:18 +0002: UPCALL 0, R64 ; 1:1, RAISE +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:18: Some syntax error +``` + +# Test: Command syntax error at second arg with ON ERROR RESUME NEXT + +## Source + +```basic +ON ERROR RESUME NEXT: RAISE "syntax1", 5: OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R64, 0 ; 1:29 +0002: LOADI R65, 5 ; 1:40 +0003: UPCALL 0, R64 ; 1:23, RAISE +0004: UPCALL 1, R65 ; 1:47, LAST_ERROR +0005: LOADI R64, 259 ; 1:47 +0006: UPCALL 2, R64 ; 1:43, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=1:40: Some syntax error$ +``` + +# Test: Command syntax error at first arg with ON ERROR RESUME NEXT + +## Source + +```basic +ON ERROR RESUME NEXT: RAISE "syntax0", 5: OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R64, 0 ; 1:29 +0002: LOADI R65, 5 ; 1:40 +0003: UPCALL 0, R64 ; 1:23, RAISE +0004: UPCALL 1, R65 ; 1:47, LAST_ERROR +0005: LOADI R64, 259 ; 1:47 +0006: UPCALL 2, R64 ; 1:43, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=1:29: Some syntax error$ +``` + +# Test: Command syntax error with ON ERROR GOTO + +## Source + +```basic +ON ERROR GOTO @handler +RAISE "syntax" +OUT 1 +@handler +OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH JUMP, 6 ; 1:1 +0001: LOADI R64, 0 ; 2:7 +0002: UPCALL 0, R64 ; 2:1, RAISE +0003: LOADI R65, 1 ; 3:5 +0004: LOADI R64, 258 ; 3:5 +0005: UPCALL 1, R64 ; 3:1, OUT +0006: UPCALL 2, R65 ; 5:5, LAST_ERROR +0007: LOADI R64, 259 ; 5:5 +0008: UPCALL 1, R64 ; 5:1, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=2:7: Some syntax error$ +``` + +# Test: Function syntax error from single arg + +## Source + +```basic +OUT RAISEF("syntax") +``` + +## Disassembly + +```asm +0000: LOADI R67, 0 ; 1:12 +0001: UPCALL 0, R66 ; 1:5, RAISEF +0002: MOVE R65, R66 ; 1:5 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 1, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:12: Some syntax error +``` + +# Test: Function syntax error pointing at second arg + +## Source + +```basic +OUT RAISEF("syntax1", 5) +``` + +## Disassembly + +```asm +0000: LOADI R67, 0 ; 1:12 +0001: LOADI R68, 5 ; 1:23 +0002: UPCALL 0, R66 ; 1:5, RAISEF +0003: MOVE R65, R66 ; 1:5 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 1, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:23: Some syntax error +``` + +# Test: Function syntax error with ON ERROR RESUME NEXT + +## Source + +```basic +ON ERROR RESUME NEXT: OUT RAISEF("syntax"): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R67, 0 ; 1:34 +0002: UPCALL 0, R66 ; 1:27, RAISEF +0003: MOVE R65, R66 ; 1:27 +0004: LOADI R64, 256 ; 1:27 +0005: UPCALL 1, R64 ; 1:23, OUT +0006: UPCALL 2, R65 ; 1:49, LAST_ERROR +0007: LOADI R64, 259 ; 1:49 +0008: UPCALL 1, R64 ; 1:45, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1:34: Some syntax error$ +``` + +# Test: Function syntax error at second arg with ON ERROR RESUME NEXT + +## Source + +```basic +ON ERROR RESUME NEXT: OUT RAISEF("syntax1", 5): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R67, 0 ; 1:34 +0002: LOADI R68, 5 ; 1:45 +0003: UPCALL 0, R66 ; 1:27, RAISEF +0004: MOVE R65, R66 ; 1:27 +0005: LOADI R64, 256 ; 1:27 +0006: UPCALL 1, R64 ; 1:23, OUT +0007: UPCALL 2, R65 ; 1:53, LAST_ERROR +0008: LOADI R64, 259 ; 1:53 +0009: UPCALL 1, R64 ; 1:49, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=1:45: Some syntax error$ +``` diff --git a/core2/tests/test_case_insensitivity.md b/core2/tests/test_case_insensitivity.md new file mode 100644 index 00000000..a903c910 --- /dev/null +++ b/core2/tests/test_case_insensitivity.md @@ -0,0 +1,299 @@ +# Test: Variable names are case insensitive + +## Source + +```basic +A = 1 +OUT a +a = 2 +OUT A +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:5 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 258 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: LOADI R64, 2 ; 3:5 +0005: MOVE R66, R64 ; 4:5 +0006: LOADI R65, 258 ; 4:5 +0007: UPCALL 0, R65 ; 4:1, OUT +0008: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=2% +``` + +# Test: Array names are case insensitive + +## Source + +```basic +DIM A(3) +a(0) = 10 +A(1) = 20 +OUT A(0), a(1) +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:7 +0001: ALLOCA R64, [1]%, R65 ; 1:5 +0002: LOADI R65, 10 ; 2:8 +0003: LOADI R66, 0 ; 2:3 +0004: STOREA R64, R65, R66 ; 2:1 +0005: LOADI R65, 20 ; 3:8 +0006: LOADI R66, 1 ; 3:3 +0007: STOREA R64, R65, R66 ; 3:1 +0008: LOADI R67, 0 ; 4:7 +0009: LOADA R66, R64, R67 ; 4:5 +0010: LOADI R65, 290 ; 4:5 +0011: LOADI R69, 1 ; 4:13 +0012: LOADA R68, R64, R69 ; 4:11 +0013: LOADI R67, 258 ; 4:11 +0014: UPCALL 0, R65 ; 4:1, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=10% , 1=20% +``` + +# Test: DIM conflicts with existing variable of different case + +## Source + +```basic +a = 5 +DIM A +``` + +## Compilation errors + +```plain +2:5: Cannot redefine A +``` + +# Test: DIM SHARED conflicts with existing global of different case + +## Source + +```basic +DIM SHARED a +DIM SHARED A +``` + +## Compilation errors + +```plain +2:12: Cannot redefine A +``` + +# Test: Global variable name is case insensitive + +## Source + +```basic +DIM SHARED A +A = 1 +a = 2 +OUT A, a +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R0, 1 ; 2:5 +0002: LOADI R0, 2 ; 3:5 +0003: MOVE R65, R0 ; 4:5 +0004: LOADI R64, 290 ; 4:5 +0005: MOVE R67, R0 ; 4:8 +0006: LOADI R66, 258 ; 4:8 +0007: UPCALL 0, R64 ; 4:1, OUT +0008: EOF ; 0:0 +``` + +## Output + +```plain +0=2% , 1=2% +``` + +# Test: Function name is case insensitive + +## Source + +```basic +FUNCTION Foo + foo = 42 +END FUNCTION + +OUT FOO +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:10 + +;; FOO (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R64, 42 ; 2:11 +0003: RETURN ; 3:1 +;; FOO (END) + +0004: CALL R65, 1 ; 5:5, FOO +0005: LOADI R64, 258 ; 5:5 +0006: UPCALL 0, R64 ; 5:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=42% +``` + +# Test: Sub name is case insensitive + +## Source + +```basic +SUB Foo + OUT "hello" +END SUB + +FOO +``` + +## Disassembly + +```asm +0000: JUMP 5 ; 1:5 + +;; FOO (BEGIN) +0001: LOADI R65, 0 ; 2:9 +0002: LOADI R64, 259 ; 2:9 +0003: UPCALL 0, R64 ; 2:5, OUT +0004: RETURN ; 3:1 +;; FOO (END) + +0005: CALL R64, 1 ; 5:1, FOO +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=hello$ +``` + +# Test: Label name is case insensitive + +## Source + +```basic +GOTO @FOO +OUT "skipped" +@foo: +OUT "done" +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:6 +0001: LOADI R65, 0 ; 2:5 +0002: LOADI R64, 259 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R65, 1 ; 4:5 +0005: LOADI R64, 259 ; 4:5 +0006: UPCALL 0, R64 ; 4:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=done$ +``` + +# Test: GOSUB target is case insensitive + +## Source + +```basic +GOSUB @FOO +END +@foo: +OUT "in gosub" +RETURN +``` + +## Disassembly + +```asm +0000: GOSUB 3 ; 1:7 +0001: LOADI R64, 0 ; 2:1 +0002: END R64 ; 2:1 +0003: LOADI R65, 0 ; 4:5 +0004: LOADI R64, 259 ; 4:5 +0005: UPCALL 0, R64 ; 4:1, OUT +0006: RETURN ; 5:1 +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=in gosub$ +``` + +# Test: Parameter names are case insensitive + +## Source + +```basic +FUNCTION foo(A) + foo = a + 1 +END FUNCTION + +OUT foo(5) +``` + +## Disassembly + +```asm +0000: JUMP 6 ; 1:10 + +;; FOO (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: MOVE R64, R65 ; 2:11 +0003: LOADI R66, 1 ; 2:15 +0004: ADDI R64, R64, R66 ; 2:13 +0005: RETURN ; 3:1 +;; FOO (END) + +0006: LOADI R67, 5 ; 5:9 +0007: CALL R66, 1 ; 5:5, FOO +0008: MOVE R65, R66 ; 5:5 +0009: LOADI R64, 258 ; 5:5 +0010: UPCALL 0, R64 ; 5:1, OUT +0011: EOF ; 0:0 +``` + +## Output + +```plain +0=6% +``` diff --git a/core2/tests/test_data.md b/core2/tests/test_data.md new file mode 100644 index 00000000..9367ba2d --- /dev/null +++ b/core2/tests/test_data.md @@ -0,0 +1,111 @@ +# Test: DATA values are collected in source order + +## Source + +```basic +DATA TRUE, 3 +DATA , "hello" +GETDATA +``` + +## Disassembly + +```asm +0000: UPCALL 0, R64 ; 3:1, GETDATA +0001: EOF ; 0:0 +``` + +## Output + +```plain +0=true? 1=3% 2=() 3=hello$ +``` + +# Test: DATA values are collected in nested statements + +## Source + +```basic +IF FALSE THEN + DATA 5 +ELSE + DATA 6 +END IF +WHILE FALSE + DATA 1 +WEND +FOR i = 0 TO 0 + DATA 0 +NEXT +GETDATA +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:4 +0001: JMPF R64, 3 ; 1:4 +0002: JUMP 5 ; 1:4 +0003: LOADI R64, 1 ; 3:1 +0004: JMPF R64, 5 ; 3:1 +0005: LOADI R64, 0 ; 6:7 +0006: JMPF R64, 8 ; 6:7 +0007: JUMP 5 ; 6:7 +0008: LOADI R64, 0 ; 9:9 +0009: MOVE R65, R64 ; 9:5 +0010: LOADI R66, 0 ; 9:14 +0011: CMPLEI R65, R65, R66 ; 9:11 +0012: JMPF R65, 17 ; 9:5 +0013: MOVE R64, R64 ; 9:5 +0014: LOADI R65, 1 ; 9:15 +0015: ADDI R64, R64, R65 ; 9:11 +0016: JUMP 9 ; 9:5 +0017: UPCALL 0, R65 ; 12:1, GETDATA +0018: EOF ; 0:0 +``` + +## Output + +```plain +0=5% 1=6% 2=1% 3=0% +``` + +# Test: GETDATA sees all DATA values even before execution + +## Source + +```basic +GETDATA +DATA 1 +DATA 2 +GETDATA +``` + +## Disassembly + +```asm +0000: UPCALL 0, R64 ; 1:1, GETDATA +0001: UPCALL 0, R64 ; 4:1, GETDATA +0002: EOF ; 0:0 +``` + +## Output + +```plain +0=1% 1=2% +0=1% 1=2% +``` + +# Test: DATA rejects non-literal values at compile time + +## Source + +```basic +DATA 5 + 1 +``` + +## Compilation errors + +```plain +1:8: Expected comma after datum but found + +``` diff --git a/core2/tests/test_do.md b/core2/tests/test_do.md new file mode 100644 index 00000000..6d1e4aeb --- /dev/null +++ b/core2/tests/test_do.md @@ -0,0 +1,839 @@ +# Test: Infinite DO with EXIT DO + +## Source + +```basic +DO + OUT "start" + EXIT DO + OUT "after" +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 2:9 +0001: LOADI R64, 259 ; 2:9 +0002: UPCALL 0, R64 ; 2:5, OUT +0003: JUMP 8 ; 3:5 +0004: LOADI R65, 1 ; 4:9 +0005: LOADI R64, 259 ; 4:9 +0006: UPCALL 0, R64 ; 4:5, OUT +0007: JUMP 0 ; 0:0 +0008: EOF ; 0:0 +``` + +## Output + +```plain +0=start$ +``` + +# Test: Pre UNTIL DO loop with zero iterations + +## Source + +```basic +n = 0 +DO UNTIL n = 0 + OUT n + n = n - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPEQI R65, R65, R66 ; 2:12 +0004: JMPF R65, 6 ; 2:10 +0005: JUMP 13 ; 2:10 +0006: MOVE R66, R64 ; 3:9 +0007: LOADI R65, 258 ; 3:9 +0008: UPCALL 0, R65 ; 3:5, OUT +0009: MOVE R64, R64 ; 4:9 +0010: LOADI R65, 1 ; 4:13 +0011: SUBI R64, R64, R65 ; 4:11 +0012: JUMP 1 ; 2:10 +0013: EOF ; 0:0 +``` + +# Test: Pre UNTIL DO loop with iterations + +## Source + +```basic +n = 3 +DO UNTIL n = 0 + OUT n + n = n - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPEQI R65, R65, R66 ; 2:12 +0004: JMPF R65, 6 ; 2:10 +0005: JUMP 13 ; 2:10 +0006: MOVE R66, R64 ; 3:9 +0007: LOADI R65, 258 ; 3:9 +0008: UPCALL 0, R65 ; 3:5, OUT +0009: MOVE R64, R64 ; 4:9 +0010: LOADI R65, 1 ; 4:13 +0011: SUBI R64, R64, R65 ; 4:11 +0012: JUMP 1 ; 2:10 +0013: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +0=2% +0=1% +``` + +# Test: Pre WHILE DO loop with zero iterations + +## Source + +```basic +n = 0 +DO WHILE n > 0 + OUT n + n = n - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 12 ; 2:10 +0005: MOVE R66, R64 ; 3:9 +0006: LOADI R65, 258 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: MOVE R64, R64 ; 4:9 +0009: LOADI R65, 1 ; 4:13 +0010: SUBI R64, R64, R65 ; 4:11 +0011: JUMP 1 ; 2:10 +0012: EOF ; 0:0 +``` + +# Test: Pre WHILE DO loop with iterations + +## Source + +```basic +n = 3 +DO WHILE n > 0 + OUT n + n = n - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 12 ; 2:10 +0005: MOVE R66, R64 ; 3:9 +0006: LOADI R65, 258 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: MOVE R64, R64 ; 4:9 +0009: LOADI R65, 1 ; 4:13 +0010: SUBI R64, R64, R65 ; 4:11 +0011: JUMP 1 ; 2:10 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +0=2% +0=1% +``` + +# Test: Post UNTIL DO loop with single iteration + +## Source + +```basic +n = 1 +DO + OUT n + n = n - 1 +LOOP UNTIL n = 0 +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:5 +0001: MOVE R66, R64 ; 3:9 +0002: LOADI R65, 258 ; 3:9 +0003: UPCALL 0, R65 ; 3:5, OUT +0004: MOVE R64, R64 ; 4:9 +0005: LOADI R65, 1 ; 4:13 +0006: SUBI R64, R64, R65 ; 4:11 +0007: MOVE R65, R64 ; 5:12 +0008: LOADI R66, 0 ; 5:16 +0009: CMPEQI R65, R65, R66 ; 5:14 +0010: JMPF R65, 1 ; 5:12 +0011: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +``` + +# Test: Post UNTIL DO loop with iterations + +## Source + +```basic +n = 3 +DO + OUT n + n = n - 1 +LOOP UNTIL n = 0 +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R66, R64 ; 3:9 +0002: LOADI R65, 258 ; 3:9 +0003: UPCALL 0, R65 ; 3:5, OUT +0004: MOVE R64, R64 ; 4:9 +0005: LOADI R65, 1 ; 4:13 +0006: SUBI R64, R64, R65 ; 4:11 +0007: MOVE R65, R64 ; 5:12 +0008: LOADI R66, 0 ; 5:16 +0009: CMPEQI R65, R65, R66 ; 5:14 +0010: JMPF R65, 1 ; 5:12 +0011: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +0=2% +0=1% +``` + +# Test: Post WHILE DO loop with single iteration + +## Source + +```basic +n = 1 +DO + OUT n + n = n - 1 +LOOP WHILE n > 0 +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:5 +0001: MOVE R66, R64 ; 3:9 +0002: LOADI R65, 258 ; 3:9 +0003: UPCALL 0, R65 ; 3:5, OUT +0004: MOVE R64, R64 ; 4:9 +0005: LOADI R65, 1 ; 4:13 +0006: SUBI R64, R64, R65 ; 4:11 +0007: MOVE R65, R64 ; 5:12 +0008: LOADI R66, 0 ; 5:16 +0009: CMPGTI R65, R65, R66 ; 5:14 +0010: JMPF R65, 12 ; 5:12 +0011: JUMP 1 ; 5:12 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +``` + +# Test: Post WHILE DO loop with iterations + +## Source + +```basic +n = 3 +DO + OUT n + n = n - 1 +LOOP WHILE n > 0 +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R66, R64 ; 3:9 +0002: LOADI R65, 258 ; 3:9 +0003: UPCALL 0, R65 ; 3:5, OUT +0004: MOVE R64, R64 ; 4:9 +0005: LOADI R65, 1 ; 4:13 +0006: SUBI R64, R64, R65 ; 4:11 +0007: MOVE R65, R64 ; 5:12 +0008: LOADI R66, 0 ; 5:16 +0009: CMPGTI R65, R65, R66 ; 5:14 +0010: JMPF R65, 12 ; 5:12 +0011: JUMP 1 ; 5:12 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +0=2% +0=1% +``` + +# Test: Nested DO loops with EXIT DO + +## Source + +```basic +i = 3 +DO WHILE i > 0 + j = 2 + DO UNTIL j = 0 + OUT i; j + IF i = 2 AND j = 2 THEN: EXIT DO: END IF + j = j - 1 + LOOP + IF i = 1 THEN: EXIT DO: END IF + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 38 ; 2:10 +0005: LOADI R65, 2 ; 3:9 +0006: MOVE R66, R65 ; 4:14 +0007: LOADI R67, 0 ; 4:18 +0008: CMPEQI R66, R66, R67 ; 4:16 +0009: JMPF R66, 11 ; 4:14 +0010: JUMP 29 ; 4:14 +0011: MOVE R67, R64 ; 5:13 +0012: LOADI R66, 274 ; 5:13 +0013: MOVE R69, R65 ; 5:16 +0014: LOADI R68, 258 ; 5:16 +0015: UPCALL 0, R66 ; 5:9, OUT +0016: MOVE R66, R64 ; 6:12 +0017: LOADI R67, 2 ; 6:16 +0018: CMPEQI R66, R66, R67 ; 6:14 +0019: MOVE R67, R65 ; 6:22 +0020: LOADI R68, 2 ; 6:26 +0021: CMPEQI R67, R67, R68 ; 6:24 +0022: AND R66, R66, R67 ; 6:18 +0023: JMPF R66, 25 ; 6:12 +0024: JUMP 29 ; 6:34 +0025: MOVE R65, R65 ; 7:13 +0026: LOADI R66, 1 ; 7:17 +0027: SUBI R65, R65, R66 ; 7:15 +0028: JUMP 6 ; 4:14 +0029: MOVE R66, R64 ; 9:8 +0030: LOADI R67, 1 ; 9:12 +0031: CMPEQI R66, R66, R67 ; 9:10 +0032: JMPF R66, 34 ; 9:8 +0033: JUMP 38 ; 9:20 +0034: MOVE R64, R64 ; 10:9 +0035: LOADI R66, 1 ; 10:13 +0036: SUBI R64, R64, R66 ; 10:11 +0037: JUMP 1 ; 2:10 +0038: EOF ; 0:0 +``` + +## Output + +```plain +0=3% ; 1=2% +0=3% ; 1=1% +0=2% ; 1=2% +0=1% ; 1=2% +0=1% ; 1=1% +``` + +# Test: Nested DO loop EXIT DO exits inner only + +## Source + +```basic +i = 2 +DO WHILE i > 0 + j = 3 + DO WHILE j > 0 + OUT i; j + EXIT DO + j = j - 1 + LOOP + OUT "after"; i + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 29 ; 2:10 +0005: LOADI R65, 3 ; 3:9 +0006: MOVE R66, R65 ; 4:14 +0007: LOADI R67, 0 ; 4:18 +0008: CMPGTI R66, R66, R67 ; 4:16 +0009: JMPF R66, 20 ; 4:14 +0010: MOVE R67, R64 ; 5:13 +0011: LOADI R66, 274 ; 5:13 +0012: MOVE R69, R65 ; 5:16 +0013: LOADI R68, 258 ; 5:16 +0014: UPCALL 0, R66 ; 5:9, OUT +0015: JUMP 20 ; 6:9 +0016: MOVE R65, R65 ; 7:13 +0017: LOADI R66, 1 ; 7:17 +0018: SUBI R65, R65, R66 ; 7:15 +0019: JUMP 6 ; 4:14 +0020: LOADI R67, 0 ; 9:9 +0021: LOADI R66, 275 ; 9:9 +0022: MOVE R69, R64 ; 9:18 +0023: LOADI R68, 258 ; 9:18 +0024: UPCALL 0, R66 ; 9:5, OUT +0025: MOVE R64, R64 ; 10:9 +0026: LOADI R66, 1 ; 10:13 +0027: SUBI R64, R64, R66 ; 10:11 +0028: JUMP 1 ; 2:10 +0029: EOF ; 0:0 +``` + +## Output + +```plain +0=2% ; 1=3% +0=after$ ; 1=2% +0=1% ; 1=3% +0=after$ ; 1=1% +``` + +# Test: Nested DO loop with multiple EXIT DO + +## Source + +```basic +i = 2 +DO WHILE i > 0 + j = 2 + DO WHILE j > 0 + IF i = 2 THEN: EXIT DO: END IF + IF j = 1 THEN: EXIT DO: END IF + j = j - 1 + LOOP + OUT i + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 31 ; 2:10 +0005: LOADI R65, 2 ; 3:9 +0006: MOVE R66, R65 ; 4:14 +0007: LOADI R67, 0 ; 4:18 +0008: CMPGTI R66, R66, R67 ; 4:16 +0009: JMPF R66, 24 ; 4:14 +0010: MOVE R66, R64 ; 5:12 +0011: LOADI R67, 2 ; 5:16 +0012: CMPEQI R66, R66, R67 ; 5:14 +0013: JMPF R66, 15 ; 5:12 +0014: JUMP 24 ; 5:24 +0015: MOVE R66, R65 ; 6:12 +0016: LOADI R67, 1 ; 6:16 +0017: CMPEQI R66, R66, R67 ; 6:14 +0018: JMPF R66, 20 ; 6:12 +0019: JUMP 24 ; 6:24 +0020: MOVE R65, R65 ; 7:13 +0021: LOADI R66, 1 ; 7:17 +0022: SUBI R65, R65, R66 ; 7:15 +0023: JUMP 6 ; 4:14 +0024: MOVE R67, R64 ; 9:9 +0025: LOADI R66, 258 ; 9:9 +0026: UPCALL 0, R66 ; 9:5, OUT +0027: MOVE R64, R64 ; 10:9 +0028: LOADI R66, 1 ; 10:13 +0029: SUBI R64, R64, R66 ; 10:11 +0030: JUMP 1 ; 2:10 +0031: EOF ; 0:0 +``` + +## Output + +```plain +0=2% +0=1% +``` + +# Test: Nested DO with inner post guard EXIT DO + +## Source + +```basic +i = 2 +DO WHILE i > 0 + j = 2 + DO + OUT i; j + EXIT DO + j = j - 1 + LOOP UNTIL j = 0 + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 23 ; 2:10 +0005: LOADI R65, 2 ; 3:9 +0006: MOVE R67, R64 ; 5:13 +0007: LOADI R66, 274 ; 5:13 +0008: MOVE R69, R65 ; 5:16 +0009: LOADI R68, 258 ; 5:16 +0010: UPCALL 0, R66 ; 5:9, OUT +0011: JUMP 19 ; 6:9 +0012: MOVE R65, R65 ; 7:13 +0013: LOADI R66, 1 ; 7:17 +0014: SUBI R65, R65, R66 ; 7:15 +0015: MOVE R66, R65 ; 8:16 +0016: LOADI R67, 0 ; 8:20 +0017: CMPEQI R66, R66, R67 ; 8:18 +0018: JMPF R66, 6 ; 8:16 +0019: MOVE R64, R64 ; 9:9 +0020: LOADI R66, 1 ; 9:13 +0021: SUBI R64, R64, R66 ; 9:11 +0022: JUMP 1 ; 2:10 +0023: EOF ; 0:0 +``` + +## Output + +```plain +0=2% ; 1=2% +0=1% ; 1=2% +``` + +# Test: Nested DO with inner infinite EXIT DO + +## Source + +```basic +i = 2 +DO WHILE i > 0 + j = 1 + DO + OUT i; j + EXIT DO + LOOP + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 17 ; 2:10 +0005: LOADI R65, 1 ; 3:9 +0006: MOVE R67, R64 ; 5:13 +0007: LOADI R66, 274 ; 5:13 +0008: MOVE R69, R65 ; 5:16 +0009: LOADI R68, 258 ; 5:16 +0010: UPCALL 0, R66 ; 5:9, OUT +0011: JUMP 13 ; 6:9 +0012: JUMP 6 ; 0:0 +0013: MOVE R64, R64 ; 8:9 +0014: LOADI R66, 1 ; 8:13 +0015: SUBI R64, R64, R66 ; 8:11 +0016: JUMP 1 ; 2:10 +0017: EOF ; 0:0 +``` + +## Output + +```plain +0=2% ; 1=1% +0=1% ; 1=1% +``` + +# Test: Nested DO with single-line EXIT DO + +## Source + +```basic +i = 2 +DO WHILE i > 0 + j = 2 + DO WHILE j > 0: OUT i; j: EXIT DO: j = j - 1: LOOP + OUT "after"; i + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 29 ; 2:10 +0005: LOADI R65, 2 ; 3:9 +0006: MOVE R66, R65 ; 4:14 +0007: LOADI R67, 0 ; 4:18 +0008: CMPGTI R66, R66, R67 ; 4:16 +0009: JMPF R66, 20 ; 4:14 +0010: MOVE R67, R64 ; 4:25 +0011: LOADI R66, 274 ; 4:25 +0012: MOVE R69, R65 ; 4:28 +0013: LOADI R68, 258 ; 4:28 +0014: UPCALL 0, R66 ; 4:21, OUT +0015: JUMP 20 ; 4:31 +0016: MOVE R65, R65 ; 4:44 +0017: LOADI R66, 1 ; 4:48 +0018: SUBI R65, R65, R66 ; 4:46 +0019: JUMP 6 ; 4:14 +0020: LOADI R67, 0 ; 5:9 +0021: LOADI R66, 275 ; 5:9 +0022: MOVE R69, R64 ; 5:18 +0023: LOADI R68, 258 ; 5:18 +0024: UPCALL 0, R66 ; 5:5, OUT +0025: MOVE R64, R64 ; 6:9 +0026: LOADI R66, 1 ; 6:13 +0027: SUBI R64, R64, R66 ; 6:11 +0028: JUMP 1 ; 2:10 +0029: EOF ; 0:0 +``` + +## Output + +```plain +0=2% ; 1=2% +0=after$ ; 1=2% +0=1% ; 1=2% +0=after$ ; 1=1% +``` + +# Test: Sequential DO loops with EXIT DO + +## Source + +```basic +i = 2 +DO WHILE i > 0 + OUT "First"; i + i = i - 1 +LOOP + +i = 2 +DO WHILE i > 0 + OUT "Second"; i + i = i - 1 +LOOP +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 14 ; 2:10 +0005: LOADI R66, 0 ; 3:9 +0006: LOADI R65, 275 ; 3:9 +0007: MOVE R68, R64 ; 3:18 +0008: LOADI R67, 258 ; 3:18 +0009: UPCALL 0, R65 ; 3:5, OUT +0010: MOVE R64, R64 ; 4:9 +0011: LOADI R65, 1 ; 4:13 +0012: SUBI R64, R64, R65 ; 4:11 +0013: JUMP 1 ; 2:10 +0014: LOADI R64, 2 ; 7:5 +0015: MOVE R65, R64 ; 8:10 +0016: LOADI R66, 0 ; 8:14 +0017: CMPGTI R65, R65, R66 ; 8:12 +0018: JMPF R65, 28 ; 8:10 +0019: LOADI R66, 1 ; 9:9 +0020: LOADI R65, 275 ; 9:9 +0021: MOVE R68, R64 ; 9:19 +0022: LOADI R67, 258 ; 9:19 +0023: UPCALL 0, R65 ; 9:5, OUT +0024: MOVE R64, R64 ; 10:9 +0025: LOADI R65, 1 ; 10:13 +0026: SUBI R64, R64, R65 ; 10:11 +0027: JUMP 15 ; 8:10 +0028: EOF ; 0:0 +``` + +## Output + +```plain +0=First$ ; 1=2% +0=First$ ; 1=1% +0=Second$ ; 1=2% +0=Second$ ; 1=1% +``` + +# Test: EXIT DO from nested subroutine DO loop + +## Source + +```basic +i = 3 +DO WHILE i > 0 + GOSUB @another + IF i = 1 THEN: EXIT DO: END IF + i = i - 1 +LOOP +GOTO @end +@another +j = 2 +DO UNTIL j = 0 + OUT i; j + IF i = 2 AND j = 2 THEN: EXIT DO: END IF + j = j - 1 +LOOP +RETURN +@end +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 15 ; 2:10 +0005: GOSUB 16 ; 3:11 +0006: MOVE R65, R64 ; 4:8 +0007: LOADI R66, 1 ; 4:12 +0008: CMPEQI R65, R65, R66 ; 4:10 +0009: JMPF R65, 11 ; 4:8 +0010: JUMP 15 ; 4:20 +0011: MOVE R64, R64 ; 5:9 +0012: LOADI R65, 1 ; 5:13 +0013: SUBI R64, R64, R65 ; 5:11 +0014: JUMP 1 ; 2:10 +0015: JUMP 41 ; 7:6 +0016: LOADI R65, 2 ; 9:5 +0017: MOVE R66, R65 ; 10:10 +0018: LOADI R67, 0 ; 10:14 +0019: CMPEQI R66, R66, R67 ; 10:12 +0020: JMPF R66, 22 ; 10:10 +0021: JUMP 40 ; 10:10 +0022: MOVE R67, R64 ; 11:9 +0023: LOADI R66, 274 ; 11:9 +0024: MOVE R69, R65 ; 11:12 +0025: LOADI R68, 258 ; 11:12 +0026: UPCALL 0, R66 ; 11:5, OUT +0027: MOVE R66, R64 ; 12:8 +0028: LOADI R67, 2 ; 12:12 +0029: CMPEQI R66, R66, R67 ; 12:10 +0030: MOVE R67, R65 ; 12:18 +0031: LOADI R68, 2 ; 12:22 +0032: CMPEQI R67, R67, R68 ; 12:20 +0033: AND R66, R66, R67 ; 12:14 +0034: JMPF R66, 36 ; 12:8 +0035: JUMP 40 ; 12:30 +0036: MOVE R65, R65 ; 13:9 +0037: LOADI R66, 1 ; 13:13 +0038: SUBI R65, R65, R66 ; 13:11 +0039: JUMP 17 ; 10:10 +0040: RETURN ; 15:1 +0041: EOF ; 0:0 +``` + +## Output + +```plain +0=3% ; 1=2% +0=3% ; 1=1% +0=2% ; 1=2% +0=1% ; 1=2% +0=1% ; 1=1% +``` + +# Test: DO guard must be boolean + +## Source + +```basic +DO WHILE 2 + OUT 1 +LOOP +``` + +## Compilation errors + +```plain +1:10: Expected BOOLEAN but found INTEGER +``` + +# Test: EXIT DO outside of DO + +## Source + +```basic +EXIT DO +``` + +## Compilation errors + +```plain +1:1: EXIT DO outside of DO +``` diff --git a/core2/tests/test_empty.md b/core2/tests/test_empty.md new file mode 100644 index 00000000..22e1ffec --- /dev/null +++ b/core2/tests/test_empty.md @@ -0,0 +1,12 @@ +# Test: Nothing to do + +## Source + +```basic +``` + +## Disassembly + +```asm +0000: EOF ; 0:0 +``` diff --git a/core2/tests/test_end.md b/core2/tests/test_end.md new file mode 100644 index 00000000..96fcf112 --- /dev/null +++ b/core2/tests/test_end.md @@ -0,0 +1,238 @@ +# Test: Call to END and nothing else + +## Source + +```basic +END +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:1 +0001: END R64 ; 1:1 +0002: EOF ; 0:0 +``` + +# Test: Exit code is an integer immediate + +## Source + +```basic +END 42 +``` + +## Disassembly + +```asm +0000: LOADI R64, 42 ; 1:5 +0001: END R64 ; 1:1 +0002: EOF ; 0:0 +``` + +## Exit code + +```plain +42 +``` + +# Test: Exit code is a double immediate and needs demotion + +## Source + +```basic +END 43.98 +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:5 +0001: DTOI R64 ; 1:5 +0002: END R64 ; 1:1 +0003: EOF ; 0:0 +``` + +## Exit code + +```plain +44 +``` + +# Test: Exit code is in a global variable + +## Source + +```basic +DIM SHARED i +i = 5 +END i +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R0, 5 ; 2:5 +0002: MOVE R64, R0 ; 3:5 +0003: END R64 ; 3:1 +0004: EOF ; 0:0 +``` + +## Exit code + +```plain +5 +``` + +# Test: Exit code is in a local variable + +## Source + +```basic +i = 3 +END i +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:5 +0002: END R65 ; 2:1 +0003: EOF ; 0:0 +``` + +## Exit code + +```plain +3 +``` + +# Test: Exit code is of an invalid type + +## Source + +```basic +END "foo" +``` + +## Compilation errors + +```plain +1:5: STRING is not a number +``` + +# Test: Exit code cannot be negative + +## Source + +```basic +END -3 +``` + +## Compilation errors + +```plain +1:5: Exit code must be in the 0..127 range +``` + +# Test: Exit code cannot be larger than 127 + +## Source + +```basic +END 128 +``` + +## Compilation errors + +```plain +1:5: Exit code must be in the 0..127 range +``` + +# Test: Dynamic exit code cannot be negative + +## Source + +```basic +i = -3 +END i +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:6 +0001: NEGI R64 ; 1:5 +0002: MOVE R65, R64 ; 2:5 +0003: END R65 ; 2:1 +0004: EOF ; 0:0 +``` + +## Runtime errors + +```plain +2:1: Exit code must be in the 0..127 range +``` + +# Test: Dynamic exit code cannot be larger than 127 + +## Source + +```basic +i = 128 +END i +``` + +## Disassembly + +```asm +0000: LOADI R64, 128 ; 1:5 +0001: MOVE R65, R64 ; 2:5 +0002: END R65 ; 2:1 +0003: EOF ; 0:0 +``` + +## Runtime errors + +```plain +2:1: Exit code must be in the 0..127 range +``` + +# Test: END exits from inside FOR loop + +## Source + +```basic +FOR i = 1 TO 10 + IF i = 3 THEN END 42 +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 10 ; 1:14 +0003: CMPLEI R65, R65, R66 ; 1:11 +0004: JMPF R65, 15 ; 1:5 +0005: MOVE R65, R64 ; 2:8 +0006: LOADI R66, 3 ; 2:12 +0007: CMPEQI R65, R65, R66 ; 2:10 +0008: JMPF R65, 11 ; 2:8 +0009: LOADI R65, 42 ; 2:23 +0010: END R65 ; 2:19 +0011: MOVE R64, R64 ; 1:5 +0012: LOADI R65, 1 ; 1:16 +0013: ADDI R64, R64, R65 ; 1:11 +0014: JUMP 1 ; 1:5 +0015: EOF ; 0:0 +``` + +## Exit code + +```plain +42 +``` diff --git a/core2/tests/test_for.md b/core2/tests/test_for.md new file mode 100644 index 00000000..a4cd9e9a --- /dev/null +++ b/core2/tests/test_for.md @@ -0,0 +1,566 @@ +# Test: Basic FOR incrementing loop + +## Source + +```basic +FOR a = 0 TO 3 + OUT a +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 3 ; 1:14 +0003: CMPLEI R65, R65, R66 ; 1:11 +0004: JMPF R65, 12 ; 1:5 +0005: MOVE R66, R64 ; 2:9 +0006: LOADI R65, 258 ; 2:9 +0007: UPCALL 0, R65 ; 2:5, OUT +0008: MOVE R64, R64 ; 1:5 +0009: LOADI R65, 1 ; 1:15 +0010: ADDI R64, R64, R65 ; 1:11 +0011: JUMP 1 ; 1:5 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +0=1% +0=2% +0=3% +``` + +# Test: FOR incrementing loop with STEP + +## Source + +```basic +FOR a = 0 TO 10 STEP 3 + OUT a +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 10 ; 1:14 +0003: CMPLEI R65, R65, R66 ; 1:11 +0004: JMPF R65, 12 ; 1:5 +0005: MOVE R66, R64 ; 2:9 +0006: LOADI R65, 258 ; 2:9 +0007: UPCALL 0, R65 ; 2:5, OUT +0008: MOVE R64, R64 ; 1:5 +0009: LOADI R65, 3 ; 1:22 +0010: ADDI R64, R64, R65 ; 1:11 +0011: JUMP 1 ; 1:5 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +0=3% +0=6% +0=9% +``` + +# Test: FOR decrementing loop with negative STEP + +## Source + +```basic +FOR a = 10 TO 1 STEP -2 + OUT a +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 10 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 1 ; 1:15 +0003: CMPGEI R65, R65, R66 ; 1:12 +0004: JMPF R65, 12 ; 1:5 +0005: MOVE R66, R64 ; 2:9 +0006: LOADI R65, 258 ; 2:9 +0007: UPCALL 0, R65 ; 2:5, OUT +0008: MOVE R64, R64 ; 1:5 +0009: LOADC R65, 0 ; 1:23 +0010: ADDI R64, R64, R65 ; 1:12 +0011: JUMP 1 ; 1:5 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=10% +0=8% +0=6% +0=4% +0=2% +``` + +# Test: FOR loop can have zero iterations + +## Source + +```basic +FOR i = 10 TO 9 + OUT i +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 10 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 9 ; 1:15 +0003: CMPLEI R65, R65, R66 ; 1:12 +0004: JMPF R65, 12 ; 1:5 +0005: MOVE R66, R64 ; 2:9 +0006: LOADI R65, 258 ; 2:9 +0007: UPCALL 0, R65 ; 2:5, OUT +0008: MOVE R64, R64 ; 1:5 +0009: LOADI R65, 1 ; 1:16 +0010: ADDI R64, R64, R65 ; 1:12 +0011: JUMP 1 ; 1:5 +0012: EOF ; 0:0 +``` + +# Test: FOR loop with invalid direction has zero iterations + +## Source + +```basic +FOR i = 9 TO 10 STEP -1 + OUT i +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 9 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 10 ; 1:14 +0003: CMPGEI R65, R65, R66 ; 1:11 +0004: JMPF R65, 12 ; 1:5 +0005: MOVE R66, R64 ; 2:9 +0006: LOADI R65, 258 ; 2:9 +0007: UPCALL 0, R65 ; 2:5, OUT +0008: MOVE R64, R64 ; 1:5 +0009: LOADC R65, 0 ; 1:23 +0010: ADDI R64, R64, R65 ; 1:11 +0011: JUMP 1 ; 1:5 +0012: EOF ; 0:0 +``` + +# Test: FOR iterator is visible after NEXT + +## Source + +```basic +FOR something = 1 TO 10 STEP 8 +NEXT +OUT something +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:17 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 10 ; 1:22 +0003: CMPLEI R65, R65, R66 ; 1:19 +0004: JMPF R65, 9 ; 1:5 +0005: MOVE R64, R64 ; 1:5 +0006: LOADI R65, 8 ; 1:30 +0007: ADDI R64, R64, R65 ; 1:19 +0008: JUMP 1 ; 1:5 +0009: MOVE R66, R64 ; 3:5 +0010: LOADI R65, 258 ; 3:5 +0011: UPCALL 0, R65 ; 3:1, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=17% +``` + +# Test: FOR iterator can be modified in body + +## Source + +```basic +FOR something = 1 TO 5 + OUT something + something = something + 1 +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:17 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 5 ; 1:22 +0003: CMPLEI R65, R65, R66 ; 1:19 +0004: JMPF R65, 15 ; 1:5 +0005: MOVE R66, R64 ; 2:9 +0006: LOADI R65, 258 ; 2:9 +0007: UPCALL 0, R65 ; 2:5, OUT +0008: MOVE R64, R64 ; 3:17 +0009: LOADI R65, 1 ; 3:29 +0010: ADDI R64, R64, R65 ; 3:27 +0011: MOVE R64, R64 ; 1:5 +0012: LOADI R65, 1 ; 1:23 +0013: ADDI R64, R64, R65 ; 1:19 +0014: JUMP 1 ; 1:5 +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=3% +0=5% +``` + +# Test: FOR with floating point bounds and integer sink + +## Source + +```basic +FOR a = 1.1 TO 2.1 + b% = (a * 10) + OUT b +NEXT +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADC R66, 1 ; 1:16 +0003: CMPLED R65, R65, R66 ; 1:13 +0004: JMPF R65, 18 ; 1:5 +0005: MOVE R65, R64 ; 2:11 +0006: LOADI R66, 10 ; 2:15 +0007: ITOD R66 ; 2:15 +0008: MULD R65, R65, R66 ; 2:13 +0009: DTOI R65 ; 2:11 +0010: MOVE R67, R65 ; 3:9 +0011: LOADI R66, 258 ; 3:9 +0012: UPCALL 0, R66 ; 3:5, OUT +0013: MOVE R64, R64 ; 1:5 +0014: LOADI R66, 1 ; 1:19 +0015: ITOD R66 ; 1:19 +0016: ADDD R64, R64, R66 ; 1:13 +0017: JUMP 1 ; 1:5 +0018: EOF ; 0:0 +``` + +## Output + +```plain +0=11% +0=21% +``` + +# Test: FOR with untyped iterator and floating STEP uses double arithmetic + +## Source + +```basic +i = 0 +FOR iter = 0 TO 2 STEP 0.1 + i = i + 1 + IF i = 5 THEN EXIT FOR +NEXT +b% = (iter * 10) +OUT i; b +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: LOADI R65, 0 ; 2:12 +0002: ITOD R65 ; 2:12 +0003: MOVE R66, R65 ; 2:5 +0004: LOADI R67, 2 ; 2:17 +0005: ITOD R67 ; 2:17 +0006: CMPLED R66, R66, R67 ; 2:14 +0007: JMPF R66, 20 ; 2:5 +0008: MOVE R64, R64 ; 3:9 +0009: LOADI R66, 1 ; 3:13 +0010: ADDI R64, R64, R66 ; 3:11 +0011: MOVE R66, R64 ; 4:8 +0012: LOADI R67, 5 ; 4:12 +0013: CMPEQI R66, R66, R67 ; 4:10 +0014: JMPF R66, 16 ; 4:8 +0015: JUMP 20 ; 4:19 +0016: MOVE R65, R65 ; 2:5 +0017: LOADC R66, 0 ; 2:24 +0018: ADDD R65, R65, R66 ; 2:14 +0019: JUMP 3 ; 2:5 +0020: MOVE R66, R65 ; 6:7 +0021: LOADI R67, 10 ; 6:14 +0022: ITOD R67 ; 6:14 +0023: MULD R66, R66, R67 ; 6:12 +0024: DTOI R66 ; 6:7 +0025: MOVE R68, R64 ; 7:5 +0026: LOADI R67, 274 ; 7:5 +0027: MOVE R70, R66 ; 7:8 +0028: LOADI R69, 258 ; 7:8 +0029: UPCALL 0, R67 ; 7:1, OUT +0030: EOF ; 0:0 +``` + +## Output + +```plain +0=5% ; 1=4% +``` + +# Test: FOR with integer iterator and floating STEP can get stuck + +## Source + +```basic +i = 0 +DIM a AS INTEGER +FOR a = 1.0 TO 2.0 STEP 0.4 + i = i + 1 + IF i = 100 THEN + GOTO @out + END IF +NEXT +@out: +OUT i +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: LOADI R65, 0 ; 2:5 +0002: LOADC R65, 0 ; 3:9 +0003: DTOI R65 ; 3:9 +0004: MOVE R66, R65 ; 3:5 +0005: LOADC R67, 1 ; 3:16 +0006: ITOD R66 ; 3:13 +0007: CMPLED R66, R66, R67 ; 3:13 +0008: JMPF R66, 23 ; 3:5 +0009: MOVE R64, R64 ; 4:9 +0010: LOADI R66, 1 ; 4:13 +0011: ADDI R64, R64, R66 ; 4:11 +0012: MOVE R66, R64 ; 5:8 +0013: LOADI R67, 100 ; 5:12 +0014: CMPEQI R66, R66, R67 ; 5:10 +0015: JMPF R66, 17 ; 5:8 +0016: JUMP 23 ; 6:14 +0017: MOVE R65, R65 ; 3:5 +0018: LOADC R66, 2 ; 3:25 +0019: ITOD R65 ; 3:13 +0020: ADDD R65, R65, R66 ; 3:13 +0021: DTOI R65 ; 3:5 +0022: JUMP 4 ; 3:5 +0023: MOVE R67, R64 ; 10:5 +0024: LOADI R66, 258 ; 10:5 +0025: UPCALL 0, R66 ; 10:1, OUT +0026: EOF ; 0:0 +``` + +## Output + +```plain +0=100% +``` + +# Test: EXIT FOR exits innermost FOR + +## Source + +```basic +FOR i = 1 TO 10 + IF i = 5 THEN EXIT FOR + OUT i +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 10 ; 1:14 +0003: CMPLEI R65, R65, R66 ; 1:11 +0004: JMPF R65, 17 ; 1:5 +0005: MOVE R65, R64 ; 2:8 +0006: LOADI R66, 5 ; 2:12 +0007: CMPEQI R65, R65, R66 ; 2:10 +0008: JMPF R65, 10 ; 2:8 +0009: JUMP 17 ; 2:19 +0010: MOVE R66, R64 ; 3:9 +0011: LOADI R65, 258 ; 3:9 +0012: UPCALL 0, R65 ; 3:5, OUT +0013: MOVE R64, R64 ; 1:5 +0014: LOADI R65, 1 ; 1:16 +0015: ADDI R64, R64, R65 ; 1:11 +0016: JUMP 1 ; 1:5 +0017: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=2% +0=3% +0=4% +``` + +# Test: EXIT DO and EXIT FOR in nested loops + +## Source + +```basic +FOR i = 1 TO 10 + j = 5 + DO WHILE j > 0 + IF j = 2 THEN EXIT DO + IF i = 4 THEN EXIT FOR + OUT i; j + j = j - 1 + LOOP +NEXT +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:9 +0001: MOVE R65, R64 ; 1:5 +0002: LOADI R66, 10 ; 1:14 +0003: CMPLEI R65, R65, R66 ; 1:11 +0004: JMPF R65, 33 ; 1:5 +0005: LOADI R65, 5 ; 2:9 +0006: MOVE R66, R65 ; 3:14 +0007: LOADI R67, 0 ; 3:18 +0008: CMPGTI R66, R66, R67 ; 3:16 +0009: JMPF R66, 29 ; 3:14 +0010: MOVE R66, R65 ; 4:12 +0011: LOADI R67, 2 ; 4:16 +0012: CMPEQI R66, R66, R67 ; 4:14 +0013: JMPF R66, 15 ; 4:12 +0014: JUMP 29 ; 4:23 +0015: MOVE R66, R64 ; 5:12 +0016: LOADI R67, 4 ; 5:16 +0017: CMPEQI R66, R66, R67 ; 5:14 +0018: JMPF R66, 20 ; 5:12 +0019: JUMP 33 ; 5:23 +0020: MOVE R67, R64 ; 6:13 +0021: LOADI R66, 274 ; 6:13 +0022: MOVE R69, R65 ; 6:16 +0023: LOADI R68, 258 ; 6:16 +0024: UPCALL 0, R66 ; 6:9, OUT +0025: MOVE R65, R65 ; 7:13 +0026: LOADI R66, 1 ; 7:17 +0027: SUBI R65, R65, R66 ; 7:15 +0028: JUMP 6 ; 3:14 +0029: MOVE R64, R64 ; 1:5 +0030: LOADI R66, 1 ; 1:16 +0031: ADDI R64, R64, R66 ; 1:11 +0032: JUMP 1 ; 1:5 +0033: EOF ; 0:0 +``` + +## Output + +```plain +0=1% ; 1=5% +0=1% ; 1=4% +0=1% ; 1=3% +0=2% ; 1=5% +0=2% ; 1=4% +0=2% ; 1=3% +0=3% ; 1=5% +0=3% ; 1=4% +0=3% ; 1=3% +``` + +# Test: EXIT FOR outside FOR is an error + +## Source + +```basic +EXIT FOR +``` + +## Compilation errors + +```plain +1:1: EXIT FOR outside of FOR +``` + +# Test: EXIT FOR in WHILE is an error + +## Source + +```basic +WHILE TRUE + EXIT FOR +WEND +``` + +## Compilation errors + +```plain +2:5: EXIT FOR outside of FOR +``` + +# Test: FOR guard errors with incompatible types and positive STEP + +## Source + +```basic +FOR i = "a" TO 3 +NEXT +``` + +## Compilation errors + +```plain +1:13: Cannot <= STRING and INTEGER +``` + +# Test: FOR guard errors with incompatible types and negative STEP + +## Source + +```basic +FOR i = 1 TO "b" STEP -8 +NEXT +``` + +## Compilation errors + +```plain +1:11: Cannot >= INTEGER and STRING +``` diff --git a/core2/tests/test_functions.md b/core2/tests/test_functions.md new file mode 100644 index 00000000..a8c0567e --- /dev/null +++ b/core2/tests/test_functions.md @@ -0,0 +1,1320 @@ +# Test: Return value matches function type + +## Source + +```basic +FUNCTION foo$ + foo = "abc" +END FUNCTION + +OUT foo$ +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:10 + +;; FOO (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R64, 1 ; 2:11 +0003: RETURN ; 3:1 +;; FOO (END) + +0004: CALL R65, 1 ; 5:5, FOO +0005: LOADI R64, 259 ; 5:5 +0006: UPCALL 0, R64 ; 5:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=abc$ +``` + +# Test: Type mismatch in return value + +## Source + +```basic +FUNCTION foo$ + foo = 3 +END FUNCTION + +OUT foo$ +``` + +## Compilation errors + +```plain +2:11: Cannot assign value of type INTEGER to variable of type STRING +``` + +# Test: Elaborate execution flow + +## Source + +```basic +a = 10 + +FUNCTION foo + a = 20 + OUT "Inside", a + foo = 30 +END FUNCTION + +OUT "Before", a +OUT "Return value", foo +OUT "After", a +``` + +## Disassembly + +```asm +0000: LOADI R64, 10 ; 1:5 +0001: JUMP 11 ; 3:10 + +;; FOO (BEGIN) +0002: LOADI R64, 0 ; 3:10 +0003: LOADI R65, 20 ; 4:9 +0004: LOADI R67, 0 ; 5:9 +0005: LOADI R66, 291 ; 5:9 +0006: MOVE R69, R65 ; 5:19 +0007: LOADI R68, 258 ; 5:19 +0008: UPCALL 0, R66 ; 5:5, OUT +0009: LOADI R64, 30 ; 6:11 +0010: RETURN ; 7:1 +;; FOO (END) + +0011: LOADI R66, 1 ; 9:5 +0012: LOADI R65, 291 ; 9:5 +0013: MOVE R68, R64 ; 9:15 +0014: LOADI R67, 258 ; 9:15 +0015: UPCALL 0, R65 ; 9:1, OUT +0016: LOADI R66, 2 ; 10:5 +0017: LOADI R65, 291 ; 10:5 +0018: CALL R68, 2 ; 10:21, FOO +0019: LOADI R67, 258 ; 10:21 +0020: UPCALL 0, R65 ; 10:1, OUT +0021: LOADI R66, 3 ; 11:5 +0022: LOADI R65, 291 ; 11:5 +0023: MOVE R68, R64 ; 11:14 +0024: LOADI R67, 258 ; 11:14 +0025: UPCALL 0, R65 ; 11:1, OUT +0026: EOF ; 0:0 +``` + +## Output + +```plain +0=Before$ , 1=10% +0=Inside$ , 1=20% +0=Return value$ , 1=30% +0=After$ , 1=10% +``` + +# Test: Function call requires jumping backwards + +## Source + +```basic +FUNCTION first + OUT "first" + first = 123 +END FUNCTION + +FUNCTION second + second = first +END FUNCTION + +OUT second +``` + +## Disassembly + +```asm +0000: JUMP 7 ; 1:10 + +;; FIRST (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R66, 0 ; 2:9 +0003: LOADI R65, 259 ; 2:9 +0004: UPCALL 0, R65 ; 2:5, OUT +0005: LOADI R64, 123 ; 3:13 +0006: RETURN ; 4:1 +;; FIRST (END) + +0007: JUMP 11 ; 6:10 + +;; SECOND (BEGIN) +0008: LOADI R64, 0 ; 6:10 +0009: CALL R64, 1 ; 7:14, FIRST +0010: RETURN ; 8:1 +;; SECOND (END) + +0011: CALL R65, 8 ; 10:5, SECOND +0012: LOADI R64, 258 ; 10:5 +0013: UPCALL 0, R64 ; 10:1, OUT +0014: EOF ; 0:0 +``` + +## Output + +```plain +0=first$ +0=123% +``` + +# Test: Default return value is reset + +## Source + +```basic +FUNCTION default_double# +END FUNCTION + +FUNCTION default_integer +END FUNCTION + +FUNCTION default_string$ +END FUNCTION + +FUNCTION do_call + OUT 300 + OUT default_double ' Needs to print 0. + OUT default_integer ' Needs to print 0. + OUT default_string ' Needs to print "". +END FUNCTION + +OUT do_call +``` + +## Disassembly + +```asm +0000: JUMP 3 ; 1:10 + +;; DEFAULT_DOUBLE (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: RETURN ; 2:1 +;; DEFAULT_DOUBLE (END) + +0003: JUMP 6 ; 4:10 + +;; DEFAULT_INTEGER (BEGIN) +0004: LOADI R64, 0 ; 4:10 +0005: RETURN ; 5:1 +;; DEFAULT_INTEGER (END) + +0006: JUMP 9 ; 7:10 + +;; DEFAULT_STRING (BEGIN) +0007: LOADI R64, 1 ; 7:10 +0008: RETURN ; 8:1 +;; DEFAULT_STRING (END) + +0009: JUMP 24 ; 10:10 + +;; DO_CALL (BEGIN) +0010: LOADI R64, 0 ; 10:10 +0011: LOADI R66, 300 ; 11:9 +0012: LOADI R65, 258 ; 11:9 +0013: UPCALL 0, R65 ; 11:5, OUT +0014: CALL R66, 1 ; 12:9, DEFAULT_DOUBLE +0015: LOADI R65, 257 ; 12:9 +0016: UPCALL 0, R65 ; 12:5, OUT +0017: CALL R66, 4 ; 13:9, DEFAULT_INTEGER +0018: LOADI R65, 258 ; 13:9 +0019: UPCALL 0, R65 ; 13:5, OUT +0020: CALL R66, 7 ; 14:9, DEFAULT_STRING +0021: LOADI R65, 259 ; 14:9 +0022: UPCALL 0, R65 ; 14:5, OUT +0023: RETURN ; 15:1 +;; DO_CALL (END) + +0024: CALL R65, 10 ; 17:5, DO_CALL +0025: LOADI R64, 258 ; 17:5 +0026: UPCALL 0, R64 ; 17:1, OUT +0027: EOF ; 0:0 +``` + +## Output + +```plain +0=300% +0=0# +0=0% +0=$ +0=0% +``` + +# Test: Local variables + +## Source + +```basic +FUNCTION modify_2 + var = 300 + modify_2 = 2000 + OUT "Inside modify_2", var +END FUNCTION + +FUNCTION modify_1 + var = 200 + OUT "Before modify_2", var + OUT modify_2 + OUT "After modify_2", var + modify_1 = 1000 +END FUNCTION + +var = 100 +OUT "Before modify_1", var +OUT modify_1 +OUT "After modify_1", var +``` + +## Disassembly + +```asm +0000: JUMP 10 ; 1:10 + +;; MODIFY_2 (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R65, 300 ; 2:11 +0003: LOADI R64, 2000 ; 3:16 +0004: LOADI R67, 0 ; 4:9 +0005: LOADI R66, 291 ; 4:9 +0006: MOVE R69, R65 ; 4:28 +0007: LOADI R68, 258 ; 4:28 +0008: UPCALL 0, R66 ; 4:5, OUT +0009: RETURN ; 5:1 +;; MODIFY_2 (END) + +0010: JUMP 28 ; 7:10 + +;; MODIFY_1 (BEGIN) +0011: LOADI R64, 0 ; 7:10 +0012: LOADI R65, 200 ; 8:11 +0013: LOADI R67, 1 ; 9:9 +0014: LOADI R66, 291 ; 9:9 +0015: MOVE R69, R65 ; 9:28 +0016: LOADI R68, 258 ; 9:28 +0017: UPCALL 0, R66 ; 9:5, OUT +0018: CALL R67, 1 ; 10:9, MODIFY_2 +0019: LOADI R66, 258 ; 10:9 +0020: UPCALL 0, R66 ; 10:5, OUT +0021: LOADI R67, 2 ; 11:9 +0022: LOADI R66, 291 ; 11:9 +0023: MOVE R69, R65 ; 11:27 +0024: LOADI R68, 258 ; 11:27 +0025: UPCALL 0, R66 ; 11:5, OUT +0026: LOADI R64, 1000 ; 12:16 +0027: RETURN ; 13:1 +;; MODIFY_1 (END) + +0028: LOADI R64, 100 ; 15:7 +0029: LOADI R66, 3 ; 16:5 +0030: LOADI R65, 291 ; 16:5 +0031: MOVE R68, R64 ; 16:24 +0032: LOADI R67, 258 ; 16:24 +0033: UPCALL 0, R65 ; 16:1, OUT +0034: CALL R66, 11 ; 17:5, MODIFY_1 +0035: LOADI R65, 258 ; 17:5 +0036: UPCALL 0, R65 ; 17:1, OUT +0037: LOADI R66, 4 ; 18:5 +0038: LOADI R65, 291 ; 18:5 +0039: MOVE R68, R64 ; 18:23 +0040: LOADI R67, 258 ; 18:23 +0041: UPCALL 0, R65 ; 18:1, OUT +0042: EOF ; 0:0 +``` + +## Output + +```plain +0=Before modify_1$ , 1=100% +0=Before modify_2$ , 1=200% +0=Inside modify_2$ , 1=300% +0=2000% +0=After modify_2$ , 1=200% +0=1000% +0=After modify_1$ , 1=100% +``` + +# Test: Local is not global + +## Source + +```basic +FUNCTION set_local + local_var = 8 +END FUNCTION + +OUT set_local +OUT local_var +``` + +## Compilation errors + +```plain +6:5: Undefined symbol local_var +``` + +# Test: Argument passing + +## Source + +```basic +FUNCTION add(a, b) + add = a + b +END FUNCTION + +OUT add(3, 5) + add(10, 20) +``` + +## Disassembly + +```asm +0000: JUMP 6 ; 1:10 + +;; ADD (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: MOVE R64, R65 ; 2:11 +0003: MOVE R67, R66 ; 2:15 +0004: ADDI R64, R64, R67 ; 2:13 +0005: RETURN ; 3:1 +;; ADD (END) + +0006: LOADI R67, 3 ; 5:9 +0007: LOADI R68, 5 ; 5:12 +0008: CALL R66, 1 ; 5:5, ADD +0009: MOVE R65, R66 ; 5:5 +0010: LOADI R68, 10 ; 5:21 +0011: LOADI R69, 20 ; 5:25 +0012: CALL R67, 1 ; 5:17, ADD +0013: MOVE R66, R67 ; 5:17 +0014: ADDI R65, R65, R66 ; 5:15 +0015: LOADI R64, 258 ; 5:5 +0016: UPCALL 0, R64 ; 5:1, OUT +0017: EOF ; 0:0 +``` + +## Output + +```plain +0=38% +``` + +# Test: Argument passing with result saved to global + +## Source + +```basic +FUNCTION foo(i) + foo = 42 + i +END FUNCTION + +DIM SHARED ret +ret = foo(3) +OUT ret +``` + +## Disassembly + +```asm +0000: JUMP 6 ; 1:10 + +;; FOO (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R64, 42 ; 2:11 +0003: MOVE R66, R65 ; 2:16 +0004: ADDI R64, R64, R66 ; 2:14 +0005: RETURN ; 3:1 +;; FOO (END) + +0006: LOADI R0, 0 ; 5:12 +0007: LOADI R65, 3 ; 6:11 +0008: CALL R64, 1 ; 6:7, FOO +0009: MOVE R0, R64 ; 6:7 +0010: MOVE R65, R0 ; 7:5 +0011: LOADI R64, 258 ; 7:5 +0012: UPCALL 0, R64 ; 7:1, OUT +0013: EOF ; 0:0 +``` + +## Output + +```plain +0=45% +``` + +# Test: Arguments are passed by value + +## Source + +```basic +FUNCTION change_integer(i%) + i = 3 +END FUNCTION + +FUNCTION change_string(s$) + s = "foo" +END FUNCTION + +i = 5 +OUT change_integer(i) +OUT i + +s = "bar" +OUT change_string(s) +OUT s +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:10 + +;; CHANGE_INTEGER (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R65, 3 ; 2:9 +0003: RETURN ; 3:1 +;; CHANGE_INTEGER (END) + +0004: JUMP 8 ; 5:10 + +;; CHANGE_STRING (BEGIN) +0005: LOADI R64, 0 ; 5:10 +0006: LOADI R65, 0 ; 6:9 +0007: RETURN ; 7:1 +;; CHANGE_STRING (END) + +0008: LOADI R64, 5 ; 9:5 +0009: MOVE R68, R64 ; 10:20 +0010: CALL R67, 1 ; 10:5, CHANGE_INTEGER +0011: MOVE R66, R67 ; 10:5 +0012: LOADI R65, 258 ; 10:5 +0013: UPCALL 0, R65 ; 10:1, OUT +0014: MOVE R66, R64 ; 11:5 +0015: LOADI R65, 258 ; 11:5 +0016: UPCALL 0, R65 ; 11:1, OUT +0017: LOADI R65, 1 ; 13:5 +0018: MOVE R69, R65 ; 14:19 +0019: CALL R68, 5 ; 14:5, CHANGE_STRING +0020: MOVE R67, R68 ; 14:5 +0021: LOADI R66, 258 ; 14:5 +0022: UPCALL 0, R66 ; 14:1, OUT +0023: MOVE R67, R65 ; 15:5 +0024: LOADI R66, 259 ; 15:5 +0025: UPCALL 0, R66 ; 15:1, OUT +0026: EOF ; 0:0 +``` + +## Output + +```plain +0=0% +0=5% +0=0% +0=bar$ +``` + +# Test: Upcall with repeated arguments and return of type double + +## Source + +```basic +OUT SUM_DOUBLES(3.4, 2, 7.1) +``` + +## Disassembly + +```asm +0000: LOADC R68, 0 ; 1:17 +0001: LOADI R67, 289 ; 1:17 +0002: LOADI R70, 2 ; 1:22 +0003: LOADI R69, 290 ; 1:22 +0004: LOADC R72, 1 ; 1:25 +0005: LOADI R71, 257 ; 1:25 +0006: UPCALL 0, R66 ; 1:5, SUM_DOUBLES +0007: MOVE R65, R66 ; 1:5 +0008: LOADI R64, 257 ; 1:5 +0009: UPCALL 1, R64 ; 1:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=12.5# +``` + +# Test: Upcall returning integer + +## Source + +```basic +OUT SUM_INTEGERS(3, 2, 7) +``` + +## Disassembly + +```asm +0000: LOADI R68, 3 ; 1:18 +0001: LOADI R67, 290 ; 1:18 +0002: LOADI R70, 2 ; 1:21 +0003: LOADI R69, 290 ; 1:21 +0004: LOADI R72, 7 ; 1:24 +0005: LOADI R71, 258 ; 1:24 +0006: UPCALL 0, R66 ; 1:5, SUM_INTEGERS +0007: MOVE R65, R66 ; 1:5 +0008: LOADI R64, 258 ; 1:5 +0009: UPCALL 1, R64 ; 1:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=12% +``` + +# Test: Upcall returning string + +## Source + +```basic +OUT CONCAT$("hello", " ", "world") +``` + +## Disassembly + +```asm +0000: LOADI R68, 0 ; 1:13 +0001: LOADI R67, 291 ; 1:13 +0002: LOADI R70, 1 ; 1:22 +0003: LOADI R69, 291 ; 1:22 +0004: LOADI R72, 2 ; 1:27 +0005: LOADI R71, 259 ; 1:27 +0006: UPCALL 0, R66 ; 1:5, CONCAT +0007: MOVE R65, R66 ; 1:5 +0008: LOADI R64, 259 ; 1:5 +0009: UPCALL 1, R64 ; 1:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=hello world$ +``` + +# Test: Upcall returning boolean + +## Source + +```basic +OUT IS_POSITIVE?(42) +``` + +## Disassembly + +```asm +0000: LOADI R67, 42 ; 1:18 +0001: UPCALL 0, R66 ; 1:5, IS_POSITIVE +0002: MOVE R65, R66 ; 1:5 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 1, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Argless upcall + +## Source + +```basic +OUT MEANING_OF_LIFE +``` + +## Disassembly + +```asm +0000: UPCALL 0, R65 ; 1:5, MEANING_OF_LIFE +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 1, R64 ; 1:1, OUT +0003: EOF ; 0:0 +``` + +## Output + +```plain +0=42% +``` + +# Test: Function upcall result assigned to global + +## Source + +```basic +DIM SHARED x AS DOUBLE +x = SUM_DOUBLES(1.5, 2.5) +OUT x +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADC R66, 0 ; 2:17 +0002: LOADI R65, 289 ; 2:17 +0003: LOADC R68, 1 ; 2:22 +0004: LOADI R67, 257 ; 2:22 +0005: UPCALL 0, R64 ; 2:5, SUM_DOUBLES +0006: MOVE R0, R64 ; 2:5 +0007: MOVE R65, R0 ; 3:5 +0008: LOADI R64, 257 ; 3:5 +0009: UPCALL 1, R64 ; 3:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=4# +``` + +# Test: Argless upcall result assigned to global + +## Source + +```basic +DIM SHARED x +x = MEANING_OF_LIFE +OUT x +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: UPCALL 0, R64 ; 2:5, MEANING_OF_LIFE +0002: MOVE R0, R64 ; 2:5 +0003: MOVE R65, R0 ; 3:5 +0004: LOADI R64, 258 ; 3:5 +0005: UPCALL 1, R64 ; 3:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=42% +``` + +# Test: Function upcall in expression + +## Source + +```basic +OUT SUM_DOUBLES(1.0, 2.0) + SUM_DOUBLES(3.0, 4.0) +``` + +## Disassembly + +```asm +0000: LOADC R68, 0 ; 1:17 +0001: LOADI R67, 289 ; 1:17 +0002: LOADC R70, 1 ; 1:22 +0003: LOADI R69, 257 ; 1:22 +0004: UPCALL 0, R66 ; 1:5, SUM_DOUBLES +0005: MOVE R65, R66 ; 1:5 +0006: LOADC R69, 2 ; 1:41 +0007: LOADI R68, 289 ; 1:41 +0008: LOADC R71, 3 ; 1:46 +0009: LOADI R70, 257 ; 1:46 +0010: UPCALL 0, R67 ; 1:29, SUM_DOUBLES +0011: MOVE R66, R67 ; 1:29 +0012: ADDD R65, R65, R66 ; 1:27 +0013: LOADI R64, 257 ; 1:5 +0014: UPCALL 1, R64 ; 1:1, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=10# +``` + +# Test: Error: calling an argless function upcall with arguments + +## Source + +```basic +OUT MEANING_OF_LIFE(1) +``` + +## Compilation errors + +```plain +1:5: MEANING_OF_LIFE expected no arguments +``` + +# Test: Error: calling an argless function upcall with empty parens + +## Source + +```basic +OUT MEANING_OF_LIFE() +``` + +## Compilation errors + +```plain +1:5: MEANING_OF_LIFE expected no arguments +``` + +# Test: Error: using a function upcall that requires arguments without arguments + +## Source + +```basic +x = SUM_DOUBLES +``` + +## Compilation errors + +```plain +1:5: SUM_DOUBLES expected [arg1, .., argN] +``` + +# Test: Function name conflicts with existing global variable + +## Source + +```basic +DIM SHARED g AS INTEGER +FUNCTION g% +END FUNCTION +``` + +## Compilation errors + +```plain +2:10: Cannot redefine g% +``` + +# Test: Function name conflicts with existing global array + +## Source + +```basic +DIM SHARED g(3) AS INTEGER +FUNCTION g% +END FUNCTION +``` + +## Compilation errors + +```plain +2:10: Cannot redefine g% +``` + +# Test: Early function exit + +## Source + +```basic +FUNCTION maybe_exit(i%) + maybe_exit = 1 + IF i > 2 THEN EXIT FUNCTION + maybe_exit = 2 +END FUNCTION + +FOR i = 0 TO 5 + OUT maybe_exit(i) +NEXT +``` + +## Disassembly + +```asm +0000: JUMP 10 ; 1:10 + +;; MAYBE_EXIT (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R64, 1 ; 2:18 +0003: MOVE R66, R65 ; 3:8 +0004: LOADI R67, 2 ; 3:12 +0005: CMPGTI R66, R66, R67 ; 3:10 +0006: JMPF R66, 8 ; 3:8 +0007: JUMP 9 ; 3:19 +0008: LOADI R64, 2 ; 4:18 +0009: RETURN ; 5:1 +;; MAYBE_EXIT (END) + +0010: LOADI R64, 0 ; 7:9 +0011: MOVE R65, R64 ; 7:5 +0012: LOADI R66, 5 ; 7:14 +0013: CMPLEI R65, R65, R66 ; 7:11 +0014: JMPF R65, 24 ; 7:5 +0015: MOVE R68, R64 ; 8:20 +0016: CALL R67, 1 ; 8:9, MAYBE_EXIT +0017: MOVE R66, R67 ; 8:9 +0018: LOADI R65, 258 ; 8:9 +0019: UPCALL 0, R65 ; 8:5, OUT +0020: MOVE R64, R64 ; 7:5 +0021: LOADI R65, 1 ; 7:15 +0022: ADDI R64, R64, R65 ; 7:11 +0023: JUMP 11 ; 7:5 +0024: EOF ; 0:0 +``` + +## Output + +```plain +0=2% +0=2% +0=2% +0=1% +0=1% +0=1% +``` + +# Test: EXIT FUNCTION outside FUNCTION + +## Source + +```basic +FUNCTION a +END FUNCTION +EXIT FUNCTION +``` + +## Compilation errors + +```plain +3:1: EXIT FUNCTION outside of FUNCTION +``` + +# Test: EXIT SUB in FUNCTION + +## Source + +```basic +FUNCTION a + EXIT SUB +END FUNCTION +``` + +## Compilation errors + +```plain +2:5: EXIT SUB outside of SUB +``` + +# Test: Recursive function + +## Source + +```basic +DIM SHARED calls AS INTEGER +FUNCTION factorial(n%) + IF n = 1 THEN factorial = 1 ELSE factorial = n * factorial(n - 1) + calls = calls + 1 +END FUNCTION +OUT calls; factorial(5) +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: JUMP 22 ; 2:10 + +;; FACTORIAL (BEGIN) +0002: LOADI R64, 0 ; 2:10 +0003: MOVE R66, R65 ; 3:8 +0004: LOADI R67, 1 ; 3:12 +0005: CMPEQI R66, R66, R67 ; 3:10 +0006: JMPF R66, 9 ; 3:8 +0007: LOADI R64, 1 ; 3:31 +0008: JUMP 18 ; 3:8 +0009: LOADI R66, 1 ; 3:33 +0010: JMPF R66, 18 ; 3:33 +0011: MOVE R64, R65 ; 3:50 +0012: MOVE R68, R65 ; 3:64 +0013: LOADI R69, 1 ; 3:68 +0014: SUBI R68, R68, R69 ; 3:66 +0015: CALL R67, 2 ; 3:54, FACTORIAL +0016: MOVE R66, R67 ; 3:54 +0017: MULI R64, R64, R66 ; 3:52 +0018: MOVE R0, R0 ; 4:13 +0019: LOADI R66, 1 ; 4:21 +0020: ADDI R0, R0, R66 ; 4:19 +0021: RETURN ; 5:1 +;; FACTORIAL (END) + +0022: MOVE R65, R0 ; 6:5 +0023: LOADI R64, 274 ; 6:5 +0024: LOADI R69, 5 ; 6:22 +0025: CALL R68, 2 ; 6:12, FACTORIAL +0026: MOVE R67, R68 ; 6:12 +0027: LOADI R66, 258 ; 6:12 +0028: UPCALL 0, R64 ; 6:1, OUT +0029: EOF ; 0:0 +``` + +## Output + +```plain +0=0% ; 1=120% +``` + +# Test: Mutually recursive functions + +## Source + +```basic +DECLARE FUNCTION pong(n%) + +FUNCTION ping(n%) + OUT "ping"; n + IF n = 0 THEN + ping = 100 + ELSE + ping = pong(n - 1) + 1 + END IF +END FUNCTION + +FUNCTION pong(n%) + OUT "pong"; n + IF n = 0 THEN + pong = 200 + ELSE + pong = ping(n - 1) + 10 + END IF +END FUNCTION + +OUT ping(3) +``` + +## Disassembly + +```asm +0000: JUMP 23 ; 3:10 + +;; PING (BEGIN) +0001: LOADI R64, 0 ; 3:10 +0002: LOADI R67, 0 ; 4:9 +0003: LOADI R66, 275 ; 4:9 +0004: MOVE R69, R65 ; 4:17 +0005: LOADI R68, 258 ; 4:17 +0006: UPCALL 0, R66 ; 4:5, OUT +0007: MOVE R66, R65 ; 5:8 +0008: LOADI R67, 0 ; 5:12 +0009: CMPEQI R66, R66, R67 ; 5:10 +0010: JMPF R66, 13 ; 5:8 +0011: LOADI R64, 100 ; 6:16 +0012: JUMP 22 ; 5:8 +0013: LOADI R66, 1 ; 7:5 +0014: JMPF R66, 22 ; 7:5 +0015: MOVE R67, R65 ; 8:21 +0016: LOADI R68, 1 ; 8:25 +0017: SUBI R67, R67, R68 ; 8:23 +0018: CALL R66, 24 ; 8:16, PONG +0019: MOVE R64, R66 ; 8:16 +0020: LOADI R66, 1 ; 8:30 +0021: ADDI R64, R64, R66 ; 8:28 +0022: RETURN ; 10:1 +;; PING (END) + +0023: JUMP 46 ; 12:10 + +;; PONG (BEGIN) +0024: LOADI R64, 0 ; 12:10 +0025: LOADI R67, 1 ; 13:9 +0026: LOADI R66, 275 ; 13:9 +0027: MOVE R69, R65 ; 13:17 +0028: LOADI R68, 258 ; 13:17 +0029: UPCALL 0, R66 ; 13:5, OUT +0030: MOVE R66, R65 ; 14:8 +0031: LOADI R67, 0 ; 14:12 +0032: CMPEQI R66, R66, R67 ; 14:10 +0033: JMPF R66, 36 ; 14:8 +0034: LOADI R64, 200 ; 15:16 +0035: JUMP 45 ; 14:8 +0036: LOADI R66, 1 ; 16:5 +0037: JMPF R66, 45 ; 16:5 +0038: MOVE R67, R65 ; 17:21 +0039: LOADI R68, 1 ; 17:25 +0040: SUBI R67, R67, R68 ; 17:23 +0041: CALL R66, 1 ; 17:16, PING +0042: MOVE R64, R66 ; 17:16 +0043: LOADI R66, 10 ; 17:30 +0044: ADDI R64, R64, R66 ; 17:28 +0045: RETURN ; 19:1 +;; PONG (END) + +0046: LOADI R67, 3 ; 21:10 +0047: CALL R66, 1 ; 21:5, PING +0048: MOVE R65, R66 ; 21:5 +0049: LOADI R64, 258 ; 21:5 +0050: UPCALL 0, R64 ; 21:1, OUT +0051: EOF ; 0:0 +``` + +## Output + +```plain +0=ping$ ; 1=3% +0=pong$ ; 1=2% +0=ping$ ; 1=1% +0=pong$ ; 1=0% +0=212% +``` + +# Test: Calling a function as a command is an error + +## Source + +```basic +FUNCTION f + OUT "foo" +END FUNCTION +f +``` + +## Compilation errors + +```plain +4:1: Cannot call F (not a function) +``` + +# Test: Calling an argless function upcall as a command is an error + +## Source + +```basic +MEANING_OF_LIFE +``` + +## Compilation errors + +```plain +1:1: Cannot call MEANING_OF_LIFE (not a function) +``` + +# Test: Calling a function upcall with arguments as a command is an error + +## Source + +```basic +SUM_DOUBLES 1.0, 2.0 +``` + +## Compilation errors + +```plain +1:1: Cannot call SUM_DOUBLES (not a function) +``` + +# Test: Function redefines existing function + +## Source + +```basic +FUNCTION foo +END FUNCTION + +FUNCTION foo +END FUNCTION +``` + +## Compilation errors + +```plain +4:10: Cannot redefine foo% +``` + +# Test: Function redefines existing sub + +## Source + +```basic +SUB foo +END SUB + +FUNCTION foo +END FUNCTION +``` + +## Compilation errors + +```plain +4:10: Cannot redefine foo% +``` + +# Test: Function nesting within a function + +## Source + +```basic +FUNCTION foo + FUNCTION bar + END FUNCTION +END FUNCTION +``` + +## Compilation errors + +```plain +2:5: Cannot nest FUNCTION or SUB definitions +``` + +# Test: Function nesting within a sub + +## Source + +```basic +SUB foo + FUNCTION bar + END FUNCTION +END SUB +``` + +## Compilation errors + +```plain +2:5: Cannot nest FUNCTION or SUB definitions +``` + +# Test: Function declarations + +## Source + +```basic +DECLARE FUNCTION foo +DECLARE FUNCTION foo% +DECLARE FUNCTION bar(a AS STRING) +``` + +## Disassembly + +```asm +0000: EOF ; 0:0 +``` + +# Test: Function declarations match definition + +## Source + +```basic +DECLARE FUNCTION foo + +FUNCTION foo +END FUNCTION + +DECLARE FUNCTION foo +``` + +## Disassembly + +```asm +0000: JUMP 3 ; 3:10 + +;; FOO (BEGIN) +0001: LOADI R64, 0 ; 3:10 +0002: RETURN ; 4:1 +;; FOO (END) + +0003: EOF ; 0:0 +``` + +# Test: Function declarations must be top-level + +## Source + +```basic + +FUNCTION foo + DECLARE FUNCTION bar +END FUNCTION +``` + +## Compilation errors + +```plain +3:22: Cannot nest FUNCTION or SUB declarations nor definitions +``` + +# Test: Function pre-declaration does not match pre-definition + +## Source + +```basic +DECLARE FUNCTION foo + +FUNCTION foo# +END FUNCTION +``` + +## Compilation errors + +```plain +3:10: Cannot redefine foo# +``` + +# Test: Function post-declaration does not match definition + +## Source + +```basic +FUNCTION foo# +END FUNCTION + +DECLARE FUNCTION foo +``` + +## Compilation errors + +```plain +4:18: Cannot redefine foo% +``` + +# Test: Function declarations do not match + +## Source + +```basic +DECLARE FUNCTION foo +DECLARE FUNCTION foo# +``` + +## Compilation errors + +```plain +2:18: Cannot redefine foo# +``` + +# Test: Function redeclared as sub + +## Source + +```basic +DECLARE FUNCTION foo +DECLARE SUB foo +``` + +## Compilation errors + +```plain +2:13: Cannot redefine foo +``` diff --git a/core2/tests/test_globals.md b/core2/tests/test_globals.md new file mode 100644 index 00000000..5b9aa4b1 --- /dev/null +++ b/core2/tests/test_globals.md @@ -0,0 +1,346 @@ +# Test: Default zero values + +## Source + +```basic +DIM SHARED b1 AS BOOLEAN +DIM SHARED d1 AS DOUBLE +DIM SHARED i1 AS INTEGER +DIM SHARED i2 +DIM SHARED s1 AS STRING + +OUT b1, d1, i1, i2, s1 +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R1, 0 ; 2:12 +0002: LOADI R2, 0 ; 3:12 +0003: LOADI R3, 0 ; 4:12 +0004: ALLOC R4, STRING ; 5:12 +0005: MOVE R65, R0 ; 7:5 +0006: LOADI R64, 288 ; 7:5 +0007: MOVE R67, R1 ; 7:9 +0008: LOADI R66, 289 ; 7:9 +0009: MOVE R69, R2 ; 7:13 +0010: LOADI R68, 290 ; 7:13 +0011: MOVE R71, R3 ; 7:17 +0012: LOADI R70, 290 ; 7:17 +0013: MOVE R73, R4 ; 7:21 +0014: LOADI R72, 259 ; 7:21 +0015: UPCALL 0, R64 ; 7:1, OUT +0016: EOF ; 0:0 +``` + +## Output + +```plain +0=false? , 1=0# , 2=0% , 3=0% , 4=$ +``` + +# Test: Set global variables to explicit values + +## Source + +```basic +DIM SHARED b1 AS BOOLEAN +DIM SHARED d1 AS DOUBLE +DIM SHARED i1 AS INTEGER +DIM SHARED i2 +DIM SHARED s1 AS STRING + +b1 = TRUE +d1 = 2.3 +i1 = 5 +i2 = 7 +s1 = "text" +OUT b1, d1, i1, i2, s1 +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R1, 0 ; 2:12 +0002: LOADI R2, 0 ; 3:12 +0003: LOADI R3, 0 ; 4:12 +0004: ALLOC R4, STRING ; 5:12 +0005: LOADI R0, 1 ; 7:6 +0006: LOADC R1, 0 ; 8:6 +0007: LOADI R2, 5 ; 9:6 +0008: LOADI R3, 7 ; 10:6 +0009: LOADI R4, 1 ; 11:6 +0010: MOVE R65, R0 ; 12:5 +0011: LOADI R64, 288 ; 12:5 +0012: MOVE R67, R1 ; 12:9 +0013: LOADI R66, 289 ; 12:9 +0014: MOVE R69, R2 ; 12:13 +0015: LOADI R68, 290 ; 12:13 +0016: MOVE R71, R3 ; 12:17 +0017: LOADI R70, 290 ; 12:17 +0018: MOVE R73, R4 ; 12:21 +0019: LOADI R72, 259 ; 12:21 +0020: UPCALL 0, R64 ; 12:1, OUT +0021: EOF ; 0:0 +``` + +## Output + +```plain +0=true? , 1=2.3# , 2=5% , 3=7% , 4=text$ +``` + +# Test: Global variables are accessible in functions + +## Source + +```basic +DIM SHARED i1 + +FUNCTION modify_global + i1 = 3 + OUT "Inside after", i1 +END FUNCTION + +i1 = 2 +OUT "Before", i1 +OUT modify_global +OUT "After", i1 +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: JUMP 10 ; 3:10 + +;; MODIFY_GLOBAL (BEGIN) +0002: LOADI R64, 0 ; 3:10 +0003: LOADI R0, 3 ; 4:10 +0004: LOADI R66, 0 ; 5:9 +0005: LOADI R65, 291 ; 5:9 +0006: MOVE R68, R0 ; 5:25 +0007: LOADI R67, 258 ; 5:25 +0008: UPCALL 0, R65 ; 5:5, OUT +0009: RETURN ; 6:1 +;; MODIFY_GLOBAL (END) + +0010: LOADI R0, 2 ; 8:6 +0011: LOADI R65, 1 ; 9:5 +0012: LOADI R64, 291 ; 9:5 +0013: MOVE R67, R0 ; 9:15 +0014: LOADI R66, 258 ; 9:15 +0015: UPCALL 0, R64 ; 9:1, OUT +0016: CALL R65, 2 ; 10:5, MODIFY_GLOBAL +0017: LOADI R64, 258 ; 10:5 +0018: UPCALL 0, R64 ; 10:1, OUT +0019: LOADI R65, 2 ; 11:5 +0020: LOADI R64, 291 ; 11:5 +0021: MOVE R67, R0 ; 11:14 +0022: LOADI R66, 258 ; 11:14 +0023: UPCALL 0, R64 ; 11:1, OUT +0024: EOF ; 0:0 +``` + +## Output + +```plain +0=Before$ , 1=2% +0=Inside after$ , 1=3% +0=0% +0=After$ , 1=3% +``` + +# Test: Global variables are accessible in subroutines + +## Source + +```basic +DIM SHARED i1 + +SUB modify_global + i1 = 3 + OUT "Inside after", i1 +END SUB + +i1 = 2 +OUT "Before", i1 +modify_global +OUT "After", i1 +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: JUMP 9 ; 3:5 + +;; MODIFY_GLOBAL (BEGIN) +0002: LOADI R0, 3 ; 4:10 +0003: LOADI R65, 0 ; 5:9 +0004: LOADI R64, 291 ; 5:9 +0005: MOVE R67, R0 ; 5:25 +0006: LOADI R66, 258 ; 5:25 +0007: UPCALL 0, R64 ; 5:5, OUT +0008: RETURN ; 6:1 +;; MODIFY_GLOBAL (END) + +0009: LOADI R0, 2 ; 8:6 +0010: LOADI R65, 1 ; 9:5 +0011: LOADI R64, 291 ; 9:5 +0012: MOVE R67, R0 ; 9:15 +0013: LOADI R66, 258 ; 9:15 +0014: UPCALL 0, R64 ; 9:1, OUT +0015: CALL R64, 2 ; 10:1, MODIFY_GLOBAL +0016: LOADI R65, 2 ; 11:5 +0017: LOADI R64, 291 ; 11:5 +0018: MOVE R67, R0 ; 11:14 +0019: LOADI R66, 258 ; 11:14 +0020: UPCALL 0, R64 ; 11:1, OUT +0021: EOF ; 0:0 +``` + +## Output + +```plain +0=Before$ , 1=2% +0=Inside after$ , 1=3% +0=After$ , 1=3% +``` + +# Test: Integer to double promotion + +## Source + +```basic +DIM SHARED d AS DOUBLE +d = 6 +OUT d +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R0, 6 ; 2:5 +0002: ITOD R0 ; 2:5 +0003: MOVE R65, R0 ; 3:5 +0004: LOADI R64, 257 ; 3:5 +0005: UPCALL 0, R64 ; 3:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=6# +``` + +# Test: Double to integer demotion + +## Source + +```basic +DIM SHARED i1 AS INTEGER +DIM SHARED i2 AS INTEGER +i1 = 3.2 +i2 = 3.7 +OUT i1, i2 +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: LOADI R1, 0 ; 2:12 +0002: LOADC R0, 0 ; 3:6 +0003: DTOI R0 ; 3:6 +0004: LOADC R1, 1 ; 4:6 +0005: DTOI R1 ; 4:6 +0006: MOVE R65, R0 ; 5:5 +0007: LOADI R64, 290 ; 5:5 +0008: MOVE R67, R1 ; 5:9 +0009: LOADI R66, 258 ; 5:9 +0010: UPCALL 0, R64 ; 5:1, OUT +0011: EOF ; 0:0 +``` + +## Output + +```plain +0=3% , 1=4% +``` + +# Test: Type mismatch in global variable assignment + +## Source + +```basic +DIM SHARED d +d = "foo" +``` + +## Compilation errors + +```plain +2:5: STRING is not a number +``` + +# Test: Redefine existing shared variable with DIM SHARED + +## Source + +```basic +DIM SHARED x AS INTEGER +DIM SHARED x AS INTEGER +``` + +## Compilation errors + +```plain +2:12: Cannot redefine x +``` + +# Test: DIM SHARED when local variable of same name exists + +## Source + +```basic +FUNCTION foo + x = 5 + DIM SHARED x + OUT x +END FUNCTION + +OUT foo +``` + +## Disassembly + +```asm +0000: JUMP 8 ; 1:10 + +;; FOO (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R65, 5 ; 2:9 +0003: LOADI R0, 0 ; 3:16 +0004: MOVE R67, R65 ; 4:9 +0005: LOADI R66, 258 ; 4:9 +0006: UPCALL 0, R66 ; 4:5, OUT +0007: RETURN ; 5:1 +;; FOO (END) + +0008: CALL R65, 1 ; 7:5, FOO +0009: LOADI R64, 258 ; 7:5 +0010: UPCALL 0, R64 ; 7:1, OUT +0011: EOF ; 0:0 +``` + +## Output + +```plain +0=5% +0=0% +``` diff --git a/core2/tests/test_gosub.md b/core2/tests/test_gosub.md new file mode 100644 index 00000000..59537a94 --- /dev/null +++ b/core2/tests/test_gosub.md @@ -0,0 +1,247 @@ +# Test: Basic flow + +## Source + +```basic +OUT "a" +GOSUB @sub +OUT "c" +END + +@sub: +OUT "b" +RETURN +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R64, 259 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: GOSUB 9 ; 2:7 +0004: LOADI R65, 1 ; 3:5 +0005: LOADI R64, 259 ; 3:5 +0006: UPCALL 0, R64 ; 3:1, OUT +0007: LOADI R64, 0 ; 4:1 +0008: END R64 ; 4:1 +0009: LOADI R65, 2 ; 7:5 +0010: LOADI R64, 259 ; 7:5 +0011: UPCALL 0, R64 ; 7:1, OUT +0012: RETURN ; 8:1 +0013: EOF ; 0:0 +``` + +## Output + +```plain +0=a$ +0=b$ +0=c$ +``` + +# Test: GOSUB with numeric label + +## Source + +```basic +GOSUB 100 +END +100 OUT "in gosub" +RETURN +``` + +## Disassembly + +```asm +0000: GOSUB 3 ; 1:7 +0001: LOADI R64, 0 ; 2:1 +0002: END R64 ; 2:1 +0003: LOADI R65, 0 ; 3:9 +0004: LOADI R64, 259 ; 3:9 +0005: UPCALL 0, R64 ; 3:5, OUT +0006: RETURN ; 4:1 +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=in gosub$ +``` + +# Test: Nested GOSUB calls and returns + +## Source + +```basic +OUT "a" +GOSUB @sub1 +OUT "f" +END + +@sub1: +OUT "b" +GOSUB @sub2 +OUT "e" +RETURN + +@sub2: +OUT "c" +GOSUB @sub3 +OUT "d" +RETURN + +@sub3: +OUT "hello" +RETURN +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R64, 259 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: GOSUB 9 ; 2:7 +0004: LOADI R65, 1 ; 3:5 +0005: LOADI R64, 259 ; 3:5 +0006: UPCALL 0, R64 ; 3:1, OUT +0007: LOADI R64, 0 ; 4:1 +0008: END R64 ; 4:1 +0009: LOADI R65, 2 ; 7:5 +0010: LOADI R64, 259 ; 7:5 +0011: UPCALL 0, R64 ; 7:1, OUT +0012: GOSUB 17 ; 8:7 +0013: LOADI R65, 3 ; 9:5 +0014: LOADI R64, 259 ; 9:5 +0015: UPCALL 0, R64 ; 9:1, OUT +0016: RETURN ; 10:1 +0017: LOADI R65, 4 ; 13:5 +0018: LOADI R64, 259 ; 13:5 +0019: UPCALL 0, R64 ; 13:1, OUT +0020: GOSUB 25 ; 14:7 +0021: LOADI R65, 5 ; 15:5 +0022: LOADI R64, 259 ; 15:5 +0023: UPCALL 0, R64 ; 15:1, OUT +0024: RETURN ; 16:1 +0025: LOADI R65, 6 ; 19:5 +0026: LOADI R64, 259 ; 19:5 +0027: UPCALL 0, R64 ; 19:1, OUT +0028: RETURN ; 20:1 +0029: EOF ; 0:0 +``` + +## Output + +```plain +0=a$ +0=b$ +0=c$ +0=hello$ +0=d$ +0=e$ +0=f$ +``` + +# Test: RETURN without GOSUB + +## Source + +```basic +RETURN +``` + +## Disassembly + +```asm +0000: RETURN ; 1:1 +0001: EOF ; 0:0 +``` + +## Runtime errors + +```plain +1:1: RETURN without GOSUB or FUNCTION call +``` + +# Test: GOSUB target requires backwards jump + +## Source + +```basic +GOTO @skip + +@s: +OUT "In target" +RETURN + +@skip: +GOSUB @s +``` + +## Disassembly + +```asm +0000: JUMP 5 ; 1:6 +0001: LOADI R65, 0 ; 4:5 +0002: LOADI R64, 259 ; 4:5 +0003: UPCALL 0, R64 ; 4:1, OUT +0004: RETURN ; 5:1 +0005: GOSUB 1 ; 8:7 +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=In target$ +``` + +# Test: GOSUB without RETURN still runs target + +## Source + +```basic +GOSUB @sub: @sub: OUT 1 +``` + +## Disassembly + +```asm +0000: GOSUB 1 ; 1:7 +0001: LOADI R65, 1 ; 1:23 +0002: LOADI R64, 258 ; 1:23 +0003: UPCALL 0, R64 ; 1:19, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +``` + +# Test: RETURN reached by GOTO fails + +## Source + +```basic +GOTO @foo +@foo: +RETURN +``` + +## Disassembly + +```asm +0000: JUMP 1 ; 1:6 +0001: RETURN ; 3:1 +0002: EOF ; 0:0 +``` + +## Runtime errors + +```plain +3:1: RETURN without GOSUB or FUNCTION call +``` diff --git a/core2/tests/test_goto.md b/core2/tests/test_goto.md new file mode 100644 index 00000000..09ee4bc9 --- /dev/null +++ b/core2/tests/test_goto.md @@ -0,0 +1,248 @@ +# Test: Basic flow + +## Source + +```basic +OUT "a" +GOTO @foo +OUT "b" +@foo: +OUT "c" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R64, 259 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: JUMP 7 ; 2:6 +0004: LOADI R65, 1 ; 3:5 +0005: LOADI R64, 259 ; 3:5 +0006: UPCALL 0, R64 ; 3:1, OUT +0007: LOADI R65, 2 ; 5:5 +0008: LOADI R64, 259 ; 5:5 +0009: UPCALL 0, R64 ; 5:1, OUT +0010: EOF ; 0:0 +``` + +## Output + +```plain +0=a$ +0=c$ +``` + +# Test: GOTO jumps to label at end of file. + +## Source + +```basic +GOTO @end +OUT "a" +@end: +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:6 +0001: LOADI R65, 0 ; 2:5 +0002: LOADI R64, 259 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: EOF ; 0:0 +``` + +# Test: GOTO target requires backwards jump + +## Source + +```basic +GOTO @skip +OUT "Skipped" +@print_it: +OUT "Print something" +GOTO @end +@skip: +GOTO @print_it +@end: +``` + +## Disassembly + +```asm +0000: JUMP 8 ; 1:6 +0001: LOADI R65, 0 ; 2:5 +0002: LOADI R64, 259 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R65, 1 ; 4:5 +0005: LOADI R64, 259 ; 4:5 +0006: UPCALL 0, R64 ; 4:1, OUT +0007: JUMP 9 ; 5:6 +0008: JUMP 4 ; 7:6 +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=Print something$ +``` + +# Test: GOTO with numeric label + +## Source + +```basic +GOTO 20 +OUT "skipped" +20 OUT "target" +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:6 +0001: LOADI R65, 0 ; 2:5 +0002: LOADI R64, 259 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R65, 1 ; 3:8 +0005: LOADI R64, 259 ; 3:8 +0006: UPCALL 0, R64 ; 3:4, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=target$ +``` + +# Test: GOTO to numeric label in middle of line + +## Source + +```basic +GOTO 20 +OUT "skipped": 20 OUT "target" +``` + +## Disassembly + +```asm +0000: JUMP 4 ; 1:6 +0001: LOADI R65, 0 ; 2:5 +0002: LOADI R64, 259 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R65, 1 ; 2:23 +0005: LOADI R64, 259 ; 2:23 +0006: UPCALL 0, R64 ; 2:19, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=target$ +``` + +# Test: GOTO unknown label + +## Source + +```basic +GOTO @missing +``` + +## Compilation errors + +```plain +1:6: Unknown label missing +``` + +# Test: GOTO unknown numeric label + +## Source + +```basic +GOTO 10 +``` + +## Compilation errors + +```plain +1:6: Unknown label 10 +``` + +# Test: Duplicate label + +## Source + +```basic +@foo: +@foo: +``` + +## Compilation errors + +```plain +2:1: Duplicate label foo +``` + +# Test: Duplicate label in nested control flow + +## Source + +```basic +i = 0 +@a + @b + @c + i = i + 1 + IF i = 1 THEN: GOTO @b: END IF + @a + IF i = 2 THEN: GOTO @c: END IF + IF i = 3 THEN: GOTO @out: END IF +@out +``` + +## Compilation errors + +```plain +7:13: Duplicate label a +``` + +# Test: GOTO as the last statement in a loop + +## Source + +```basic +i = 0 +@again: +IF i = 5 THEN END i +i = i + 1 +GOTO @again +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: MOVE R65, R64 ; 3:4 +0002: LOADI R66, 5 ; 3:8 +0003: CMPEQI R65, R65, R66 ; 3:6 +0004: JMPF R65, 7 ; 3:4 +0005: MOVE R65, R64 ; 3:19 +0006: END R65 ; 3:15 +0007: MOVE R64, R64 ; 4:5 +0008: LOADI R65, 1 ; 4:9 +0009: ADDI R64, R64, R65 ; 4:7 +0010: JUMP 1 ; 5:6 +0011: EOF ; 0:0 +``` + +## Exit code + +```plain +5 +``` diff --git a/core2/tests/test_if.md b/core2/tests/test_if.md new file mode 100644 index 00000000..b535a466 --- /dev/null +++ b/core2/tests/test_if.md @@ -0,0 +1,569 @@ +# Test: Execute IF branch when condition is true + +## Source + +```basic +IF TRUE THEN + OUT "yes" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:4 +0001: JMPF R64, 5 ; 1:4 +0002: LOADI R65, 0 ; 2:9 +0003: LOADI R64, 259 ; 2:9 +0004: UPCALL 0, R64 ; 2:5, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=yes$ +``` + +# Test: Skip IF branch when condition is false + +## Source + +```basic +IF FALSE THEN + OUT "yes" +END IF +OUT "after" +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:4 +0001: JMPF R64, 5 ; 1:4 +0002: LOADI R65, 0 ; 2:9 +0003: LOADI R64, 259 ; 2:9 +0004: UPCALL 0, R64 ; 2:5, OUT +0005: LOADI R65, 1 ; 4:5 +0006: LOADI R64, 259 ; 4:5 +0007: UPCALL 0, R64 ; 4:1, OUT +0008: EOF ; 0:0 +``` + +## Output + +```plain +0=after$ +``` + +# Test: Take ELSEIF branch in IF ELSEIF ELSE chain + +## Source + +```basic +cond1 = FALSE +cond2 = TRUE +IF cond1 THEN + OUT "first" +ELSEIF cond2 THEN + OUT "second" +ELSE + OUT "other" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:9 +0001: LOADI R65, 1 ; 2:9 +0002: MOVE R66, R64 ; 3:4 +0003: JMPF R66, 8 ; 3:4 +0004: LOADI R67, 0 ; 4:9 +0005: LOADI R66, 259 ; 4:9 +0006: UPCALL 0, R66 ; 4:5, OUT +0007: JUMP 19 ; 3:4 +0008: MOVE R66, R65 ; 5:8 +0009: JMPF R66, 14 ; 5:8 +0010: LOADI R67, 1 ; 6:9 +0011: LOADI R66, 259 ; 6:9 +0012: UPCALL 0, R66 ; 6:5, OUT +0013: JUMP 19 ; 5:8 +0014: LOADI R66, 1 ; 7:1 +0015: JMPF R66, 19 ; 7:1 +0016: LOADI R67, 2 ; 8:9 +0017: LOADI R66, 259 ; 8:9 +0018: UPCALL 0, R66 ; 8:5, OUT +0019: EOF ; 0:0 +``` + +## Output + +```plain +0=second$ +``` + +# Test: Take IF branch in IF ELSEIF chain + +## Source + +```basic +cond1 = TRUE +cond2 = FALSE +IF cond1 THEN + OUT "first" +ELSEIF cond2 THEN + OUT "second" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:9 +0001: LOADI R65, 0 ; 2:9 +0002: MOVE R66, R64 ; 3:4 +0003: JMPF R66, 8 ; 3:4 +0004: LOADI R67, 0 ; 4:9 +0005: LOADI R66, 259 ; 4:9 +0006: UPCALL 0, R66 ; 4:5, OUT +0007: JUMP 13 ; 3:4 +0008: MOVE R66, R65 ; 5:8 +0009: JMPF R66, 13 ; 5:8 +0010: LOADI R67, 1 ; 6:9 +0011: LOADI R66, 259 ; 6:9 +0012: UPCALL 0, R66 ; 6:5, OUT +0013: EOF ; 0:0 +``` + +## Output + +```plain +0=first$ +``` + +# Test: Take ELSE branch in IF ELSE block + +## Source + +```basic +cond = FALSE +IF cond THEN + OUT "yes" +ELSE + OUT "no" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:8 +0001: MOVE R65, R64 ; 2:4 +0002: JMPF R65, 7 ; 2:4 +0003: LOADI R66, 0 ; 3:9 +0004: LOADI R65, 259 ; 3:9 +0005: UPCALL 0, R65 ; 3:5, OUT +0006: JUMP 12 ; 2:4 +0007: LOADI R65, 1 ; 4:1 +0008: JMPF R65, 12 ; 4:1 +0009: LOADI R66, 1 ; 5:9 +0010: LOADI R65, 259 ; 5:9 +0011: UPCALL 0, R65 ; 5:5, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=no$ +``` + +# Test: Execute nested IF blocks + +## Source + +```basic +outer = TRUE +inner = TRUE +IF outer THEN + IF inner THEN + OUT "both" + END IF +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:9 +0001: LOADI R65, 1 ; 2:9 +0002: MOVE R66, R64 ; 3:4 +0003: JMPF R66, 9 ; 3:4 +0004: MOVE R66, R65 ; 4:8 +0005: JMPF R66, 9 ; 4:8 +0006: LOADI R67, 0 ; 5:13 +0007: LOADI R66, 259 ; 5:13 +0008: UPCALL 0, R66 ; 5:9, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=both$ +``` + +# Test: Evaluate nested IF with variables and ELSE + +## Source + +```basic +a = TRUE +b = FALSE +IF a THEN + IF b THEN + OUT "a and b" + ELSE + OUT "only a" + END IF +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 1 ; 1:5 +0001: LOADI R65, 0 ; 2:5 +0002: MOVE R66, R64 ; 3:4 +0003: JMPF R66, 15 ; 3:4 +0004: MOVE R66, R65 ; 4:8 +0005: JMPF R66, 10 ; 4:8 +0006: LOADI R67, 0 ; 5:13 +0007: LOADI R66, 259 ; 5:13 +0008: UPCALL 0, R66 ; 5:9, OUT +0009: JUMP 15 ; 4:8 +0010: LOADI R66, 1 ; 6:5 +0011: JMPF R66, 15 ; 6:5 +0012: LOADI R67, 1 ; 7:13 +0013: LOADI R66, 259 ; 7:13 +0014: UPCALL 0, R66 ; 7:9, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=only a$ +``` + +# Test: Evaluate two IF guards when first guard matches + +## Source + +```basic +n = 3 +IF n = 3 THEN + OUT "match" +END IF +IF n <> 3 THEN + OUT "no match" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:4 +0002: LOADI R66, 3 ; 2:8 +0003: CMPEQI R65, R65, R66 ; 2:6 +0004: JMPF R65, 8 ; 2:4 +0005: LOADI R66, 0 ; 3:9 +0006: LOADI R65, 259 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: MOVE R65, R64 ; 5:4 +0009: LOADI R66, 3 ; 5:9 +0010: CMPNEI R65, R65, R66 ; 5:6 +0011: JMPF R65, 15 ; 5:4 +0012: LOADI R66, 1 ; 6:9 +0013: LOADI R65, 259 ; 6:9 +0014: UPCALL 0, R65 ; 6:5, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=match$ +``` + +# Test: Evaluate two IF guards when second guard matches + +## Source + +```basic +n = 5 +IF n = 3 THEN + OUT "match" +END IF +IF n <> 3 THEN + OUT "no match" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: MOVE R65, R64 ; 2:4 +0002: LOADI R66, 3 ; 2:8 +0003: CMPEQI R65, R65, R66 ; 2:6 +0004: JMPF R65, 8 ; 2:4 +0005: LOADI R66, 0 ; 3:9 +0006: LOADI R65, 259 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: MOVE R65, R64 ; 5:4 +0009: LOADI R66, 3 ; 5:9 +0010: CMPNEI R65, R65, R66 ; 5:6 +0011: JMPF R65, 15 ; 5:4 +0012: LOADI R66, 1 ; 6:9 +0013: LOADI R65, 259 ; 6:9 +0014: UPCALL 0, R65 ; 6:5, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=no match$ +``` + +# Test: Take third ELSEIF branch in multi-branch IF chain + +## Source + +```basic +n = 3 +IF n = 1 THEN + OUT "first" +ELSEIF n = 2 THEN + OUT "second" +ELSEIF n = 3 THEN + OUT "third" +ELSE + OUT "fourth" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:4 +0002: LOADI R66, 1 ; 2:8 +0003: CMPEQI R65, R65, R66 ; 2:6 +0004: JMPF R65, 9 ; 2:4 +0005: LOADI R66, 0 ; 3:9 +0006: LOADI R65, 259 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: JUMP 30 ; 2:4 +0009: MOVE R65, R64 ; 4:8 +0010: LOADI R66, 2 ; 4:12 +0011: CMPEQI R65, R65, R66 ; 4:10 +0012: JMPF R65, 17 ; 4:8 +0013: LOADI R66, 1 ; 5:9 +0014: LOADI R65, 259 ; 5:9 +0015: UPCALL 0, R65 ; 5:5, OUT +0016: JUMP 30 ; 4:8 +0017: MOVE R65, R64 ; 6:8 +0018: LOADI R66, 3 ; 6:12 +0019: CMPEQI R65, R65, R66 ; 6:10 +0020: JMPF R65, 25 ; 6:8 +0021: LOADI R66, 2 ; 7:9 +0022: LOADI R65, 259 ; 7:9 +0023: UPCALL 0, R65 ; 7:5, OUT +0024: JUMP 30 ; 6:8 +0025: LOADI R65, 1 ; 8:1 +0026: JMPF R65, 30 ; 8:1 +0027: LOADI R66, 3 ; 9:9 +0028: LOADI R65, 259 ; 9:9 +0029: UPCALL 0, R65 ; 9:5, OUT +0030: EOF ; 0:0 +``` + +## Output + +```plain +0=third$ +``` + +# Test: Take ELSE branch in multi-branch IF chain + +## Source + +```basic +n = 4 +IF n = 1 THEN + OUT "first" +ELSEIF n = 2 THEN + OUT "second" +ELSEIF n = 3 THEN + OUT "third" +ELSE + OUT "fourth" +END IF +``` + +## Disassembly + +```asm +0000: LOADI R64, 4 ; 1:5 +0001: MOVE R65, R64 ; 2:4 +0002: LOADI R66, 1 ; 2:8 +0003: CMPEQI R65, R65, R66 ; 2:6 +0004: JMPF R65, 9 ; 2:4 +0005: LOADI R66, 0 ; 3:9 +0006: LOADI R65, 259 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: JUMP 30 ; 2:4 +0009: MOVE R65, R64 ; 4:8 +0010: LOADI R66, 2 ; 4:12 +0011: CMPEQI R65, R65, R66 ; 4:10 +0012: JMPF R65, 17 ; 4:8 +0013: LOADI R66, 1 ; 5:9 +0014: LOADI R65, 259 ; 5:9 +0015: UPCALL 0, R65 ; 5:5, OUT +0016: JUMP 30 ; 4:8 +0017: MOVE R65, R64 ; 6:8 +0018: LOADI R66, 3 ; 6:12 +0019: CMPEQI R65, R65, R66 ; 6:10 +0020: JMPF R65, 25 ; 6:8 +0021: LOADI R66, 2 ; 7:9 +0022: LOADI R65, 259 ; 7:9 +0023: UPCALL 0, R65 ; 7:5, OUT +0024: JUMP 30 ; 6:8 +0025: LOADI R65, 1 ; 8:1 +0026: JMPF R65, 30 ; 8:1 +0027: LOADI R66, 3 ; 9:9 +0028: LOADI R65, 259 ; 9:9 +0029: UPCALL 0, R65 ; 9:5, OUT +0030: EOF ; 0:0 +``` + +## Output + +```plain +0=fourth$ +``` + +# Test: Fail when ELSEIF guard is not boolean + +## Source + +```basic +n = 5 +IF n = 3 THEN + OUT "match" +ELSEIF "foo" THEN + OUT "no match" +END IF +``` + +## Compilation errors + +```plain +4:8: Expected BOOLEAN but found STRING +``` + +# Test: Fail on invalid ELSE IF syntax + +## Source + +```basic +IF TRUE THEN +ELSE IF TRUE THEN +END IF +``` + +## Compilation errors + +```plain +2:6: Expecting newline after ELSE +``` + +# Test: Fail on END IF without matching IF + +## Source + +```basic +IF TRUE THEN END IF +``` + +## Compilation errors + +```plain +1:14: END IF without IF +``` + +# Test: Fail when IF condition lacks THEN + +## Source + +```basic +IF 2 +END IF +``` + +## Compilation errors + +```plain +1:5: No THEN in IF statement +``` + +# Test: Fail when TRUE condition lacks THEN + +## Source + +```basic +IF TRUE +END IF +OUT 3 +``` + +## Compilation errors + +```plain +1:8: No THEN in IF statement +``` + +# Test: Fail when IF condition is not boolean + +## Source + +```basic +IF 2 THEN +END IF +``` + +## Compilation errors + +```plain +1:4: Expected BOOLEAN but found INTEGER +``` + +# Test: Fail when ELSEIF condition is not boolean + +## Source + +```basic +IF FALSE THEN +ELSEIF 2 THEN +END IF +``` + +## Compilation errors + +```plain +2:8: Expected BOOLEAN but found INTEGER +``` diff --git a/core2/tests/test_incremental.md b/core2/tests/test_incremental.md new file mode 100644 index 00000000..4293cae3 --- /dev/null +++ b/core2/tests/test_incremental.md @@ -0,0 +1,702 @@ +# Test: Smoke test + +## Source (partial) + +```basic +OUT 1 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=1% +``` + +## Source (partial) + +```basic +OUT 2 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R65, 2 ; 1:5 +0004: LOADI R64, 258 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=2% +``` + +# Test: Program-scope variables persist across compiles + +## Source (partial) + +```basic +a = 3 +OUT a +``` + +## Disassembly (full) + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 258 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=3% +``` + +## Source (partial) + +```basic +OUT a +``` + +## Disassembly (full) + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 258 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: MOVE R66, R64 ; 1:5 +0005: LOADI R65, 258 ; 1:5 +0006: UPCALL 0, R65 ; 1:1, OUT +0007: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=3% +``` + +# Test: Program-scope variables do not leak into functions + +## Source (partial) + +```basic +a = 3 +``` + +## Disassembly (full) + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: EOF ; 0:0 +``` + +## Source (partial) + +```basic +FUNCTION get_a + OUT a +END FUNCTION +``` + +## Compiler errors (partial) + +```plain +2:9: Undefined symbol a +``` + +## Source (partial) + +```basic +OUT a +``` + +## Disassembly (full) + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R66, R64 ; 1:5 +0002: LOADI R65, 258 ; 1:5 +0003: UPCALL 0, R65 ; 1:1, OUT +0004: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=3% +``` + +# Test: User-defined callables are available in later compiles + +## Source (partial) + +```basic +FUNCTION double_it(n AS INTEGER) + double_it = n * 2 +END FUNCTION + +SUB say_hello + OUT "hello" +END SUB +``` + +## Disassembly (full) + +```asm +0000: JUMP 6 ; 1:10 + +;; DOUBLE_IT (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: MOVE R64, R65 ; 2:17 +0003: LOADI R66, 2 ; 2:21 +0004: MULI R64, R64, R66 ; 2:19 +0005: RETURN ; 3:1 +;; DOUBLE_IT (END) + +0006: JUMP 11 ; 5:5 + +;; SAY_HELLO (BEGIN) +0007: LOADI R65, 0 ; 6:9 +0008: LOADI R64, 259 ; 6:9 +0009: UPCALL 0, R64 ; 6:5, OUT +0010: RETURN ; 7:1 +;; SAY_HELLO (END) + +0011: EOF ; 0:0 +``` + +## Source (partial) + +```basic +OUT double_it(4) +say_hello +``` + +## Disassembly (full) + +```asm +0000: JUMP 6 ; 1:10 + +;; DOUBLE_IT (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: MOVE R64, R65 ; 2:17 +0003: LOADI R66, 2 ; 2:21 +0004: MULI R64, R64, R66 ; 2:19 +0005: RETURN ; 3:1 +;; DOUBLE_IT (END) + +0006: JUMP 11 ; 5:5 + +;; SAY_HELLO (BEGIN) +0007: LOADI R65, 0 ; 6:9 +0008: LOADI R64, 259 ; 6:9 +0009: UPCALL 0, R64 ; 6:5, OUT +0010: RETURN ; 7:1 +;; SAY_HELLO (END) + +0011: LOADI R67, 4 ; 1:15 +0012: CALL R66, 1 ; 1:5, DOUBLE_IT +0013: MOVE R65, R66 ; 1:5 +0014: LOADI R64, 258 ; 1:5 +0015: UPCALL 0, R64 ; 1:1, OUT +0016: CALL R64, 7 ; 2:1, SAY_HELLO +0017: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=8% +0=hello$ +``` + +# Test: DATA accumulates across later compiles + +## Source (partial) + +```basic +DATA 1 +``` + +## Disassembly (full) + +```asm +0000: EOF ; 0:0 +``` + +## Source (partial) + +```basic +DATA 2 +GETDATA +``` + +## Disassembly (full) + +```asm +0000: UPCALL 0, R64 ; 2:1, GETDATA +0001: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=1% 1=2% +``` + +## Source (partial) + +```basic +DATA 3 +GETDATA +``` + +## Disassembly (full) + +```asm +0000: UPCALL 0, R64 ; 2:1, GETDATA +0001: UPCALL 0, R64 ; 2:1, GETDATA +0002: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=1% 1=2% 2=3% +``` + +# Test: Failed compile does not define ghost program variables + +## Source (partial) + +```basic +a = 5 +``` + +## Disassembly (full) + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: EOF ; 0:0 +``` + +## Source (partial) + +```basic +c = b + 3 +``` + +## Compiler errors (partial) + +```plain +1:5: Undefined symbol b +``` + +## Source (partial) + +```basic +OUT a, c +``` + +## Compiler errors (partial) + +```plain +1:8: Undefined symbol c +``` + +## Source (partial) + +```basic +OUT a +``` + +## Disassembly (full) + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: MOVE R66, R64 ; 1:5 +0002: LOADI R65, 258 ; 1:5 +0003: UPCALL 0, R65 ; 1:1, OUT +0004: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=5% +``` + +# Test: Failed compile does not define ghost callables + +## Source (partial) + +```basic +FUNCTION stable + stable = 7 +END FUNCTION +``` + +## Disassembly (full) + +```asm +0000: JUMP 4 ; 1:10 + +;; STABLE (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R64, 7 ; 2:14 +0003: RETURN ; 3:1 +;; STABLE (END) + +0004: EOF ; 0:0 +``` + +## Source (partial) + +```basic +FUNCTION broken + broken = missing + 1 +END FUNCTION +``` + +## Compiler errors (partial) + +```plain +2:14: Undefined symbol missing +``` + +## Source (partial) + +```basic +OUT stable, broken +``` + +## Compiler errors (partial) + +```plain +1:13: Undefined symbol broken +``` + +## Source (partial) + +```basic +OUT stable +``` + +## Disassembly (full) + +```asm +0000: JUMP 4 ; 1:10 + +;; STABLE (BEGIN) +0001: LOADI R64, 0 ; 1:10 +0002: LOADI R64, 7 ; 2:14 +0003: RETURN ; 3:1 +;; STABLE (END) + +0004: CALL R65, 1 ; 1:5, STABLE +0005: LOADI R64, 258 ; 1:5 +0006: UPCALL 0, R64 ; 1:1, OUT +0007: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=7% +``` + +# Test: Failed DATA chunk does not taint prior state + +## Source (partial) + +```basic +DATA 9 +``` + +## Disassembly (full) + +```asm +0000: EOF ; 0:0 +``` + +## Source (partial) + +```basic +DATA 1 + 2 +``` + +## Compiler errors (partial) + +```plain +1:8: Expected comma after datum but found + +``` + +## Source (partial) + +```basic +DATA 10 +GETDATA +``` + +## Disassembly (full) + +```asm +0000: UPCALL 0, R64 ; 2:1, GETDATA +0001: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=9% 1=10% +``` + +# Test: Explicit END does not block later compiles + +## Source (partial) + +```basic +OUT 1 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=1% +``` + +## Source (partial) + +```basic +END 3 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R64, 3 ; 1:5 +0004: END R64 ; 1:1 +0005: EOF ; 0:0 +``` + +## Exit code (partial) + +```plain +3 +``` + +## Source (partial) + +```basic +OUT 2 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R64, 3 ; 1:5 +0004: END R64 ; 1:1 +0005: LOADI R65, 2 ; 1:5 +0006: LOADI R64, 258 ; 1:5 +0007: UPCALL 0, R64 ; 1:1, OUT +0008: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=2% +``` + +# Test: Runtime errors do not block later compiles + +## Source (partial) + +```basic +OUT 1 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=1% +``` + +## Source (partial) + +```basic +a = 1 / 0 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R64, 1 ; 1:5 +0004: LOADI R65, 0 ; 1:9 +0005: DIVI R64, R64, R65 ; 1:7 +0006: EOF ; 0:0 +``` + +## Runtime errors (partial) + +```plain +1:7: Division by zero +``` + +## Source (partial) + +```basic +OUT 2 +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R64, 258 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R64, 1 ; 1:5 +0004: LOADI R65, 0 ; 1:9 +0005: DIVI R64, R64, R65 ; 1:7 +0006: LOADI R66, 2 ; 1:5 +0007: LOADI R65, 258 ; 1:5 +0008: UPCALL 0, R65 ; 1:1, OUT +0009: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=2% +``` + +# Test: Labels + +## Source (partial) + +```basic +OUT "before" +a = 0 +@first +a = a + 1 +OUT a +IF a = 5 THEN END +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R64, 259 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R64, 0 ; 2:5 +0004: MOVE R64, R64 ; 4:5 +0005: LOADI R65, 1 ; 4:9 +0006: ADDI R64, R64, R65 ; 4:7 +0007: MOVE R66, R64 ; 5:5 +0008: LOADI R65, 258 ; 5:5 +0009: UPCALL 0, R65 ; 5:1, OUT +0010: MOVE R65, R64 ; 6:4 +0011: LOADI R66, 5 ; 6:8 +0012: CMPEQI R65, R65, R66 ; 6:6 +0013: JMPF R65, 16 ; 6:4 +0014: LOADI R65, 0 ; 6:15 +0015: END R65 ; 6:15 +0016: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=before$ +0=1% +``` + +## Source (partial) + +```basic +GOTO @first +OUT "done" +``` + +## Disassembly (full) + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R64, 259 ; 1:5 +0002: UPCALL 0, R64 ; 1:1, OUT +0003: LOADI R64, 0 ; 2:5 +0004: MOVE R64, R64 ; 4:5 +0005: LOADI R65, 1 ; 4:9 +0006: ADDI R64, R64, R65 ; 4:7 +0007: MOVE R66, R64 ; 5:5 +0008: LOADI R65, 258 ; 5:5 +0009: UPCALL 0, R65 ; 5:1, OUT +0010: MOVE R65, R64 ; 6:4 +0011: LOADI R66, 5 ; 6:8 +0012: CMPEQI R65, R65, R66 ; 6:6 +0013: JMPF R65, 16 ; 6:4 +0014: LOADI R65, 0 ; 6:15 +0015: END R65 ; 6:15 +0016: JUMP 4 ; 1:6 +0017: LOADI R66, 1 ; 2:5 +0018: LOADI R65, 259 ; 2:5 +0019: UPCALL 0, R65 ; 2:1, OUT +0020: EOF ; 0:0 +``` + +## Output (partial) + +```plain +0=2% +0=3% +0=4% +0=5% +``` diff --git a/core2/tests/test_locals.md b/core2/tests/test_locals.md new file mode 100644 index 00000000..4eab94a1 --- /dev/null +++ b/core2/tests/test_locals.md @@ -0,0 +1,59 @@ +# Test: DIM variable with name of a built-in callable + +## Source + +```basic +DIM out AS INTEGER +``` + +## Compilation errors + +```plain +1:5: Cannot redefine out +``` + +# Test: DIM variable with name of a user-defined sub + +## Source + +```basic +SUB foo +END SUB +DIM foo AS INTEGER +``` + +## Compilation errors + +```plain +3:5: Cannot redefine foo +``` + +# Test: Redefine existing scalar with DIM + +## Source + +```basic +DIM a AS INTEGER +DIM a AS INTEGER +``` + +## Compilation errors + +```plain +2:5: Cannot redefine a +``` + +# Test: Redefine existing variable as scalar with DIM + +## Source + +```basic +a = 5 +DIM a AS INTEGER +``` + +## Compilation errors + +```plain +2:5: Cannot redefine a +``` diff --git a/core2/tests/test_on_error.md b/core2/tests/test_on_error.md new file mode 100644 index 00000000..64364c4c --- /dev/null +++ b/core2/tests/test_on_error.md @@ -0,0 +1,395 @@ +# Test: ON ERROR GOTO line + +## Source + +```basic +ON ERROR GOTO 100 +OUT 1 +OUT RAISEF("internal") +OUT 2 +100 OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH JUMP, 12 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R67, 0 ; 3:12 +0005: UPCALL 1, R66 ; 3:5, RAISEF +0006: MOVE R65, R66 ; 3:5 +0007: LOADI R64, 256 ; 3:5 +0008: UPCALL 0, R64 ; 3:1, OUT +0009: LOADI R65, 2 ; 4:5 +0010: LOADI R64, 258 ; 4:5 +0011: UPCALL 0, R64 ; 4:1, OUT +0012: UPCALL 2, R65 ; 5:9, LAST_ERROR +0013: LOADI R64, 259 ; 5:9 +0014: UPCALL 0, R64 ; 5:5, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=3:5: Some internal error$ +``` + +# Test: ON ERROR GOTO label + +## Source + +```basic +ON ERROR GOTO @foo +OUT 1 +OUT RAISEF("internal") +OUT 2 +@foo +OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH JUMP, 12 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R67, 0 ; 3:12 +0005: UPCALL 1, R66 ; 3:5, RAISEF +0006: MOVE R65, R66 ; 3:5 +0007: LOADI R64, 256 ; 3:5 +0008: UPCALL 0, R64 ; 3:1, OUT +0009: LOADI R65, 2 ; 4:5 +0010: LOADI R64, 258 ; 4:5 +0011: UPCALL 0, R64 ; 4:1, OUT +0012: UPCALL 2, R65 ; 6:5, LAST_ERROR +0013: LOADI R64, 259 ; 6:5 +0014: UPCALL 0, R64 ; 6:1, OUT +0015: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=3:5: Some internal error$ +``` + +# Test: ON ERROR reset + +## Source + +```basic +ON ERROR GOTO @foo +OUT 1 +OUT RAISEF("internal") +@foo +ON ERROR GOTO 0 +OUT 2 +OUT RAISEF("internal") +``` + +## Disassembly + +```asm +0000: SETEH JUMP, 9 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R67, 0 ; 3:12 +0005: UPCALL 1, R66 ; 3:5, RAISEF +0006: MOVE R65, R66 ; 3:5 +0007: LOADI R64, 256 ; 3:5 +0008: UPCALL 0, R64 ; 3:1, OUT +0009: SETEH NONE, 0 ; 5:1 +0010: LOADI R65, 2 ; 6:5 +0011: LOADI R64, 258 ; 6:5 +0012: UPCALL 0, R64 ; 6:1, OUT +0013: LOADI R67, 0 ; 7:12 +0014: UPCALL 1, R66 ; 7:5, RAISEF +0015: MOVE R65, R66 ; 7:5 +0016: LOADI R64, 256 ; 7:5 +0017: UPCALL 0, R64 ; 7:1, OUT +0018: EOF ; 0:0 +``` + +## Runtime errors + +```plain +7:5: Some internal error +``` + +## Output + +```plain +0=1% +0=2% +``` + +# Test: ON ERROR RESUME NEXT function failure + +## Source + +```basic +ON ERROR RESUME NEXT +OUT 1 +OUT RAISEF("internal") +OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R67, 0 ; 3:12 +0005: UPCALL 1, R66 ; 3:5, RAISEF +0006: MOVE R65, R66 ; 3:5 +0007: LOADI R64, 256 ; 3:5 +0008: UPCALL 0, R64 ; 3:1, OUT +0009: UPCALL 2, R65 ; 4:5, LAST_ERROR +0010: LOADI R64, 259 ; 4:5 +0011: UPCALL 0, R64 ; 4:1, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=3:5: Some internal error$ +``` + +# Test: ON ERROR RESUME NEXT command failure + +## Source + +```basic +ON ERROR RESUME NEXT +OUT 1 +RAISE "internal" +OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R64, 0 ; 3:7 +0005: UPCALL 1, R64 ; 3:1, RAISE +0006: UPCALL 2, R65 ; 4:5, LAST_ERROR +0007: LOADI R64, 259 ; 4:5 +0008: UPCALL 0, R64 ; 4:1, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=3:1: Some internal error$ +``` + +# Test: ON ERROR RESUME NEXT function failure in statement + +## Source + +```basic +ON ERROR RESUME NEXT +OUT 1: OUT RAISEF("internal"): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R67, 0 ; 2:19 +0005: UPCALL 1, R66 ; 2:12, RAISEF +0006: MOVE R65, R66 ; 2:12 +0007: LOADI R64, 256 ; 2:12 +0008: UPCALL 0, R64 ; 2:8, OUT +0009: UPCALL 2, R65 ; 2:36, LAST_ERROR +0010: LOADI R64, 259 ; 2:36 +0011: UPCALL 0, R64 ; 2:32, OUT +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=2:12: Some internal error$ +``` + +# Test: ON ERROR RESUME NEXT command failure in statement + +## Source + +```basic +ON ERROR RESUME NEXT +OUT 1: RAISE "internal": OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R65, 1 ; 2:5 +0002: LOADI R64, 258 ; 2:5 +0003: UPCALL 0, R64 ; 2:1, OUT +0004: LOADI R64, 0 ; 2:14 +0005: UPCALL 1, R64 ; 2:8, RAISE +0006: UPCALL 2, R65 ; 2:30, LAST_ERROR +0007: LOADI R64, 259 ; 2:30 +0008: UPCALL 0, R64 ; 2:26, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=2:8: Some internal error$ +``` + +# Test: ON ERROR RESUME NEXT argument error + +## Source + +```basic +ON ERROR RESUME NEXT: OUT RAISEF("argument"): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R67, 0 ; 1:34 +0002: UPCALL 0, R66 ; 1:27, RAISEF +0003: MOVE R65, R66 ; 1:27 +0004: LOADI R64, 256 ; 1:27 +0005: UPCALL 1, R64 ; 1:23, OUT +0006: UPCALL 2, R65 ; 1:51, LAST_ERROR +0007: LOADI R64, 259 ; 1:51 +0008: UPCALL 1, R64 ; 1:47, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1:27: Bad argument$ +``` + +# Test: ON ERROR RESUME NEXT eval error + +## Source + +```basic +ON ERROR RESUME NEXT: OUT RAISEF("eval"): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R67, 0 ; 1:34 +0002: UPCALL 0, R66 ; 1:27, RAISEF +0003: MOVE R65, R66 ; 1:27 +0004: LOADI R64, 256 ; 1:27 +0005: UPCALL 1, R64 ; 1:23, OUT +0006: UPCALL 2, R65 ; 1:47, LAST_ERROR +0007: LOADI R64, 259 ; 1:47 +0008: UPCALL 1, R64 ; 1:43, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1:27: Some eval error$ +``` + +# Test: ON ERROR RESUME NEXT internal error + +## Source + +```basic +ON ERROR RESUME NEXT: OUT RAISEF("internal"): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R67, 0 ; 1:34 +0002: UPCALL 0, R66 ; 1:27, RAISEF +0003: MOVE R65, R66 ; 1:27 +0004: LOADI R64, 256 ; 1:27 +0005: UPCALL 1, R64 ; 1:23, OUT +0006: UPCALL 2, R65 ; 1:51, LAST_ERROR +0007: LOADI R64, 259 ; 1:51 +0008: UPCALL 1, R64 ; 1:47, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1:27: Some internal error$ +``` + +# Test: ON ERROR RESUME NEXT I/O error + +## Source + +```basic +ON ERROR RESUME NEXT: OUT RAISEF("io"): OUT LAST_ERROR +``` + +## Disassembly + +```asm +0000: SETEH RESUME_NEXT, 0 ; 1:1 +0001: LOADI R67, 0 ; 1:34 +0002: UPCALL 0, R66 ; 1:27, RAISEF +0003: MOVE R65, R66 ; 1:27 +0004: LOADI R64, 256 ; 1:27 +0005: UPCALL 1, R64 ; 1:23, OUT +0006: UPCALL 2, R65 ; 1:45, LAST_ERROR +0007: LOADI R64, 259 ; 1:45 +0008: UPCALL 1, R64 ; 1:41, OUT +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=1:27: Some I/O error$ +``` + +# Test: ON ERROR GOTO unknown label + +## Source + +```basic +ON ERROR GOTO @foo +``` + +## Compilation errors + +```plain +1:1: Unknown label foo +``` diff --git a/core2/tests/test_out_of_registers.md b/core2/tests/test_out_of_registers.md new file mode 100644 index 00000000..171c8212 --- /dev/null +++ b/core2/tests/test_out_of_registers.md @@ -0,0 +1,345 @@ +# Test: Out of global registers + +## Source + +```basic +DIM SHARED g000 +DIM SHARED g001 +DIM SHARED g002 +DIM SHARED g003 +DIM SHARED g004 +DIM SHARED g005 +DIM SHARED g006 +DIM SHARED g007 +DIM SHARED g008 +DIM SHARED g009 + +DIM SHARED g010 +DIM SHARED g011 +DIM SHARED g012 +DIM SHARED g013 +DIM SHARED g014 +DIM SHARED g015 +DIM SHARED g016 +DIM SHARED g017 +DIM SHARED g018 +DIM SHARED g019 + +DIM SHARED g020 +DIM SHARED g021 +DIM SHARED g022 +DIM SHARED g023 +DIM SHARED g024 +DIM SHARED g025 +DIM SHARED g026 +DIM SHARED g027 +DIM SHARED g028 +DIM SHARED g029 + +DIM SHARED g030 +DIM SHARED g031 +DIM SHARED g032 +DIM SHARED g033 +DIM SHARED g034 +DIM SHARED g035 +DIM SHARED g036 +DIM SHARED g037 +DIM SHARED g038 +DIM SHARED g039 + +DIM SHARED g040 +DIM SHARED g041 +DIM SHARED g042 +DIM SHARED g043 +DIM SHARED g044 +DIM SHARED g045 +DIM SHARED g046 +DIM SHARED g047 +DIM SHARED g048 +DIM SHARED g049 + +DIM SHARED g050 +DIM SHARED g051 +DIM SHARED g052 +DIM SHARED g053 +DIM SHARED g054 +DIM SHARED g055 +DIM SHARED g056 +DIM SHARED g057 +DIM SHARED g058 +DIM SHARED g059 + +DIM SHARED g060 +DIM SHARED g061 +DIM SHARED g062 +DIM SHARED g063 +DIM SHARED g064 +DIM SHARED g065 +DIM SHARED g066 +DIM SHARED g067 +DIM SHARED g068 +DIM SHARED g069 + +DIM SHARED g070 +DIM SHARED g071 +DIM SHARED g072 +DIM SHARED g073 +DIM SHARED g074 +DIM SHARED g075 +DIM SHARED g076 +DIM SHARED g077 +DIM SHARED g078 +DIM SHARED g079 +``` + +## Compilation errors + +```plain +71:12: Out of global registers +``` + +# Test: Out of local registers + +## Source + +```basic +l000 = 0 +l001 = 0 +l002 = 0 +l003 = 0 +l004 = 0 +l005 = 0 +l006 = 0 +l007 = 0 +l008 = 0 +l009 = 0 + +l010 = 0 +l011 = 0 +l012 = 0 +l013 = 0 +l014 = 0 +l015 = 0 +l016 = 0 +l017 = 0 +l018 = 0 +l019 = 0 + +l020 = 0 +l021 = 0 +l022 = 0 +l023 = 0 +l024 = 0 +l025 = 0 +l026 = 0 +l027 = 0 +l028 = 0 +l029 = 0 + +l030 = 0 +l031 = 0 +l032 = 0 +l033 = 0 +l034 = 0 +l035 = 0 +l036 = 0 +l037 = 0 +l038 = 0 +l039 = 0 + +l040 = 0 +l041 = 0 +l042 = 0 +l043 = 0 +l044 = 0 +l045 = 0 +l046 = 0 +l047 = 0 +l048 = 0 +l049 = 0 + +l050 = 0 +l051 = 0 +l052 = 0 +l053 = 0 +l054 = 0 +l055 = 0 +l056 = 0 +l057 = 0 +l058 = 0 +l059 = 0 + +l060 = 0 +l061 = 0 +l062 = 0 +l063 = 0 +l064 = 0 +l065 = 0 +l066 = 0 +l067 = 0 +l068 = 0 +l069 = 0 + +l070 = 0 +l071 = 0 +l072 = 0 +l073 = 0 +l074 = 0 +l075 = 0 +l076 = 0 +l077 = 0 +l078 = 0 +l079 = 0 + +l080 = 0 +l081 = 0 +l082 = 0 +l083 = 0 +l084 = 0 +l085 = 0 +l086 = 0 +l087 = 0 +l088 = 0 +l089 = 0 + +l090 = 0 +l091 = 0 +l092 = 0 +l093 = 0 +l094 = 0 +l095 = 0 +l096 = 0 +l097 = 0 +l098 = 0 +l099 = 0 + +l100 = 0 +l101 = 0 +l102 = 0 +l103 = 0 +l104 = 0 +l105 = 0 +l106 = 0 +l107 = 0 +l108 = 0 +l109 = 0 + +l110 = 0 +l111 = 0 +l112 = 0 +l113 = 0 +l114 = 0 +l115 = 0 +l116 = 0 +l117 = 0 +l118 = 0 +l119 = 0 + +l120 = 0 +l121 = 0 +l122 = 0 +l123 = 0 +l124 = 0 +l125 = 0 +l126 = 0 +l127 = 0 +l128 = 0 +l129 = 0 + +l130 = 0 +l131 = 0 +l132 = 0 +l133 = 0 +l134 = 0 +l135 = 0 +l136 = 0 +l137 = 0 +l138 = 0 +l139 = 0 + +l140 = 0 +l141 = 0 +l142 = 0 +l143 = 0 +l144 = 0 +l145 = 0 +l146 = 0 +l147 = 0 +l148 = 0 +l149 = 0 + +l150 = 0 +l151 = 0 +l152 = 0 +l153 = 0 +l154 = 0 +l155 = 0 +l156 = 0 +l157 = 0 +l158 = 0 +l159 = 0 + +l160 = 0 +l161 = 0 +l162 = 0 +l163 = 0 +l164 = 0 +l165 = 0 +l166 = 0 +l167 = 0 +l168 = 0 +l169 = 0 + +l170 = 0 +l171 = 0 +l172 = 0 +l173 = 0 +l174 = 0 +l175 = 0 +l176 = 0 +l177 = 0 +l178 = 0 +l179 = 0 + +l180 = 0 +l181 = 0 +l182 = 0 +l183 = 0 +l184 = 0 +l185 = 0 +l186 = 0 +l187 = 0 +l188 = 0 +l189 = 0 + +l190 = 0 +l191 = 0 +l192 = 0 +l193 = 0 +l194 = 0 +l195 = 0 +l196 = 0 +l197 = 0 +l198 = 0 +l199 = 0 +``` + +## Compilation errors + +```plain +212:1: Out of local registers +``` + +# Test: Out of temporary registers + +## Source + +```basic +a = SUM_INTEGERS(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96) +``` + +## Compilation errors + +```plain +1:389: Out of temp registers +``` diff --git a/core2/tests/test_relational_eq.md b/core2/tests/test_relational_eq.md new file mode 100644 index 00000000..7fe57b1a --- /dev/null +++ b/core2/tests/test_relational_eq.md @@ -0,0 +1,139 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 2 = 2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADI R66, 2 ; 1:9 +0002: CMPEQI R65, R65, R66 ; 1:7 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.5 = 2.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: CMPEQD R65, R65, R66 ; 1:9 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 = 2.0 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: CMPEQD R65, R65, R66 ; 1:7 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate strings + +## Source + +```basic +OUT "foo" = "bar" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:13 +0002: CMPEQS R65, R65, R66 ; 1:11 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Two immediate booleans + +## Source + +```basic +OUT TRUE = FALSE +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 0 ; 1:12 +0002: CMPEQB R65, R65, R66 ; 1:10 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Type error between integer and string + +## Source + +```basic +OUT 1 = "1" +``` + +## Compilation errors + +```plain +1:7: Cannot = INTEGER and STRING +``` diff --git a/core2/tests/test_relational_ge.md b/core2/tests/test_relational_ge.md new file mode 100644 index 00000000..fa96730a --- /dev/null +++ b/core2/tests/test_relational_ge.md @@ -0,0 +1,114 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 3 >= 2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:5 +0001: LOADI R66, 2 ; 1:10 +0002: CMPGEI R65, R65, R66 ; 1:7 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.5 >= 2.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:12 +0002: CMPGED R65, R65, R66 ; 1:9 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 >= 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:10 +0002: ITOD R65 ; 1:7 +0003: CMPGED R65, R65, R66 ; 1:7 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Two immediate strings + +## Source + +```basic +OUT "foo" >= "bar" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:14 +0002: CMPGES R65, R65, R66 ; 1:11 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Type error with boolean + +## Source + +```basic +OUT TRUE >= FALSE +``` + +## Compilation errors + +```plain +1:10: Cannot >= BOOLEAN and BOOLEAN +``` diff --git a/core2/tests/test_relational_gt.md b/core2/tests/test_relational_gt.md new file mode 100644 index 00000000..426e2636 --- /dev/null +++ b/core2/tests/test_relational_gt.md @@ -0,0 +1,114 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 3 > 2 +``` + +## Disassembly + +```asm +0000: LOADI R65, 3 ; 1:5 +0001: LOADI R66, 2 ; 1:9 +0002: CMPGTI R65, R65, R66 ; 1:7 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.5 > 2.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: CMPGTD R65, R65, R66 ; 1:9 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 > 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: CMPGTD R65, R65, R66 ; 1:7 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Two immediate strings + +## Source + +```basic +OUT "foo" > "bar" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:13 +0002: CMPGTS R65, R65, R66 ; 1:11 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Type error with boolean + +## Source + +```basic +OUT TRUE > FALSE +``` + +## Compilation errors + +```plain +1:10: Cannot > BOOLEAN and BOOLEAN +``` diff --git a/core2/tests/test_relational_le.md b/core2/tests/test_relational_le.md new file mode 100644 index 00000000..6a748b4e --- /dev/null +++ b/core2/tests/test_relational_le.md @@ -0,0 +1,114 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 2 <= 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADI R66, 3 ; 1:10 +0002: CMPLEI R65, R65, R66 ; 1:7 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.5 <= 2.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:12 +0002: CMPLED R65, R65, R66 ; 1:9 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 <= 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:10 +0002: ITOD R65 ; 1:7 +0003: CMPLED R65, R65, R66 ; 1:7 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate strings + +## Source + +```basic +OUT "foo" <= "bar" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:14 +0002: CMPLES R65, R65, R66 ; 1:11 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Type error with boolean + +## Source + +```basic +OUT TRUE <= FALSE +``` + +## Compilation errors + +```plain +1:10: Cannot <= BOOLEAN and BOOLEAN +``` diff --git a/core2/tests/test_relational_lt.md b/core2/tests/test_relational_lt.md new file mode 100644 index 00000000..c0e543df --- /dev/null +++ b/core2/tests/test_relational_lt.md @@ -0,0 +1,114 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 2 < 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADI R66, 3 ; 1:9 +0002: CMPLTI R65, R65, R66 ; 1:7 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.5 < 2.0 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 1 ; 1:11 +0002: CMPLTD R65, R65, R66 ; 1:9 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 < 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:9 +0002: ITOD R65 ; 1:7 +0003: CMPLTD R65, R65, R66 ; 1:7 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate strings + +## Source + +```basic +OUT "foo" < "bar" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:13 +0002: CMPLTS R65, R65, R66 ; 1:11 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Type error with boolean + +## Source + +```basic +OUT TRUE < FALSE +``` + +## Compilation errors + +```plain +1:10: Cannot < BOOLEAN and BOOLEAN +``` diff --git a/core2/tests/test_relational_ne.md b/core2/tests/test_relational_ne.md new file mode 100644 index 00000000..4295aa38 --- /dev/null +++ b/core2/tests/test_relational_ne.md @@ -0,0 +1,139 @@ +# Test: Two immediate integers + +## Source + +```basic +OUT 2 <> 3 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADI R66, 3 ; 1:10 +0002: CMPNEI R65, R65, R66 ; 1:7 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate doubles + +## Source + +```basic +OUT 2.5 <> 2.5 +``` + +## Disassembly + +```asm +0000: LOADC R65, 0 ; 1:5 +0001: LOADC R66, 0 ; 1:12 +0002: CMPNED R65, R65, R66 ; 1:9 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=false? +``` + +# Test: Left integer operand needs type promotion to double + +## Source + +```basic +OUT 2 <> 2.5 +``` + +## Disassembly + +```asm +0000: LOADI R65, 2 ; 1:5 +0001: LOADC R66, 0 ; 1:10 +0002: ITOD R65 ; 1:7 +0003: CMPNED R65, R65, R66 ; 1:7 +0004: LOADI R64, 256 ; 1:5 +0005: UPCALL 0, R64 ; 1:1, OUT +0006: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate strings + +## Source + +```basic +OUT "foo" <> "bar" +``` + +## Disassembly + +```asm +0000: LOADI R65, 0 ; 1:5 +0001: LOADI R66, 1 ; 1:14 +0002: CMPNES R65, R65, R66 ; 1:11 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Two immediate booleans + +## Source + +```basic +OUT TRUE <> FALSE +``` + +## Disassembly + +```asm +0000: LOADI R65, 1 ; 1:5 +0001: LOADI R66, 0 ; 1:13 +0002: CMPNEB R65, R65, R66 ; 1:10 +0003: LOADI R64, 256 ; 1:5 +0004: UPCALL 0, R64 ; 1:1, OUT +0005: EOF ; 0:0 +``` + +## Output + +```plain +0=true? +``` + +# Test: Type error between integer and string + +## Source + +```basic +OUT 1 <> "1" +``` + +## Compilation errors + +```plain +1:7: Cannot <> INTEGER and STRING +``` diff --git a/core2/tests/test_select.md b/core2/tests/test_select.md new file mode 100644 index 00000000..d57868da --- /dev/null +++ b/core2/tests/test_select.md @@ -0,0 +1,623 @@ +# Test: Basic SELECT CASE matching + +## Source + +```basic +n = 3 +SELECT CASE n + CASE 1, 3, 5, 7, 9 + OUT "odd" + CASE 0, 2, 4, 6, 8 + OUT "even" + CASE 10 TO 20 + OUT "large" + CASE IS < 0 + OUT "negative" + CASE ELSE + OUT "too large" +END SELECT +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADI R67, 1 ; 3:10 +0004: CMPEQI R68, R66, R67 ; 3:10 +0005: JMPF R68, 7 ; 3:10 +0006: JUMP 72 ; 3:10 +0007: MOVE R66, R65 ; 3:13 +0008: LOADI R67, 3 ; 3:13 +0009: CMPEQI R68, R66, R67 ; 3:13 +0010: JMPF R68, 12 ; 3:13 +0011: JUMP 72 ; 3:13 +0012: MOVE R66, R65 ; 3:16 +0013: LOADI R67, 5 ; 3:16 +0014: CMPEQI R68, R66, R67 ; 3:16 +0015: JMPF R68, 17 ; 3:16 +0016: JUMP 72 ; 3:16 +0017: MOVE R66, R65 ; 3:19 +0018: LOADI R67, 7 ; 3:19 +0019: CMPEQI R68, R66, R67 ; 3:19 +0020: JMPF R68, 22 ; 3:19 +0021: JUMP 72 ; 3:19 +0022: MOVE R66, R65 ; 3:22 +0023: LOADI R67, 9 ; 3:22 +0024: CMPEQI R68, R66, R67 ; 3:22 +0025: JMPF R68, 27 ; 3:22 +0026: JUMP 72 ; 3:22 +0027: JUMP 28 ; 13:1 +0028: MOVE R66, R65 ; 5:10 +0029: LOADI R67, 0 ; 5:10 +0030: CMPEQI R68, R66, R67 ; 5:10 +0031: JMPF R68, 33 ; 5:10 +0032: JUMP 76 ; 5:10 +0033: MOVE R66, R65 ; 5:13 +0034: LOADI R67, 2 ; 5:13 +0035: CMPEQI R68, R66, R67 ; 5:13 +0036: JMPF R68, 38 ; 5:13 +0037: JUMP 76 ; 5:13 +0038: MOVE R66, R65 ; 5:16 +0039: LOADI R67, 4 ; 5:16 +0040: CMPEQI R68, R66, R67 ; 5:16 +0041: JMPF R68, 43 ; 5:16 +0042: JUMP 76 ; 5:16 +0043: MOVE R66, R65 ; 5:19 +0044: LOADI R67, 6 ; 5:19 +0045: CMPEQI R68, R66, R67 ; 5:19 +0046: JMPF R68, 48 ; 5:19 +0047: JUMP 76 ; 5:19 +0048: MOVE R66, R65 ; 5:22 +0049: LOADI R67, 8 ; 5:22 +0050: CMPEQI R68, R66, R67 ; 5:22 +0051: JMPF R68, 53 ; 5:22 +0052: JUMP 76 ; 5:22 +0053: JUMP 54 ; 13:1 +0054: MOVE R66, R65 ; 7:10 +0055: LOADI R67, 10 ; 7:10 +0056: CMPGEI R68, R66, R67 ; 7:10 +0057: MOVE R69, R65 ; 7:10 +0058: LOADI R70, 20 ; 7:16 +0059: CMPLEI R71, R69, R70 ; 7:10 +0060: AND R72, R68, R71 ; 7:10 +0061: JMPF R72, 63 ; 7:10 +0062: JUMP 80 ; 7:10 +0063: JUMP 64 ; 13:1 +0064: MOVE R66, R65 ; 9:15 +0065: LOADI R67, 0 ; 9:15 +0066: CMPLTI R68, R66, R67 ; 9:15 +0067: JMPF R68, 69 ; 9:15 +0068: JUMP 84 ; 9:15 +0069: JUMP 70 ; 13:1 +0070: JUMP 88 ; 13:1 +0071: JUMP 91 ; 13:1 +0072: LOADI R66, 0 ; 4:13 +0073: LOADI R65, 259 ; 4:13 +0074: UPCALL 0, R65 ; 4:9, OUT +0075: JUMP 91 ; 13:1 +0076: LOADI R66, 1 ; 6:13 +0077: LOADI R65, 259 ; 6:13 +0078: UPCALL 0, R65 ; 6:9, OUT +0079: JUMP 91 ; 13:1 +0080: LOADI R66, 2 ; 8:13 +0081: LOADI R65, 259 ; 8:13 +0082: UPCALL 0, R65 ; 8:9, OUT +0083: JUMP 91 ; 13:1 +0084: LOADI R66, 3 ; 10:13 +0085: LOADI R65, 259 ; 10:13 +0086: UPCALL 0, R65 ; 10:9, OUT +0087: JUMP 91 ; 13:1 +0088: LOADI R66, 4 ; 12:13 +0089: LOADI R65, 259 ; 12:13 +0090: UPCALL 0, R65 ; 12:9, OUT +0091: EOF ; 0:0 +``` + +## Output + +```plain +0=odd$ +``` + +# Test: CASE ELSE fallback + +## Source + +```basic +n = 21 +SELECT CASE n + CASE 1 + OUT "one" + CASE ELSE + OUT "fallback" +END SELECT +``` + +## Disassembly + +```asm +0000: LOADI R64, 21 ; 1:5 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADI R67, 1 ; 3:10 +0004: CMPEQI R68, R66, R67 ; 3:10 +0005: JMPF R68, 7 ; 3:10 +0006: JUMP 10 ; 3:10 +0007: JUMP 8 ; 7:1 +0008: JUMP 14 ; 7:1 +0009: JUMP 17 ; 7:1 +0010: LOADI R66, 0 ; 4:13 +0011: LOADI R65, 259 ; 4:13 +0012: UPCALL 0, R65 ; 4:9, OUT +0013: JUMP 17 ; 7:1 +0014: LOADI R66, 1 ; 6:13 +0015: LOADI R65, 259 ; 6:13 +0016: UPCALL 0, R65 ; 6:9, OUT +0017: EOF ; 0:0 +``` + +## Output + +```plain +0=fallback$ +``` + +# Test: SELECT test expression evaluated once + +## Source + +```basic +SELECT CASE MEANING_OF_LIFE + 1 + CASE 43 + OUT "ok" + CASE 100 + OUT "nope" +END SELECT +``` + +## Disassembly + +```asm +0000: UPCALL 0, R64 ; 1:13, MEANING_OF_LIFE +0001: LOADI R65, 1 ; 1:31 +0002: ADDI R64, R64, R65 ; 1:29 +0003: MOVE R65, R64 ; 2:10 +0004: LOADI R66, 43 ; 2:10 +0005: CMPEQI R67, R65, R66 ; 2:10 +0006: JMPF R67, 8 ; 2:10 +0007: JUMP 16 ; 2:10 +0008: JUMP 9 ; 6:1 +0009: MOVE R65, R64 ; 4:10 +0010: LOADI R66, 100 ; 4:10 +0011: CMPEQI R67, R65, R66 ; 4:10 +0012: JMPF R67, 14 ; 4:10 +0013: JUMP 20 ; 4:10 +0014: JUMP 15 ; 6:1 +0015: JUMP 23 ; 6:1 +0016: LOADI R65, 0 ; 3:13 +0017: LOADI R64, 259 ; 3:13 +0018: UPCALL 1, R64 ; 3:9, OUT +0019: JUMP 23 ; 6:1 +0020: LOADI R65, 1 ; 5:13 +0021: LOADI R64, 259 ; 5:13 +0022: UPCALL 1, R64 ; 5:9, OUT +0023: EOF ; 0:0 +``` + +## Output + +```plain +0=ok$ +``` + +# Test: SELECT with no cases still evaluates expression once + +## Source + +```basic +SELECT CASE MEANING_OF_LIFE + 1 +END SELECT +``` + +## Disassembly + +```asm +0000: UPCALL 0, R64 ; 1:13, MEANING_OF_LIFE +0001: LOADI R65, 1 ; 1:31 +0002: ADDI R64, R64, R65 ; 1:29 +0003: JUMP 4 ; 2:1 +0004: EOF ; 0:0 +``` + +# Test: CASE IS and TO with strings + +## Source + +```basic +s = "M" +SELECT CASE s + CASE "exact" + OUT "exact" + CASE IS > "ZZZ" + OUT "is" + CASE "B" TO "Y" + OUT "to" +END SELECT +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:5 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADI R67, 1 ; 3:10 +0004: CMPEQS R68, R66, R67 ; 3:10 +0005: JMPF R68, 7 ; 3:10 +0006: JUMP 25 ; 3:10 +0007: JUMP 8 ; 9:1 +0008: MOVE R66, R65 ; 5:15 +0009: LOADI R67, 2 ; 5:15 +0010: CMPGTS R68, R66, R67 ; 5:15 +0011: JMPF R68, 13 ; 5:15 +0012: JUMP 29 ; 5:15 +0013: JUMP 14 ; 9:1 +0014: MOVE R66, R65 ; 7:10 +0015: LOADI R67, 3 ; 7:10 +0016: CMPGES R68, R66, R67 ; 7:10 +0017: MOVE R69, R65 ; 7:10 +0018: LOADI R70, 4 ; 7:17 +0019: CMPLES R71, R69, R70 ; 7:10 +0020: AND R72, R68, R71 ; 7:10 +0021: JMPF R72, 23 ; 7:10 +0022: JUMP 33 ; 7:10 +0023: JUMP 24 ; 9:1 +0024: JUMP 36 ; 9:1 +0025: LOADI R66, 1 ; 4:13 +0026: LOADI R65, 259 ; 4:13 +0027: UPCALL 0, R65 ; 4:9, OUT +0028: JUMP 36 ; 9:1 +0029: LOADI R66, 5 ; 6:13 +0030: LOADI R65, 259 ; 6:13 +0031: UPCALL 0, R65 ; 6:9, OUT +0032: JUMP 36 ; 9:1 +0033: LOADI R66, 6 ; 8:13 +0034: LOADI R65, 259 ; 8:13 +0035: UPCALL 0, R65 ; 8:9, OUT +0036: EOF ; 0:0 +``` + +## Output + +```plain +0=to$ +``` + +# Test: DOUBLE test expression compared against INTEGER guards + +## Source + +```basic +n# = 5.1 +SELECT CASE n# + CASE 2 + OUT "bad" + CASE IS > 5 + OUT "ok" +END SELECT +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:6 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADI R67, 2 ; 3:10 +0004: ITOD R67 ; 3:10 +0005: CMPEQD R68, R66, R67 ; 3:10 +0006: JMPF R68, 8 ; 3:10 +0007: JUMP 17 ; 3:10 +0008: JUMP 9 ; 7:1 +0009: MOVE R66, R65 ; 5:15 +0010: LOADI R67, 5 ; 5:15 +0011: ITOD R67 ; 5:15 +0012: CMPGTD R68, R66, R67 ; 5:15 +0013: JMPF R68, 15 ; 5:15 +0014: JUMP 21 ; 5:15 +0015: JUMP 16 ; 7:1 +0016: JUMP 24 ; 7:1 +0017: LOADI R66, 1 ; 4:13 +0018: LOADI R65, 259 ; 4:13 +0019: UPCALL 0, R65 ; 4:9, OUT +0020: JUMP 24 ; 7:1 +0021: LOADI R66, 2 ; 6:13 +0022: LOADI R65, 259 ; 6:13 +0023: UPCALL 0, R65 ; 6:9, OUT +0024: EOF ; 0:0 +``` + +## Output + +```plain +0=ok$ +``` + +# Test: INTEGER test expression compared against DOUBLE guards + +## Source + +```basic +n = 11 +SELECT CASE n + CASE 2.0 + OUT "bad" + CASE 5.0, -1.0 + OUT "bad" + CASE 10.2 TO 11.8 + OUT "ok" +END SELECT +``` + +## Disassembly + +```asm +0000: LOADI R64, 11 ; 1:5 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADC R67, 0 ; 3:10 +0004: ITOD R66 ; 3:10 +0005: CMPEQD R68, R66, R67 ; 3:10 +0006: JMPF R68, 8 ; 3:10 +0007: JUMP 36 ; 3:10 +0008: JUMP 9 ; 9:1 +0009: MOVE R66, R65 ; 5:10 +0010: LOADC R67, 1 ; 5:10 +0011: ITOD R66 ; 5:10 +0012: CMPEQD R68, R66, R67 ; 5:10 +0013: JMPF R68, 15 ; 5:10 +0014: JUMP 40 ; 5:10 +0015: MOVE R66, R65 ; 5:15 +0016: LOADC R67, 2 ; 5:16 +0017: NEGD R67 ; 5:15 +0018: ITOD R66 ; 5:15 +0019: CMPEQD R68, R66, R67 ; 5:15 +0020: JMPF R68, 22 ; 5:15 +0021: JUMP 40 ; 5:15 +0022: JUMP 23 ; 9:1 +0023: MOVE R66, R65 ; 7:10 +0024: LOADC R67, 3 ; 7:10 +0025: ITOD R66 ; 7:10 +0026: CMPGED R68, R66, R67 ; 7:10 +0027: MOVE R69, R65 ; 7:10 +0028: LOADC R70, 4 ; 7:18 +0029: ITOD R69 ; 7:10 +0030: CMPLED R71, R69, R70 ; 7:10 +0031: AND R72, R68, R71 ; 7:10 +0032: JMPF R72, 34 ; 7:10 +0033: JUMP 44 ; 7:10 +0034: JUMP 35 ; 9:1 +0035: JUMP 47 ; 9:1 +0036: LOADI R66, 5 ; 4:13 +0037: LOADI R65, 259 ; 4:13 +0038: UPCALL 0, R65 ; 4:9, OUT +0039: JUMP 47 ; 9:1 +0040: LOADI R66, 5 ; 6:13 +0041: LOADI R65, 259 ; 6:13 +0042: UPCALL 0, R65 ; 6:9, OUT +0043: JUMP 47 ; 9:1 +0044: LOADI R66, 6 ; 8:13 +0045: LOADI R65, 259 ; 8:13 +0046: UPCALL 0, R65 ; 8:9, OUT +0047: EOF ; 0:0 +``` + +## Output + +```plain +0=ok$ +``` + +# Test: Nested SELECT blocks + +## Source + +```basic +i = 5 +SELECT CASE i + CASE 5 + OUT "ok 1" + i = 6 + SELECT CASE i + CASE 6 + OUT "ok 2" + END SELECT + CASE 6 + OUT "not ok" +END SELECT +``` + +## Disassembly + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADI R67, 5 ; 3:10 +0004: CMPEQI R68, R66, R67 ; 3:10 +0005: JMPF R68, 7 ; 3:10 +0006: JUMP 15 ; 3:10 +0007: JUMP 8 ; 12:1 +0008: MOVE R66, R65 ; 10:10 +0009: LOADI R67, 6 ; 10:10 +0010: CMPEQI R68, R66, R67 ; 10:10 +0011: JMPF R68, 13 ; 10:10 +0012: JUMP 31 ; 10:10 +0013: JUMP 14 ; 12:1 +0014: JUMP 34 ; 12:1 +0015: LOADI R66, 0 ; 4:13 +0016: LOADI R65, 259 ; 4:13 +0017: UPCALL 0, R65 ; 4:9, OUT +0018: LOADI R64, 6 ; 5:13 +0019: MOVE R65, R64 ; 6:21 +0020: MOVE R66, R65 ; 7:18 +0021: LOADI R67, 6 ; 7:18 +0022: CMPEQI R68, R66, R67 ; 7:18 +0023: JMPF R68, 25 ; 7:18 +0024: JUMP 27 ; 7:18 +0025: JUMP 26 ; 9:9 +0026: JUMP 30 ; 9:9 +0027: LOADI R66, 1 ; 8:21 +0028: LOADI R65, 259 ; 8:21 +0029: UPCALL 0, R65 ; 8:17, OUT +0030: JUMP 34 ; 12:1 +0031: LOADI R66, 2 ; 11:13 +0032: LOADI R65, 259 ; 11:13 +0033: UPCALL 0, R65 ; 11:9, OUT +0034: EOF ; 0:0 +``` + +## Output + +```plain +0=ok 1$ +0=ok 2$ +``` + +# Test: SELECT nested indirectly through GOSUB + +## Source + +```basic +i = 5 +SELECT CASE i + CASE 5 + OUT "ok 1" + GOSUB @another + CASE 6 + OUT "not ok" +END SELECT +GOTO @end +@another +i = 6 +SELECT CASE i + CASE 6 + OUT "ok 2" +END SELECT +RETURN +@end +``` + +## Disassembly + +```asm +0000: LOADI R64, 5 ; 1:5 +0001: MOVE R65, R64 ; 2:13 +0002: MOVE R66, R65 ; 3:10 +0003: LOADI R67, 5 ; 3:10 +0004: CMPEQI R68, R66, R67 ; 3:10 +0005: JMPF R68, 7 ; 3:10 +0006: JUMP 15 ; 3:10 +0007: JUMP 8 ; 8:1 +0008: MOVE R66, R65 ; 6:10 +0009: LOADI R67, 6 ; 6:10 +0010: CMPEQI R68, R66, R67 ; 6:10 +0011: JMPF R68, 13 ; 6:10 +0012: JUMP 20 ; 6:10 +0013: JUMP 14 ; 8:1 +0014: JUMP 23 ; 8:1 +0015: LOADI R66, 0 ; 4:13 +0016: LOADI R65, 259 ; 4:13 +0017: UPCALL 0, R65 ; 4:9, OUT +0018: GOSUB 24 ; 5:15 +0019: JUMP 23 ; 8:1 +0020: LOADI R66, 1 ; 7:13 +0021: LOADI R65, 259 ; 7:13 +0022: UPCALL 0, R65 ; 7:9, OUT +0023: JUMP 37 ; 9:6 +0024: LOADI R64, 6 ; 11:5 +0025: MOVE R65, R64 ; 12:13 +0026: MOVE R66, R65 ; 13:10 +0027: LOADI R67, 6 ; 13:10 +0028: CMPEQI R68, R66, R67 ; 13:10 +0029: JMPF R68, 31 ; 13:10 +0030: JUMP 33 ; 13:10 +0031: JUMP 32 ; 15:1 +0032: JUMP 36 ; 15:1 +0033: LOADI R66, 2 ; 14:13 +0034: LOADI R65, 259 ; 14:13 +0035: UPCALL 0, R65 ; 14:9, OUT +0036: RETURN ; 16:1 +0037: EOF ; 0:0 +``` + +## Output + +```plain +0=ok 1$ +0=ok 2$ +``` + +# Test: CASE guard type mismatch + +## Source + +```basic +SELECT CASE 2 + CASE FALSE +END SELECT +``` + +## Compilation errors + +```plain +2:10: Cannot = INTEGER and BOOLEAN +``` + +# Test: SELECT with no matching CASE + +## Source + +```basic +SELECT CASE 42 + CASE 1 + OUT "unexpected" + CASE 2 +END SELECT +OUT "done" +``` + +## Disassembly + +```asm +0000: LOADI R64, 42 ; 1:13 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 1 ; 2:10 +0003: CMPEQI R67, R65, R66 ; 2:10 +0004: JMPF R67, 6 ; 2:10 +0005: JUMP 14 ; 2:10 +0006: JUMP 7 ; 5:1 +0007: MOVE R65, R64 ; 4:10 +0008: LOADI R66, 2 ; 4:10 +0009: CMPEQI R67, R65, R66 ; 4:10 +0010: JMPF R67, 12 ; 4:10 +0011: JUMP 18 ; 4:10 +0012: JUMP 13 ; 5:1 +0013: JUMP 18 ; 5:1 +0014: LOADI R65, 0 ; 3:13 +0015: LOADI R64, 259 ; 3:13 +0016: UPCALL 0, R64 ; 3:9, OUT +0017: JUMP 18 ; 5:1 +0018: LOADI R65, 1 ; 6:5 +0019: LOADI R64, 259 ; 6:5 +0020: UPCALL 0, R64 ; 6:1, OUT +0021: EOF ; 0:0 +``` + +## Output + +```plain +0=done$ +``` diff --git a/core2/tests/test_strings.md b/core2/tests/test_strings.md new file mode 100644 index 00000000..9e29ce9c --- /dev/null +++ b/core2/tests/test_strings.md @@ -0,0 +1,51 @@ +# Test: Concatenation + +## Source + +```basic +c1 = "Constant string 1" +c2 = "Constant string 2" + +c3 = c1 + c2 +c4 = c3 + "." + +OUT c1 +OUT c2 +OUT c3 +OUT c4 +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:6 +0001: LOADI R65, 1 ; 2:6 +0002: MOVE R66, R64 ; 4:6 +0003: MOVE R67, R65 ; 4:11 +0004: CONCAT R66, R66, R67 ; 4:9 +0005: MOVE R67, R66 ; 5:6 +0006: LOADI R68, 2 ; 5:11 +0007: CONCAT R67, R67, R68 ; 5:9 +0008: MOVE R69, R64 ; 7:5 +0009: LOADI R68, 259 ; 7:5 +0010: UPCALL 0, R68 ; 7:1, OUT +0011: MOVE R69, R65 ; 8:5 +0012: LOADI R68, 259 ; 8:5 +0013: UPCALL 0, R68 ; 8:1, OUT +0014: MOVE R69, R66 ; 9:5 +0015: LOADI R68, 259 ; 9:5 +0016: UPCALL 0, R68 ; 9:1, OUT +0017: MOVE R69, R67 ; 10:5 +0018: LOADI R68, 259 ; 10:5 +0019: UPCALL 0, R68 ; 10:1, OUT +0020: EOF ; 0:0 +``` + +## Output + +```plain +0=Constant string 1$ +0=Constant string 2$ +0=Constant string 1Constant string 2$ +0=Constant string 1Constant string 2.$ +``` diff --git a/core2/tests/test_subs.md b/core2/tests/test_subs.md new file mode 100644 index 00000000..ea305495 --- /dev/null +++ b/core2/tests/test_subs.md @@ -0,0 +1,716 @@ +# Test: Elaborate execution flow + +## Source + +```basic +a = 10 + +SUB foo + a = 20 + OUT "Inside", a +END SUB + +OUT "Before", a +foo +OUT "After", a +``` + +## Disassembly + +```asm +0000: LOADI R64, 10 ; 1:5 +0001: JUMP 9 ; 3:5 + +;; FOO (BEGIN) +0002: LOADI R64, 20 ; 4:9 +0003: LOADI R66, 0 ; 5:9 +0004: LOADI R65, 291 ; 5:9 +0005: MOVE R68, R64 ; 5:19 +0006: LOADI R67, 258 ; 5:19 +0007: UPCALL 0, R65 ; 5:5, OUT +0008: RETURN ; 6:1 +;; FOO (END) + +0009: LOADI R66, 1 ; 8:5 +0010: LOADI R65, 291 ; 8:5 +0011: MOVE R68, R64 ; 8:15 +0012: LOADI R67, 258 ; 8:15 +0013: UPCALL 0, R65 ; 8:1, OUT +0014: CALL R65, 2 ; 9:1, FOO +0015: LOADI R66, 2 ; 10:5 +0016: LOADI R65, 291 ; 10:5 +0017: MOVE R68, R64 ; 10:14 +0018: LOADI R67, 258 ; 10:14 +0019: UPCALL 0, R65 ; 10:1, OUT +0020: EOF ; 0:0 +``` + +## Output + +```plain +0=Before$ , 1=10% +0=Inside$ , 1=20% +0=After$ , 1=10% +``` + +# Test: Subroutine call requires jumping backwards + +## Source + +```basic +SUB first + OUT "first" +END SUB + +SUB second + first +END SUB + +second +``` + +## Disassembly + +```asm +0000: JUMP 5 ; 1:5 + +;; FIRST (BEGIN) +0001: LOADI R65, 0 ; 2:9 +0002: LOADI R64, 259 ; 2:9 +0003: UPCALL 0, R64 ; 2:5, OUT +0004: RETURN ; 3:1 +;; FIRST (END) + +0005: JUMP 8 ; 5:5 + +;; SECOND (BEGIN) +0006: CALL R64, 1 ; 6:5, FIRST +0007: RETURN ; 7:1 +;; SECOND (END) + +0008: CALL R64, 6 ; 9:1, SECOND +0009: EOF ; 0:0 +``` + +## Output + +```plain +0=first$ +``` + +# Test: Annotation not allowed in subroutine call + +## Source + +```basic +OUT$ 3 +``` + +## Compilation errors + +```plain +1:1: Type annotation not allowed in OUT$ +``` + +# Test: Local variables + +## Source + +```basic +SUB modify_2 + var = 2 + OUT "Inside modify_2", var +END SUB + +SUB modify_1 + var = 1 + OUT "Before modify_2", var + modify_2 + OUT "After modify_2", var +END SUB + +var = 0 +OUT "Before modify_1", var +modify_1 +OUT "After modify_1", var +``` + +## Disassembly + +```asm +0000: JUMP 8 ; 1:5 + +;; MODIFY_2 (BEGIN) +0001: LOADI R64, 2 ; 2:11 +0002: LOADI R66, 0 ; 3:9 +0003: LOADI R65, 291 ; 3:9 +0004: MOVE R68, R64 ; 3:28 +0005: LOADI R67, 258 ; 3:28 +0006: UPCALL 0, R65 ; 3:5, OUT +0007: RETURN ; 4:1 +;; MODIFY_2 (END) + +0008: JUMP 22 ; 6:5 + +;; MODIFY_1 (BEGIN) +0009: LOADI R64, 1 ; 7:11 +0010: LOADI R66, 1 ; 8:9 +0011: LOADI R65, 291 ; 8:9 +0012: MOVE R68, R64 ; 8:28 +0013: LOADI R67, 258 ; 8:28 +0014: UPCALL 0, R65 ; 8:5, OUT +0015: CALL R65, 1 ; 9:5, MODIFY_2 +0016: LOADI R66, 2 ; 10:9 +0017: LOADI R65, 291 ; 10:9 +0018: MOVE R68, R64 ; 10:27 +0019: LOADI R67, 258 ; 10:27 +0020: UPCALL 0, R65 ; 10:5, OUT +0021: RETURN ; 11:1 +;; MODIFY_1 (END) + +0022: LOADI R64, 0 ; 13:7 +0023: LOADI R66, 3 ; 14:5 +0024: LOADI R65, 291 ; 14:5 +0025: MOVE R68, R64 ; 14:24 +0026: LOADI R67, 258 ; 14:24 +0027: UPCALL 0, R65 ; 14:1, OUT +0028: CALL R65, 9 ; 15:1, MODIFY_1 +0029: LOADI R66, 4 ; 16:5 +0030: LOADI R65, 291 ; 16:5 +0031: MOVE R68, R64 ; 16:23 +0032: LOADI R67, 258 ; 16:23 +0033: UPCALL 0, R65 ; 16:1, OUT +0034: EOF ; 0:0 +``` + +## Output + +```plain +0=Before modify_1$ , 1=0% +0=Before modify_2$ , 1=1% +0=Inside modify_2$ , 1=2% +0=After modify_2$ , 1=1% +0=After modify_1$ , 1=0% +``` + +# Test: Local is not global + +## Source + +```basic +SUB set_local + local_var = 8 +END SUB + +set_local +OUT local_var +``` + +## Compilation errors + +```plain +6:5: Undefined symbol local_var +``` + +# Test: Calling a command as a function with arguments + +## Source + +```basic +x = OUT(1) +``` + +## Compilation errors + +```plain +1:5: Cannot call OUT (not a function) +``` + +# Test: Using a command as an argless function + +## Source + +```basic +x = OUT +``` + +## Compilation errors + +```plain +1:5: Cannot call OUT (not a function) +``` + +# Test: Sub name conflicts with existing global variable + +## Source + +```basic +DIM SHARED g AS INTEGER +SUB g +END SUB +``` + +## Compilation errors + +```plain +2:5: Cannot redefine g +``` + +# Test: Sub name conflicts with existing global array + +## Source + +```basic +DIM SHARED g(3) AS INTEGER +SUB g +END SUB +``` + +## Compilation errors + +```plain +2:5: Cannot redefine g +``` + +# Test: Early sub exit + +## Source + +```basic +SUB maybe_exit(i%) + OUT 1 + IF i > 2 THEN EXIT SUB + OUT 2 +END SUB + +FOR i = 0 TO 5 + maybe_exit(i) +NEXT +``` + +## Disassembly + +```asm +0000: JUMP 13 ; 1:5 + +;; MAYBE_EXIT (BEGIN) +0001: LOADI R66, 1 ; 2:9 +0002: LOADI R65, 258 ; 2:9 +0003: UPCALL 0, R65 ; 2:5, OUT +0004: MOVE R65, R64 ; 3:8 +0005: LOADI R66, 2 ; 3:12 +0006: CMPGTI R65, R65, R66 ; 3:10 +0007: JMPF R65, 9 ; 3:8 +0008: JUMP 12 ; 3:19 +0009: LOADI R66, 2 ; 4:9 +0010: LOADI R65, 258 ; 4:9 +0011: UPCALL 0, R65 ; 4:5, OUT +0012: RETURN ; 5:1 +;; MAYBE_EXIT (END) + +0013: LOADI R64, 0 ; 7:9 +0014: MOVE R65, R64 ; 7:5 +0015: LOADI R66, 5 ; 7:14 +0016: CMPLEI R65, R65, R66 ; 7:11 +0017: JMPF R65, 24 ; 7:5 +0018: MOVE R65, R64 ; 8:16 +0019: CALL R65, 1 ; 8:5, MAYBE_EXIT +0020: MOVE R64, R64 ; 7:5 +0021: LOADI R65, 1 ; 7:15 +0022: ADDI R64, R64, R65 ; 7:11 +0023: JUMP 14 ; 7:5 +0024: EOF ; 0:0 +``` + +## Output + +```plain +0=1% +0=2% +0=1% +0=2% +0=1% +0=2% +0=1% +0=1% +0=1% +``` + +# Test: EXIT SUB outside SUB + +## Source + +```basic +SUB a +END SUB +EXIT SUB +``` + +## Compilation errors + +```plain +3:1: EXIT SUB outside of SUB +``` + +# Test: EXIT FUNCTION in SUB + +## Source + +```basic +SUB a + EXIT FUNCTION +END SUB +``` + +## Compilation errors + +```plain +2:5: EXIT FUNCTION outside of FUNCTION +``` + +# Test: Recursive subroutine + +## Source + +```basic +DIM SHARED counter AS INTEGER +SUB count_down(prefix$) + OUT prefix; counter + IF counter > 1 THEN + counter = counter - 1 + count_down prefix + END IF +END SUB +counter = 3 +count_down "counter is" +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: JUMP 17 ; 2:5 + +;; COUNT_DOWN (BEGIN) +0002: MOVE R66, R64 ; 3:9 +0003: LOADI R65, 275 ; 3:9 +0004: MOVE R68, R0 ; 3:17 +0005: LOADI R67, 258 ; 3:17 +0006: UPCALL 0, R65 ; 3:5, OUT +0007: MOVE R65, R0 ; 4:8 +0008: LOADI R66, 1 ; 4:18 +0009: CMPGTI R65, R65, R66 ; 4:16 +0010: JMPF R65, 16 ; 4:8 +0011: MOVE R0, R0 ; 5:19 +0012: LOADI R65, 1 ; 5:29 +0013: SUBI R0, R0, R65 ; 5:27 +0014: MOVE R65, R64 ; 6:20 +0015: CALL R65, 2 ; 6:9, COUNT_DOWN +0016: RETURN ; 8:1 +;; COUNT_DOWN (END) + +0017: LOADI R0, 3 ; 9:11 +0018: LOADI R64, 0 ; 10:12 +0019: CALL R64, 2 ; 10:1, COUNT_DOWN +0020: EOF ; 0:0 +``` + +## Output + +```plain +0=counter is$ ; 1=3% +0=counter is$ ; 1=2% +0=counter is$ ; 1=1% +``` + +# Test: Function and subroutine call one another + +## Source + +```basic +DIM SHARED value AS INTEGER + +DECLARE SUB bump_value(n%) + +FUNCTION count_value(n%) + value = value + 1 + IF n = 0 THEN + count_value = value + ELSE + bump_value(n - 1) + count_value = value + END IF +END FUNCTION + +SUB bump_value(n%) + value = value + 10 + value = count_value(n) +END SUB + +OUT count_value(2) +OUT value +``` + +## Disassembly + +```asm +0000: LOADI R0, 0 ; 1:12 +0001: JUMP 20 ; 5:10 + +;; COUNT_VALUE (BEGIN) +0002: LOADI R64, 0 ; 5:10 +0003: MOVE R0, R0 ; 6:13 +0004: LOADI R66, 1 ; 6:21 +0005: ADDI R0, R0, R66 ; 6:19 +0006: MOVE R66, R65 ; 7:8 +0007: LOADI R67, 0 ; 7:12 +0008: CMPEQI R66, R66, R67 ; 7:10 +0009: JMPF R66, 12 ; 7:8 +0010: MOVE R64, R0 ; 8:23 +0011: JUMP 19 ; 7:8 +0012: LOADI R66, 1 ; 9:5 +0013: JMPF R66, 19 ; 9:5 +0014: MOVE R66, R65 ; 10:20 +0015: LOADI R67, 1 ; 10:24 +0016: SUBI R66, R66, R67 ; 10:22 +0017: CALL R66, 21 ; 10:9, BUMP_VALUE +0018: MOVE R64, R0 ; 11:23 +0019: RETURN ; 13:1 +;; COUNT_VALUE (END) + +0020: JUMP 28 ; 15:5 + +;; BUMP_VALUE (BEGIN) +0021: MOVE R0, R0 ; 16:13 +0022: LOADI R65, 10 ; 16:21 +0023: ADDI R0, R0, R65 ; 16:19 +0024: MOVE R66, R64 ; 17:25 +0025: CALL R65, 2 ; 17:13, COUNT_VALUE +0026: MOVE R0, R65 ; 17:13 +0027: RETURN ; 18:1 +;; BUMP_VALUE (END) + +0028: LOADI R67, 2 ; 20:17 +0029: CALL R66, 2 ; 20:5, COUNT_VALUE +0030: MOVE R65, R66 ; 20:5 +0031: LOADI R64, 258 ; 20:5 +0032: UPCALL 0, R64 ; 20:1, OUT +0033: MOVE R65, R0 ; 21:5 +0034: LOADI R64, 258 ; 21:5 +0035: UPCALL 0, R64 ; 21:1, OUT +0036: EOF ; 0:0 +``` + +## Output + +```plain +0=23% +0=23% +``` + +# Test: Calling a subroutine as a function is an error + +## Source + +```basic +SUB f +END SUB +OUT f +``` + +## Compilation errors + +```plain +3:5: Cannot call f (not a function) +``` + +# Test: Sub redefines existing function + +## Source + +```basic +FUNCTION foo +END FUNCTION + +SUB foo +END SUB +``` + +## Compilation errors + +```plain +4:5: Cannot redefine foo +``` + +# Test: Sub redefines existing sub + +## Source + +```basic +SUB foo +END SUB + +SUB foo +END SUB +``` + +## Compilation errors + +```plain +4:5: Cannot redefine foo +``` + +# Test: Sub nesting within a sub + +## Source + +```basic +SUB foo + SUB bar + END SUB +END SUB +``` + +## Compilation errors + +```plain +2:5: Cannot nest FUNCTION or SUB definitions +``` + +# Test: Sub nesting within a function + +## Source + +```basic +FUNCTION foo + SUB bar + END SUB +END FUNCTION +``` + +## Compilation errors + +```plain +2:5: Cannot nest FUNCTION or SUB definitions +``` + +# Test: Sub declarations + +## Source + +```basic +DECLARE SUB foo +DECLARE SUB bar(a AS STRING) +``` + +## Disassembly + +```asm +0000: EOF ; 0:0 +``` + +# Test: Sub declarations match definition + +## Source + +```basic +DECLARE SUB foo + +SUB foo +END SUB + +DECLARE SUB foo +``` + +## Disassembly + +```asm +0000: JUMP 2 ; 3:5 + +;; FOO (BEGIN) +0001: RETURN ; 4:1 +;; FOO (END) + +0002: EOF ; 0:0 +``` + +# Test: Sub declarations must be top-level + +## Source + +```basic + +SUB foo + SUB FUNCTION bar +END SUB +``` + +## Compilation errors + +```plain +3:5: Cannot nest FUNCTION or SUB definitions +``` + +# Test: Sub pre-declaration does not match pre-definition + +## Source + +```basic +DECLARE SUB foo + +SUB foo(a AS STRING) +END SUB +``` + +## Compilation errors + +```plain +3:5: Cannot redefine foo +``` + +# Test: Sub post-declaration does not match definition + +## Source + +```basic +SUB foo +END SUB + +DECLARE SUB foo(a AS STRING) +``` + +## Compilation errors + +```plain +4:13: Cannot redefine foo +``` + +# Test: Sub declarations do not match + +## Source + +```basic +DECLARE SUB foo +DECLARE SUB foo(a as STRING) +``` + +## Compilation errors + +```plain +2:13: Cannot redefine foo +``` + +# Test: Sub redeclared as function + +## Source + +```basic +DECLARE SUB foo +DECLARE FUNCTION foo +``` + +## Compilation errors + +```plain +2:18: Cannot redefine foo% +``` diff --git a/core2/tests/test_types.md b/core2/tests/test_types.md new file mode 100644 index 00000000..465f7af7 --- /dev/null +++ b/core2/tests/test_types.md @@ -0,0 +1,155 @@ +# Test: Boolean values + +## Source + +```basic +bool_1 = FALSE +bool_2 = TRUE +OUT bool_1, bool_2 +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:10 +0001: LOADI R65, 1 ; 2:10 +0002: MOVE R67, R64 ; 3:5 +0003: LOADI R66, 288 ; 3:5 +0004: MOVE R69, R65 ; 3:13 +0005: LOADI R68, 256 ; 3:13 +0006: UPCALL 0, R66 ; 3:1, OUT +0007: EOF ; 0:0 +``` + +## Output + +```plain +0=false? , 1=true? +``` + +# Test: Double values are always constants + +## Source + +```basic +zero_double = 0.0 +small_double = 1.2 +large_double = 10000000000000000.818239895 +tiny_double = 0.001729874916 +OUT zero_double, small_double, large_double, tiny_double +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:15 +0001: LOADC R65, 1 ; 2:16 +0002: LOADC R66, 2 ; 3:16 +0003: LOADC R67, 3 ; 4:15 +0004: MOVE R69, R64 ; 5:5 +0005: LOADI R68, 289 ; 5:5 +0006: MOVE R71, R65 ; 5:18 +0007: LOADI R70, 289 ; 5:18 +0008: MOVE R73, R66 ; 5:32 +0009: LOADI R72, 289 ; 5:32 +0010: MOVE R75, R67 ; 5:46 +0011: LOADI R74, 257 ; 5:46 +0012: UPCALL 0, R68 ; 5:1, OUT +0013: EOF ; 0:0 +``` + +## Output + +```plain +0=0# , 1=1.2# , 2=10000000000000000# , 3=0.001729874916# +``` + +# Test: Integer values that fit in an instruction + +## Source + +```basic +small_int = 123 +OUT small_int +``` + +## Disassembly + +```asm +0000: LOADI R64, 123 ; 1:13 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 258 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=123% +``` + +# Test: Integer values that spill into a constant + +## Source + +```basic +large_int = 2147483640 +OUT large_int +``` + +## Disassembly + +```asm +0000: LOADC R64, 0 ; 1:13 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 258 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=2147483640% +``` + +# Test: String values + +## Source + +```basic +text = "Hello, world!" +OUT text +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:8 +0001: MOVE R66, R64 ; 2:5 +0002: LOADI R65, 259 ; 2:5 +0003: UPCALL 0, R65 ; 2:1, OUT +0004: EOF ; 0:0 +``` + +## Output + +```plain +0=Hello, world!$ +``` + +# Test: Invalid annotation for variable reference + +## Source + +```basic +d = 3.4 +d2 = d$ +``` + +## Compilation errors + +```plain +2:6: Incompatible type annotation in d$ reference +``` diff --git a/core2/tests/test_unary_neg_depth.md b/core2/tests/test_unary_neg_depth.md new file mode 100644 index 00000000..c999e6eb --- /dev/null +++ b/core2/tests/test_unary_neg_depth.md @@ -0,0 +1,13 @@ +# Test: Long unary negation chain with type error + +## Source + +```basic +OUT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT NOT 1.0 +``` + +## Compilation errors + +```plain +1:80001: Expected INTEGER but found DOUBLE +``` diff --git a/core2/tests/test_while.md b/core2/tests/test_while.md new file mode 100644 index 00000000..a984d364 --- /dev/null +++ b/core2/tests/test_while.md @@ -0,0 +1,168 @@ +# Test: WHILE loop with iterations + +## Source + +```basic +n = 3 +WHILE n > 0 + OUT n + n = n - 1 +WEND +``` + +## Disassembly + +```asm +0000: LOADI R64, 3 ; 1:5 +0001: MOVE R65, R64 ; 2:7 +0002: LOADI R66, 0 ; 2:11 +0003: CMPGTI R65, R65, R66 ; 2:9 +0004: JMPF R65, 12 ; 2:7 +0005: MOVE R66, R64 ; 3:9 +0006: LOADI R65, 258 ; 3:9 +0007: UPCALL 0, R65 ; 3:5, OUT +0008: MOVE R64, R64 ; 4:9 +0009: LOADI R65, 1 ; 4:13 +0010: SUBI R64, R64, R65 ; 4:11 +0011: JUMP 1 ; 2:7 +0012: EOF ; 0:0 +``` + +## Output + +```plain +0=3% +0=2% +0=1% +``` + +# Test: WHILE loop with zero iterations + +## Source + +```basic +WHILE FALSE + OUT 1 +WEND +``` + +## Disassembly + +```asm +0000: LOADI R64, 0 ; 1:7 +0001: JMPF R64, 6 ; 1:7 +0002: LOADI R65, 1 ; 2:9 +0003: LOADI R64, 258 ; 2:9 +0004: UPCALL 0, R64 ; 2:5, OUT +0005: JUMP 0 ; 1:7 +0006: EOF ; 0:0 +``` + +# Test: WHILE guard must be boolean + +## Source + +```basic +WHILE 2 + OUT 1 +WEND +``` + +## Compilation errors + +```plain +1:7: Expected BOOLEAN but found INTEGER +``` + +# Test: WHILE requires an expression + +## Source + +```basic +WHILE +WEND +``` + +## Compilation errors + +```plain +1:6: No expression in WHILE statement +``` + +# Test: WHILE requires matching WEND + +## Source + +```basic +WHILE TRUE +END +``` + +## Compilation errors + +```plain +1:1: WHILE without WEND +``` + +# Test: EXIT DO outside DO in WHILE + +## Source + +```basic +WHILE TRUE + EXIT DO +WEND +``` + +## Compilation errors + +```plain +2:5: EXIT DO outside of DO +``` + +# Test: EXIT DO in WHILE nested in DO exits DO + +## Source + +```basic +i = 2 +DO WHILE i > 0 + WHILE TRUE + EXIT DO + WEND + OUT i + i = i - 1 +LOOP +OUT 9 +``` + +## Disassembly + +```asm +0000: LOADI R64, 2 ; 1:5 +0001: MOVE R65, R64 ; 2:10 +0002: LOADI R66, 0 ; 2:14 +0003: CMPGTI R65, R65, R66 ; 2:12 +0004: JMPF R65, 16 ; 2:10 +0005: LOADI R65, 1 ; 3:11 +0006: JMPF R65, 9 ; 3:11 +0007: JUMP 16 ; 4:9 +0008: JUMP 5 ; 3:11 +0009: MOVE R66, R64 ; 6:9 +0010: LOADI R65, 258 ; 6:9 +0011: UPCALL 0, R65 ; 6:5, OUT +0012: MOVE R64, R64 ; 7:9 +0013: LOADI R65, 1 ; 7:13 +0014: SUBI R64, R64, R65 ; 7:11 +0015: JUMP 1 ; 2:10 +0016: LOADI R66, 9 ; 9:5 +0017: LOADI R65, 258 ; 9:5 +0018: UPCALL 0, R65 ; 9:1, OUT +0019: EOF ; 0:0 +``` + +## Output + +```plain +0=9% +``` diff --git a/core2/tests/testutils/callables/concat_fn.rs b/core2/tests/testutils/callables/concat_fn.rs new file mode 100644 index 00000000..bb5c82cb --- /dev/null +++ b/core2/tests/testutils/callables/concat_fn.rs @@ -0,0 +1,79 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A function that concatenates all of its string arguments. +pub(super) struct ConcatFunction { + metadata: Rc, +} + +impl ConcatFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("CONCAT") + .with_return_type(ExprType::Text) + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::AnyValue, + sep: ArgSepSyntax::Exactly(ArgSep::Long), + require_one: false, + allow_missing: true, + }), + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for ConcatFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut result = String::new(); + let mut reg = 1; + loop { + let sep = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + reg += 1; + match etype { + ExprType::Text => result.push_str(scope.get_string(reg)), + _ => return Err(CallError::Other("Only accepts string values")), + } + sep + } + + _ => return Err(CallError::Other("Only accepts string values")), + }; + reg += 1; + + if sep == ArgSep::End { + break; + } + } + scope.return_string(result); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/define_and_change_args_cmd.rs b/core2/tests/testutils/callables/define_and_change_args_cmd.rs new file mode 100644 index 00000000..3fa3d019 --- /dev/null +++ b/core2/tests/testutils/callables/define_and_change_args_cmd.rs @@ -0,0 +1,92 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A command that defines the arguments passed in as a reference. +pub(super) struct DefineAndChangeArgsCommand { + metadata: Rc, +} + +impl DefineAndChangeArgsCommand { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("DEFINE_AND_CHANGE_ARGS") + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::VariableRef, + sep: ArgSepSyntax::OneOf(&[ArgSep::Long, ArgSep::Short]), + require_one: true, + allow_missing: false, + }), + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for DefineAndChangeArgsCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, mut scope: Scope<'_>) -> CallResult<()> { + let mut i = 0; + loop { + let VarArgTag::Pointer(sep) = scope.get_type(i) else { + // TODO(jmmv): Replace with a proper error return and validate it. + panic!("Command expects variable references only"); + }; + i += 1; + + let mut typed_ptr = scope.get_mut_ref(i); + match typed_ptr.vtype { + ExprType::Boolean => { + let b = typed_ptr.deref_boolean(); + typed_ptr.set_boolean(!b); + } + + ExprType::Double => { + let d = typed_ptr.deref_double(); + typed_ptr.set_double(d + 0.6); + } + + ExprType::Integer => { + let i = typed_ptr.deref_integer(); + typed_ptr.set_integer(i + 1); + } + + ExprType::Text => { + let s = typed_ptr.deref_string(); + typed_ptr.set_string(format!("{}.", s)); + } + } + i += 1; + + if sep == ArgSep::End { + break; + } + } + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/define_arg_cmd.rs b/core2/tests/testutils/callables/define_arg_cmd.rs new file mode 100644 index 00000000..c4d587e8 --- /dev/null +++ b/core2/tests/testutils/callables/define_arg_cmd.rs @@ -0,0 +1,57 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A command that defines the argument passed in as a reference. +pub(super) struct DefineArgCommand { + metadata: Rc, +} + +impl DefineArgCommand { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("DEFINE_ARG") + .with_syntax(&[( + &[SingularArgSyntax::RequiredRef( + RequiredRefSyntax { + name: Cow::Borrowed("arg"), + require_array: false, + define_undefined: true, + }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for DefineArgCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, _scope: Scope<'_>) -> CallResult<()> { + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/get_data_cmd.rs b/core2/tests/testutils/callables/get_data_cmd.rs new file mode 100644 index 00000000..8df60394 --- /dev/null +++ b/core2/tests/testutils/callables/get_data_cmd.rs @@ -0,0 +1,69 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that dumps all DATA values visible to the upcall. +pub(super) struct GetDataCommand { + metadata: Rc, + output: Rc>, +} + +impl GetDataCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("GETDATA") + .with_syntax(&[(&[], None)]) + .test_build(), + output, + }) + } +} + +fn format_datum(datum: &Option) -> String { + match datum { + None => "()".to_owned(), + Some(ConstantDatum::Boolean(b)) => format!("{b}?"), + Some(ConstantDatum::Double(d)) => format!("{d}#"), + Some(ConstantDatum::Integer(i)) => format!("{i}%"), + Some(ConstantDatum::Text(s)) => format!("{s}$"), + } +} + +#[async_trait(?Send)] +impl Callable for GetDataCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let text = scope + .data() + .iter() + .enumerate() + .map(|(i, datum)| format!("{i}={}", format_datum(datum))) + .collect::>() + .join(" "); + let mut output = self.output.borrow_mut(); + output.push_str(&text); + output.push('\n'); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/increment_required_int_cmd.rs b/core2/tests/testutils/callables/increment_required_int_cmd.rs new file mode 100644 index 00000000..8f8864bf --- /dev/null +++ b/core2/tests/testutils/callables/increment_required_int_cmd.rs @@ -0,0 +1,67 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A command that increments the argument passed in as a reference. +pub(super) struct IncrementRequiredIntCommand { + metadata: Rc, +} + +impl IncrementRequiredIntCommand { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("INCREMENT_REQUIRED_INT") + .with_syntax(&[( + &[SingularArgSyntax::RequiredRef( + RequiredRefSyntax { + name: Cow::Borrowed("arg"), + require_array: false, + define_undefined: false, + }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for IncrementRequiredIntCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, mut scope: Scope<'_>) -> CallResult<()> { + let mut typed_ptr = scope.get_mut_ref(0); + if typed_ptr.vtype != ExprType::Integer { + // TODO(jmmv): Make this error type more specific and determine the position of the + // problematic argument via the `DebugInfo` which we should propagate through the + // `Scope`. + return Err(CallError::Other("Invalid type in argument")); + } + let mut i = typed_ptr.deref_integer(); + i += 1; + typed_ptr.set_integer(i); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/is_positive_fn.rs b/core2/tests/testutils/callables/is_positive_fn.rs new file mode 100644 index 00000000..f5365941 --- /dev/null +++ b/core2/tests/testutils/callables/is_positive_fn.rs @@ -0,0 +1,56 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A function that returns whether its integer argument is positive. +pub(super) struct IsPositiveFunction { + metadata: Rc, +} + +impl IsPositiveFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("IS_POSITIVE") + .with_return_type(ExprType::Boolean) + .with_syntax(&[( + &[SingularArgSyntax::RequiredValue( + RequiredValueSyntax { name: Cow::Borrowed("n"), vtype: ExprType::Integer }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for IsPositiveFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let n = scope.get_integer(1); + scope.return_boolean(n > 0); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/last_error_fn.rs b/core2/tests/testutils/callables/last_error_fn.rs new file mode 100644 index 00000000..40616747 --- /dev/null +++ b/core2/tests/testutils/callables/last_error_fn.rs @@ -0,0 +1,49 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::rc::Rc; + +/// A function that returns the last error recorded by the VM. +pub(super) struct LastErrorFunction { + metadata: Rc, +} + +impl LastErrorFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("LAST_ERROR") + .with_return_type(ExprType::Text) + .with_syntax(&[(&[], None)]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for LastErrorFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let last_error = scope.last_error().map(str::to_owned).unwrap_or_default(); + scope.return_string(last_error); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/meaning_of_life_fn.rs b/core2/tests/testutils/callables/meaning_of_life_fn.rs new file mode 100644 index 00000000..b1cf05ab --- /dev/null +++ b/core2/tests/testutils/callables/meaning_of_life_fn.rs @@ -0,0 +1,48 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::rc::Rc; + +/// An argless function that returns the meaning of life (42). +pub(super) struct MeaningOfLifeFunction { + metadata: Rc, +} + +impl MeaningOfLifeFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("MEANING_OF_LIFE") + .with_return_type(ExprType::Integer) + .with_syntax(&[(&[], None)]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for MeaningOfLifeFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + scope.return_integer(42); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/mod.rs b/core2/tests/testutils/callables/mod.rs new file mode 100644 index 00000000..ebcf4a17 --- /dev/null +++ b/core2/tests/testutils/callables/mod.rs @@ -0,0 +1,131 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Callables exposed to integration tests. + +use endbasic_core2::*; +use std::cell::RefCell; +use std::collections::HashMap; +use std::rc::Rc; + +mod concat_fn; +use concat_fn::ConcatFunction; + +mod define_arg_cmd; +use define_arg_cmd::DefineArgCommand; + +mod define_and_change_args_cmd; +use define_and_change_args_cmd::DefineAndChangeArgsCommand; + +mod get_data_cmd; +use get_data_cmd::GetDataCommand; + +mod increment_required_int_cmd; +use increment_required_int_cmd::IncrementRequiredIntCommand; + +mod is_positive_fn; +use is_positive_fn::IsPositiveFunction; + +mod last_error_fn; +use last_error_fn::LastErrorFunction; + +mod meaning_of_life_fn; +use meaning_of_life_fn::MeaningOfLifeFunction; + +mod out_any_value_cmd; +use out_any_value_cmd::OutAnyValueCommand; + +mod out_any_value_optional_cmd; +use out_any_value_optional_cmd::OutAnyValueOptionalCommand; + +mod out_cmd; +use out_cmd::OutCommand; + +mod out_optional_cmd; +use out_optional_cmd::OutOptionalCommand; + +mod out_positional_cmd; +use out_positional_cmd::OutPositionalCommand; + +mod out_required_value_cmd; +use out_required_value_cmd::OutRequiredValueCommand; + +mod raise_cmd; +use raise_cmd::RaiseCommand; + +mod raisef_fn; +use raisef_fn::RaisefFunction; + +mod sum_doubles_fn; +use sum_doubles_fn::SumDoublesFunction; + +mod sum_integers_fn; +use sum_integers_fn::SumIntegersFunction; + +/// Formats the given argument `i` in `scope` as a string depending on its `etype`. +fn format_arg(scope: &Scope<'_>, i: u8, etype: ExprType) -> String { + match etype { + ExprType::Boolean => format!("{}", scope.get_boolean(i)), + ExprType::Double => format!("{}", scope.get_double(i)), + ExprType::Integer => format!("{}", scope.get_integer(i)), + ExprType::Text => scope.get_string(i).to_string(), + } +} + +/// Formats variable argument `i` in `Scope` and returns the formatted argument, whether the +/// argument was present, and the separator that was found. +fn format_vararg(scope: &Scope<'_>, i: u8) -> (String, bool, ArgSep) { + match scope.get_type(i) { + VarArgTag::Immediate(sep, etype) => { + let formatted = format_arg(scope, i + 1, etype); + (format!("{}{}", formatted, etype.annotation()), true, sep) + } + VarArgTag::Missing(sep) => ("()".to_owned(), false, sep), + VarArgTag::Pointer(sep) => { + let typed_ptr = scope.get_ref(i + 1); + (typed_ptr.to_string(), true, sep) + } + } +} + +/// Registers all test-only callables into `upcalls_by_name`. +pub(super) fn register_all( + upcalls_by_name: &mut HashMap>, + console: Rc>, +) { + let cmds = [ + ConcatFunction::new() as Rc, + DefineAndChangeArgsCommand::new() as Rc, + DefineArgCommand::new() as Rc, + GetDataCommand::new(console.clone()) as Rc, + IncrementRequiredIntCommand::new() as Rc, + IsPositiveFunction::new() as Rc, + LastErrorFunction::new() as Rc, + MeaningOfLifeFunction::new() as Rc, + OutAnyValueCommand::new(console.clone()) as Rc, + OutAnyValueOptionalCommand::new(console.clone()) as Rc, + OutCommand::new(console.clone()) as Rc, + OutOptionalCommand::new(console.clone()) as Rc, + OutPositionalCommand::new(console.clone()) as Rc, + OutRequiredValueCommand::new(console) as Rc, + RaiseCommand::new() as Rc, + RaisefFunction::new() as Rc, + SumDoublesFunction::new() as Rc, + SumIntegersFunction::new() as Rc, + ]; + for cmd in cmds { + upcalls_by_name.insert(SymbolKey::from(cmd.metadata().name()), cmd); + } +} diff --git a/core2/tests/testutils/callables/out_any_value_cmd.rs b/core2/tests/testutils/callables/out_any_value_cmd.rs new file mode 100644 index 00000000..d2c8924a --- /dev/null +++ b/core2/tests/testutils/callables/out_any_value_cmd.rs @@ -0,0 +1,63 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use super::format_vararg; +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that prints an argument of any type. +pub(super) struct OutAnyValueCommand { + metadata: Rc, + output: Rc>, +} + +impl OutAnyValueCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT_ANY_VALUE") + .with_syntax(&[( + &[SingularArgSyntax::AnyValue( + AnyValueSyntax { name: Cow::Borrowed("arg"), allow_missing: false }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + output, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutAnyValueCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let (formatted, _present, sep) = format_vararg(&scope, 0); + assert_eq!(ArgSep::End, sep, "Command only expects one argument"); + + let mut output = self.output.borrow_mut(); + output.push_str(&formatted); + output.push('\n'); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/out_any_value_optional_cmd.rs b/core2/tests/testutils/callables/out_any_value_optional_cmd.rs new file mode 100644 index 00000000..f3565f55 --- /dev/null +++ b/core2/tests/testutils/callables/out_any_value_optional_cmd.rs @@ -0,0 +1,63 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use super::format_vararg; +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that prints an argument of any type. +pub(super) struct OutAnyValueOptionalCommand { + metadata: Rc, + output: Rc>, +} + +impl OutAnyValueOptionalCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT_ANY_VALUE_OPTIONAL") + .with_syntax(&[( + &[SingularArgSyntax::AnyValue( + AnyValueSyntax { name: Cow::Borrowed("arg"), allow_missing: true }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + output, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutAnyValueOptionalCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let (formatted, _present, sep) = format_vararg(&scope, 0); + assert_eq!(ArgSep::End, sep, "Command only expects one argument"); + + let mut output = self.output.borrow_mut(); + output.push_str(&formatted); + output.push('\n'); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/out_cmd.rs b/core2/tests/testutils/callables/out_cmd.rs new file mode 100644 index 00000000..cb25c5e4 --- /dev/null +++ b/core2/tests/testutils/callables/out_cmd.rs @@ -0,0 +1,95 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use super::format_arg; +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that prints its arguments to a virtual console. +pub(super) struct OutCommand { + metadata: Rc, + output: Rc>, +} + +impl OutCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT") + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::AnyValue, + sep: ArgSepSyntax::OneOf(&[ArgSep::As, ArgSep::Long, ArgSep::Short]), + require_one: false, + allow_missing: true, + }), + )]) + .test_build(), + output, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut line = String::new(); + let mut argi = 0; + let mut reg = 0; + loop { + let sep = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + reg += 1; + let formatted = format_arg(&scope, reg, etype); + line.push_str(&format!("{}={}{}", argi, formatted, etype.annotation())); + sep + } + VarArgTag::Missing(sep) => { + line.push_str(&format!("{}=()", argi)); + sep + } + VarArgTag::Pointer(sep) => { + reg += 1; + let typed_ptr = scope.get_ref(reg); + line.push_str(&format!("{}={}", argi, typed_ptr)); + sep + } + }; + argi += 1; + reg += 1; + + if sep == ArgSep::End { + break; + } + line.push(' '); + line.push_str(&sep.to_string()); + line.push(' '); + } + let mut output = self.output.borrow_mut(); + output.push_str(&line); + output.push('\n'); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/out_optional_cmd.rs b/core2/tests/testutils/callables/out_optional_cmd.rs new file mode 100644 index 00000000..a8846d42 --- /dev/null +++ b/core2/tests/testutils/callables/out_optional_cmd.rs @@ -0,0 +1,63 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use super::format_vararg; +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that prints its single optional argument. +pub(super) struct OutOptionalCommand { + metadata: Rc, + output: Rc>, +} + +impl OutOptionalCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT_OPTIONAL") + .with_syntax(&[( + &[SingularArgSyntax::OptionalValue( + OptionalValueSyntax { name: Cow::Borrowed("arg"), vtype: ExprType::Text }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + output, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutOptionalCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let (formatted, _present, sep) = format_vararg(&scope, 0); + assert_eq!(ArgSep::End, sep, "Command only expects one argument"); + + let mut output = self.output.borrow_mut(); + output.push_str(&formatted); + output.push('\n'); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/out_positional_cmd.rs b/core2/tests/testutils/callables/out_positional_cmd.rs new file mode 100644 index 00000000..e54044a2 --- /dev/null +++ b/core2/tests/testutils/callables/out_positional_cmd.rs @@ -0,0 +1,94 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use super::{format_arg, format_vararg}; +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that prints various positional arguments of different types. +pub(super) struct OutPositionalCommand { + metadata: Rc, + output: Rc>, +} + +impl OutPositionalCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT_POSITIONAL") + .with_syntax(&[( + &[ + SingularArgSyntax::AnyValue( + AnyValueSyntax { name: Cow::Borrowed("arg1"), allow_missing: true }, + ArgSepSyntax::OneOf(&[ArgSep::Long, ArgSep::Short]), + ), + SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg2"), + vtype: ExprType::Integer, + }, + ArgSepSyntax::Exactly(ArgSep::As), + ), + SingularArgSyntax::AnyValue( + AnyValueSyntax { name: Cow::Borrowed("arg3"), allow_missing: false }, + ArgSepSyntax::End, + ), + ], + None, + )]) + .test_build(), + output, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutPositionalCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut output = self.output.borrow_mut(); + + let mut i = 0; + + let (formatted, present, sep) = format_vararg(&scope, i); + assert_ne!(ArgSep::End, sep, "Command expects more arguments"); + output.push_str(&formatted); + output.push('\n'); + i += 1; + if present { + i += 1; + } + + let formatted = format_arg(&scope, i, ExprType::Integer); + output.push_str(&formatted); + output.push('\n'); + i += 1; + + let (formatted, present, sep) = format_vararg(&scope, i); + assert!(present, "Last argument is not optional"); + assert_eq!(ArgSep::End, sep, "No more arguments expected"); + output.push_str(&formatted); + output.push('\n'); + + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/out_required_value_cmd.rs b/core2/tests/testutils/callables/out_required_value_cmd.rs new file mode 100644 index 00000000..87f2bec1 --- /dev/null +++ b/core2/tests/testutils/callables/out_required_value_cmd.rs @@ -0,0 +1,63 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use super::format_arg; +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::cell::RefCell; +use std::rc::Rc; + +/// A command that prints an argument of a specific type. +pub(super) struct OutRequiredValueCommand { + metadata: Rc, + output: Rc>, +} + +impl OutRequiredValueCommand { + pub(super) fn new(output: Rc>) -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("OUT_REQUIRED_VALUE") + .with_syntax(&[( + &[SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg"), + vtype: ExprType::Integer, + }, + ArgSepSyntax::End, + )], + None, + )]) + .test_build(), + output, + }) + } +} + +#[async_trait(?Send)] +impl Callable for OutRequiredValueCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut output = self.output.borrow_mut(); + output.push_str(&format_arg(&scope, 0, ExprType::Integer)); + output.push('\n'); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/raise_cmd.rs b/core2/tests/testutils/callables/raise_cmd.rs new file mode 100644 index 00000000..1cc1e955 --- /dev/null +++ b/core2/tests/testutils/callables/raise_cmd.rs @@ -0,0 +1,94 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A command that raises an error based on a string argument. +/// +/// The first argument is a keyword that determines the error type. When the +/// keyword is `"syntax"`, `"syntax0"`, or `"syntax1"`, the error is a +/// `CallError::Syntax` with the position overridden to point at the string +/// argument, the first argument, or the second argument respectively. This +/// lets integration tests verify that the VM correctly propagates the position +/// override from `CallError::Syntax`. +pub(super) struct RaiseCommand { + metadata: Rc, +} + +impl RaiseCommand { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("RAISE") + .with_syntax(&[ + ( + &[SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg"), + vtype: ExprType::Text, + }, + ArgSepSyntax::End, + )], + None, + ), + ( + &[ + SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg"), + vtype: ExprType::Text, + }, + ArgSepSyntax::Exactly(ArgSep::Long), + ), + SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("n"), + vtype: ExprType::Integer, + }, + ArgSepSyntax::End, + ), + ], + None, + ), + ]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for RaiseCommand { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let arg = scope.get_string(0); + match arg { + "argument" => Err(CallError::Other("Bad argument")), + "eval" => Err(CallError::Other("Some eval error")), + "internal" => Err(CallError::Other("Some internal error")), + "io" => Err(CallError::Other("Some I/O error")), + "syntax" => Err(CallError::Syntax(scope.get_pos(0), "Some syntax error".to_owned())), + "syntax0" => Err(CallError::Syntax(scope.get_pos(0), "Some syntax error".to_owned())), + "syntax1" => Err(CallError::Syntax(scope.get_pos(1), "Some syntax error".to_owned())), + _ => Err(CallError::Other("Invalid arguments")), + } + } +} diff --git a/core2/tests/testutils/callables/raisef_fn.rs b/core2/tests/testutils/callables/raisef_fn.rs new file mode 100644 index 00000000..eaa0ab87 --- /dev/null +++ b/core2/tests/testutils/callables/raisef_fn.rs @@ -0,0 +1,95 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A function that raises an error based on a string argument. +/// +/// The first argument is a keyword that determines the error type. When the +/// keyword is `"syntax"`, `"syntax0"`, or `"syntax1"`, the error is a +/// `CallError::Syntax` with the position overridden to point at the string +/// argument, the first argument, or the second argument respectively. This +/// lets integration tests verify that the VM correctly propagates the position +/// override from `CallError::Syntax`. +pub(super) struct RaisefFunction { + metadata: Rc, +} + +impl RaisefFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("RAISEF") + .with_return_type(ExprType::Boolean) + .with_syntax(&[ + ( + &[SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg"), + vtype: ExprType::Text, + }, + ArgSepSyntax::End, + )], + None, + ), + ( + &[ + SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("arg"), + vtype: ExprType::Text, + }, + ArgSepSyntax::Exactly(ArgSep::Long), + ), + SingularArgSyntax::RequiredValue( + RequiredValueSyntax { + name: Cow::Borrowed("n"), + vtype: ExprType::Integer, + }, + ArgSepSyntax::End, + ), + ], + None, + ), + ]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for RaisefFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let arg = scope.get_string(1); + match arg { + "argument" => Err(CallError::Other("Bad argument")), + "eval" => Err(CallError::Other("Some eval error")), + "internal" => Err(CallError::Other("Some internal error")), + "io" => Err(CallError::Other("Some I/O error")), + "syntax" => Err(CallError::Syntax(scope.get_pos(0), "Some syntax error".to_owned())), + "syntax0" => Err(CallError::Syntax(scope.get_pos(0), "Some syntax error".to_owned())), + "syntax1" => Err(CallError::Syntax(scope.get_pos(1), "Some syntax error".to_owned())), + _ => Err(CallError::Other("Invalid arguments")), + } + } +} diff --git a/core2/tests/testutils/callables/sum_doubles_fn.rs b/core2/tests/testutils/callables/sum_doubles_fn.rs new file mode 100644 index 00000000..1a6b1ac8 --- /dev/null +++ b/core2/tests/testutils/callables/sum_doubles_fn.rs @@ -0,0 +1,80 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A function that adds all of its arguments. +pub(super) struct SumDoublesFunction { + metadata: Rc, +} + +impl SumDoublesFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("SUM_DOUBLES") + .with_return_type(ExprType::Double) + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::AnyValue, + sep: ArgSepSyntax::Exactly(ArgSep::Long), + require_one: false, + allow_missing: true, + }), + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for SumDoublesFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut total = 0.0; + let mut reg = 1; + loop { + let sep = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + reg += 1; + match etype { + ExprType::Double => total += scope.get_double(reg), + ExprType::Integer => total += f64::from(scope.get_integer(reg)), + _ => return Err(CallError::Other("Only accepts numerical values")), + } + sep + } + + _ => return Err(CallError::Other("Only accepts numerical values")), + }; + reg += 1; + + if sep == ArgSep::End { + break; + } + } + scope.return_double(total); + Ok(()) + } +} diff --git a/core2/tests/testutils/callables/sum_integers_fn.rs b/core2/tests/testutils/callables/sum_integers_fn.rs new file mode 100644 index 00000000..489d5a26 --- /dev/null +++ b/core2/tests/testutils/callables/sum_integers_fn.rs @@ -0,0 +1,79 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! A callable exposed to integration tests. + +use async_trait::async_trait; +use endbasic_core2::*; +use std::borrow::Cow; +use std::rc::Rc; + +/// A function that adds all of its integer arguments. +pub(super) struct SumIntegersFunction { + metadata: Rc, +} + +impl SumIntegersFunction { + pub(super) fn new() -> Rc { + Rc::from(Self { + metadata: CallableMetadataBuilder::new("SUM_INTEGERS") + .with_return_type(ExprType::Integer) + .with_syntax(&[( + &[], + Some(&RepeatedSyntax { + name: Cow::Borrowed("arg"), + type_syn: RepeatedTypeSyntax::AnyValue, + sep: ArgSepSyntax::Exactly(ArgSep::Long), + require_one: false, + allow_missing: true, + }), + )]) + .test_build(), + }) + } +} + +#[async_trait(?Send)] +impl Callable for SumIntegersFunction { + fn metadata(&self) -> Rc { + self.metadata.clone() + } + + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + let mut total: i32 = 0; + let mut reg = 1; + loop { + let sep = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + reg += 1; + match etype { + ExprType::Integer => total += scope.get_integer(reg), + _ => return Err(CallError::Other("Only accepts integer values")), + } + sep + } + + _ => return Err(CallError::Other("Only accepts integer values")), + }; + reg += 1; + + if sep == ArgSep::End { + break; + } + } + scope.return_integer(total); + Ok(()) + } +} diff --git a/core2/tests/testutils/mod.rs b/core2/tests/testutils/mod.rs new file mode 100644 index 00000000..987f8d1d --- /dev/null +++ b/core2/tests/testutils/mod.rs @@ -0,0 +1,524 @@ +// EndBASIC +// Copyright 2026 Julio Merino +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy +// of the License at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations +// under the License. + +//! Support functions to implement the integration tests. + +use endbasic_core2::*; +use std::cell::RefCell; +use std::collections::HashMap; +use std::env; +use std::ffi::OsStr; +use std::fs::{self, File}; +use std::io::{self, BufRead, BufReader, Seek, Write}; +use std::path::{Path, PathBuf}; +use std::process; +use std::rc::Rc; +use tempfile::NamedTempFile; + +mod callables; + +/// Computes the path to the directory where this test's binary lives. +fn self_dir() -> PathBuf { + let self_exe = env::current_exe().expect("Cannot get self's executable path"); + let dir = self_exe.parent().expect("Cannot get self's directory"); + assert!(dir.ends_with("target/debug/deps") || dir.ends_with("target/release/deps")); + dir.to_owned() +} + +/// Computes the path to the source file `name`. +pub(super) fn src_path(name: &str) -> PathBuf { + let test_dir = self_dir(); + let debug_or_release_dir = test_dir.parent().expect("Failed to get parent directory"); + let target_dir = debug_or_release_dir.parent().expect("Failed to get parent directory"); + let dir = target_dir.parent().expect("Failed to get parent directory"); + + // Sanity-check that we landed in the right location. + assert!(dir.join("Cargo.lock").exists()); + + dir.join(name) +} + +/// A parsed test case from a golden data file. +#[derive(Debug, Eq, PartialEq)] +struct Test { + name: String, + sources: Vec, +} + +/// A type describing the golden data of various tests in a file. +type Tests = Vec; + +/// Returns true if the `line` corresponds to a source section. +fn is_source_header(line: &str) -> bool { + line == "## Source" || line == "## Source (partial)" +} + +/// Reads the source sections of a golden test description file. +fn read_sources(path: &Path) -> io::Result { + let file = File::open(path).expect("Failed to open golden data file"); + let reader = BufReader::new(file); + + fn add_test(tests: &mut Tests, name: String, sources: Vec) -> io::Result<()> { + if sources.is_empty() { + Err(io::Error::new( + io::ErrorKind::InvalidData, + format!("Test case '{}' has no Source section", name), + )) + } else { + tests.push(Test { name, sources }); + Ok(()) + } + } + + fn finish_source(sources: &mut Vec, source: &mut Option) { + if let Some(source) = source.take() { + sources.push(source.trim_end().to_owned()); + } + } + + #[derive(Clone, Copy, Eq, PartialEq)] + enum Section { + Other, + Source, + } + + let mut tests = vec![]; + let mut current_test = None; + let mut current_section = Section::Other; + let mut sources = vec![]; + let mut source: Option = None; + for line in reader.lines() { + let line = line?; + + if let Some(stripped) = line.strip_prefix("# Test: ") { + finish_source(&mut sources, &mut source); + if let Some(name) = current_test.take() { + add_test(&mut tests, name, std::mem::take(&mut sources))?; + } + current_test = Some(stripped.to_owned()); + current_section = Section::Other; + continue; + } else if line.starts_with("# ") { + return Err(io::Error::new( + io::ErrorKind::InvalidData, + format!("Unexpected section header {}", line), + )); + } else if is_source_header(&line) { + current_section = Section::Source; + continue; + } else if line.starts_with("## ") { + finish_source(&mut sources, &mut source); + current_section = Section::Other; + continue; + } else if line == "```basic" { + if current_section == Section::Source { + if current_test.is_none() { + return Err(io::Error::new( + io::ErrorKind::InvalidData, + "Source section without test header", + )); + } + source = Some(String::new()); + } + continue; + } else if line == "```" { + finish_source(&mut sources, &mut source); + continue; + } + + if let Some(source) = source.as_mut() { + source.push_str(&line); + source.push('\n'); + } + } + + finish_source(&mut sources, &mut source); + if let Some(name) = current_test { + add_test(&mut tests, name, std::mem::take(&mut sources))?; + } + + if tests.is_empty() { + return Err(io::Error::new( + io::ErrorKind::InvalidData, + format!("Test file '{}' has no tests", path.display()), + )); + } + + Ok(tests) +} + +#[test] +fn test_read_sources_one() -> io::Result<()> { + let mut file = NamedTempFile::new()?; + write!( + file, + "junk +# Test: first + +## Source + +```basic +First line + +Second line +``` + +## Disassembly + +```asm +foo bar +``` +" + )?; + file.flush()?; + + assert_eq!( + [Test { name: "first".to_owned(), sources: vec!["First line\n\nSecond line".to_owned()] }], + read_sources(file.path())?.as_slice() + ); + + Ok(()) +} + +#[test] +fn test_read_sources_two() -> io::Result<()> { + let mut file = NamedTempFile::new()?; + write!( + file, + "junk +# Test: first + +## Source + +```basic +First line + +Second line +``` + +## Disassembly + +```asm +foo bar +``` + +# Test: second + +## Source + +```basic +The line +``` +" + )?; + file.flush()?; + + assert_eq!( + [ + Test { + name: "first".to_owned(), + sources: vec!["First line\n\nSecond line".to_owned()], + }, + Test { name: "second".to_owned(), sources: vec!["The line".to_owned()] }, + ], + read_sources(file.path())?.as_slice() + ); + + Ok(()) +} + +#[test] +fn test_read_sources_many_sources_per_test() -> io::Result<()> { + let mut file = NamedTempFile::new()?; + write!( + file, + "junk +# Test: first + +## Source (partial) + +```basic +First line +``` + +## Output + +```plain +ignored +``` + +## Source (partial) + +```basic +Second line + +Third line +``` +" + )?; + file.flush()?; + + assert_eq!( + [Test { + name: "first".to_owned(), + sources: vec!["First line".to_owned(), "Second line\n\nThird line".to_owned()], + }], + read_sources(file.path())?.as_slice() + ); + + Ok(()) +} + +/// Collection of section markers for a golden file. +struct Labels { + source: &'static str, + disassembly: &'static str, + compiler_errors: &'static str, + exit_code: &'static str, + output: &'static str, + runtime_errors: &'static str, +} + +/// Obtains the section markers to use when writing out the data of `test`. +fn labels_for(test: &Test) -> Labels { + if test.sources.len() > 1 { + Labels { + source: "## Source (partial)", + disassembly: "## Disassembly (full)", + compiler_errors: "## Compiler errors (partial)", + exit_code: "## Exit code (partial)", + output: "## Output (partial)", + runtime_errors: "## Runtime errors (partial)", + } + } else { + Labels { + source: "## Source", + disassembly: "## Disassembly", + compiler_errors: "## Compilation errors", + exit_code: "## Exit code", + output: "## Output", + runtime_errors: "## Runtime errors", + } + } +} + +/// Generates a textual diff of `golden` and `generated`. The output is meant to be useful for +/// human consumption when a test fails and is not guaranteed to be in patch format. +/// +/// Returns the empty string when the two files match. +fn diff(golden: &Path, generated: &Path) -> io::Result { + match process::Command::new("diff") + .args([OsStr::new("-u"), golden.as_os_str(), generated.as_os_str()]) + .output() + { + Ok(result) => { + let Some(code) = result.status.code() else { + return Err(io::Error::other("diff crashed")); + }; + let Ok(stdout) = String::from_utf8(result.stdout) else { + return Err(io::Error::other("diff printed non-UTF8 content to stdout")); + }; + let Ok(stderr) = String::from_utf8(result.stderr) else { + return Err(io::Error::other("diff printed non-UTF8 content to stderr")); + }; + + let mut diff = stdout; + diff.push_str(&stderr); + if code == 0 && !diff.is_empty() { + return Err(io::Error::other("diff succeeded but output is not empty")); + } else if code != 0 && diff.is_empty() { + return Err(io::Error::other("diff succeeded but output is empty")); + } + + Ok(diff) + } + + Err(e) if e.kind() == io::ErrorKind::NotFound => { + let left = fs::read_to_string(golden)?; + let right = fs::read_to_string(generated)?; + + let mut diff = String::new(); + if left != right { + diff.push_str("Golden\n"); + diff.push_str("======\n"); + diff.push_str(&left); + diff.push_str("\n\nActual\n"); + diff.push_str("======\n"); + diff.push_str(&right); + } + Ok(diff) + } + + Err(e) => Err(e), + } +} + +#[test] +fn test_diff_same() -> io::Result<()> { + let mut f1 = NamedTempFile::new()?; + let mut f2 = NamedTempFile::new()?; + + writeln!(f1, "Line 1")?; + writeln!(f1, "Line 2")?; + f1.flush()?; + f1.seek(io::SeekFrom::Start(0))?; + + writeln!(f2, "Line 1")?; + writeln!(f2, "Line 2")?; + f2.flush()?; + f2.seek(io::SeekFrom::Start(0))?; + + let diff = diff(f1.path(), f2.path())?; + assert!(diff.is_empty()); + Ok(()) +} + +#[test] +fn test_diff_different() -> io::Result<()> { + let mut f1 = NamedTempFile::new()?; + let mut f2 = NamedTempFile::new()?; + + writeln!(f1, "Line 1")?; + writeln!(f1, "Line 2")?; + f1.flush()?; + f1.seek(io::SeekFrom::Start(0))?; + + writeln!(f2, "Line 1")?; + writeln!(f2, "Line2")?; + f2.flush()?; + f2.seek(io::SeekFrom::Start(0))?; + + let diff = diff(f1.path(), f2.path())?; + assert!(!diff.is_empty()); + Ok(()) +} + +/// Executes `image` through completion in `vm`, and converts the result into an exit code. +async fn run_image(vm: &mut Vm, image: &Image) -> Result { + loop { + match vm.exec(image) { + StopReason::End(code) => return Ok(code.to_i32()), + StopReason::Eof => return Ok(0), + StopReason::Upcall(handle) => { + if let Err(e) = handle.invoke().await { + return Err(e.to_string()); + } + } + StopReason::Exception(pos, e) => return Err(format!("{}: {}", pos, e)), + } + } +} + +/// Given a `golden` test definition, executes its source part and writes the corresponding +/// `generated` file. The test is expected to pass when both match, but the caller is responsible +/// for checking this condition. +#[allow(clippy::write_with_newline)] +async fn regenerate(golden: &Path, generated: &mut W) -> io::Result<()> { + let tests = read_sources(golden)?; + + let mut first = true; + for test in tests { + if !first { + write!(generated, "\n")?; + } + write!(generated, "# Test: {}\n", test.name)?; + first = false; + let labels = labels_for(&test); + + let console = Rc::from(RefCell::from(String::new())); + let mut upcalls_by_name: HashMap> = HashMap::default(); + callables::register_all(&mut upcalls_by_name, console.clone()); + let mut compiler = Compiler::new(&upcalls_by_name, &[]).expect("Cannot fail"); + let mut image = Image::default(); + let mut vm = Vm::new(upcalls_by_name.clone()); + + for source in test.sources { + write!(generated, "\n{}\n\n", labels.source)?; + write!(generated, "```basic\n")?; + if !source.is_empty() { + write!(generated, "{}\n", source)?; + } + write!(generated, "```\n")?; + + if let Err(e) = compiler.compile_more(&mut image, &mut source.as_bytes()) { + write!(generated, "\n{}\n\n", labels.compiler_errors)?; + write!(generated, "```plain\n")?; + write!(generated, "{}\n", e)?; + write!(generated, "```\n")?; + continue; + } + + write!(generated, "\n{}\n\n", labels.disassembly)?; + write!(generated, "```asm\n")?; + for line in image.disasm() { + write!(generated, "{}\n", line)?; + } + write!(generated, "```\n")?; + + console.borrow_mut().clear(); + match run_image(&mut vm, &image).await { + Ok(0) => (), + Ok(i) => { + write!(generated, "\n{}\n\n", labels.exit_code)?; + write!(generated, "```plain\n")?; + write!(generated, "{}\n", i)?; + write!(generated, "```\n")?; + } + Err(e) => { + write!(generated, "\n{}\n\n", labels.runtime_errors)?; + write!(generated, "```plain\n")?; + write!(generated, "{}\n", e)?; + write!(generated, "```\n")?; + } + } + + let console = console.borrow(); + if !console.is_empty() { + write!(generated, "\n{}\n\n", labels.output)?; + write!(generated, "```plain\n")?; + write!(generated, "{}", console)?; + write!(generated, "```\n")?; + } + } + } + + Ok(()) +} + +/// Executes the test described in the `core2/tests/.md` file. +pub(super) async fn run_one_test(name: &'static str) -> io::Result<()> { + let golden = src_path(&format!("core2/tests/{}.md", name)); + + let mut generated = NamedTempFile::new()?; + regenerate(&golden, &mut generated).await?; + generated.flush()?; + + let diff = diff(&golden, generated.path())?; + if !diff.is_empty() { + if env::var("REGEN").as_ref().map(String::as_str) == Ok("true") { + { + let mut output = File::create(golden)?; + generated.as_file_mut().seek(io::SeekFrom::Start(0))?; + io::copy(&mut generated, &mut output)?; + } + panic!("Golden data regenerated; flip REGEN back to false"); + } else { + eprintln!("{}", diff); + panic!("Test failed; see stderr for details"); + } + } + + Ok(()) +} diff --git a/repl/Cargo.toml b/repl/Cargo.toml index 3af843d6..becbf9c4 100644 --- a/repl/Cargo.toml +++ b/repl/Cargo.toml @@ -18,9 +18,9 @@ workspace = true async-trait = "0.1" time = { version = "0.3", features = ["std"] } -[dependencies.endbasic-core] +[dependencies.endbasic-core2] version = "0.11.99" # ENDBASIC-VERSION -path = "../core" +path = "../core2" [dependencies.endbasic-std] version = "0.11.99" # ENDBASIC-VERSION diff --git a/repl/src/lib.rs b/repl/src/lib.rs index 3fee7a7a..886c8eca 100644 --- a/repl/src/lib.rs +++ b/repl/src/lib.rs @@ -15,7 +15,8 @@ //! Interactive interpreter for the EndBASIC language. -use endbasic_core::exec::{Machine, StopReason}; +use endbasic_core2::{ExitCode, StopReason}; +use endbasic_std::Machine; use endbasic_std::console::{self, Console, is_narrow, refill_and_print}; use endbasic_std::program::{BREAK_MSG, Program, continue_if_modified}; use endbasic_std::storage::Storage; @@ -63,8 +64,14 @@ pub async fn try_load_autoexec( } }; - match machine.exec(&mut code.as_slice()).await { - Ok(_) => Ok(()), + match machine.compile(&mut code.as_slice()) { + Ok(()) => match machine.exec().await { + Ok(_) => Ok(()), + Err(e) => { + console.borrow_mut().print(&format!("AUTOEXEC.BAS failed: {}", e))?; + Ok(()) + } + }, Err(e) => { console.borrow_mut().print(&format!("AUTOEXEC.BAS failed: {}", e))?; Ok(()) @@ -113,6 +120,7 @@ pub async fn run_from_cloud( console.borrow_mut().print("Starting...")?; console.borrow_mut().print("")?; + /* let result = machine.exec(&mut "RUN".as_bytes()).await; let mut console = console.borrow_mut(); @@ -145,8 +153,8 @@ pub async fn run_from_cloud( [ "You are now being dropped into the EndBASIC interpreter.", "The program you asked to run is still loaded in memory and you can interact with \ -it now. Use LIST to view the source code, EDIT to launch an editor on the source code, and RUN to \ -execute the program again.", + it now. Use LIST to view the source code, EDIT to launch an editor on the source code, and RUN to \ + execute the program again.", "Type HELP for interactive usage information.", ], " ", @@ -155,6 +163,8 @@ execute the program again.", } Ok(code) + */ + todo!(); } /// Enters the interactive interpreter. @@ -166,9 +176,9 @@ pub async fn run_repl_loop( console: Rc>, program: Rc>, ) -> io::Result { - let mut stop_reason = StopReason::Eof; + let mut stop_reason = None; let mut history = vec![]; - while stop_reason == StopReason::Eof { + while stop_reason.is_none() { let line = { let mut console = console.borrow_mut(); if console.is_interactive() { @@ -177,13 +187,22 @@ pub async fn run_repl_loop( console::read_line(&mut *console, "", "", Some(&mut history)).await }; + /* // Any signals entered during console input should not impact upcoming execution. Drain // them all. machine.drain_signals(); + */ match line { - Ok(line) => match machine.exec(&mut line.as_bytes()).await { - Ok(reason) => stop_reason = reason, + Ok(line) => match machine.compile(&mut line.as_bytes()) { + Ok(()) => match machine.exec().await { + Ok(None) => stop_reason = None, + Ok(Some(code)) => stop_reason = Some(code), + Err(e) => { + let mut console = console.borrow_mut(); + console.print(format!("ERROR: {}", e).as_str())?; + } + }, Err(e) => { let mut console = console.borrow_mut(); console.print(format!("ERROR: {}", e).as_str())?; @@ -199,13 +218,14 @@ pub async fn run_repl_loop( } else if e.kind() == io::ErrorKind::UnexpectedEof { let mut console = console.borrow_mut(); console.print("End of input by CTRL-D")?; - stop_reason = StopReason::Exited(0); + stop_reason = Some(0); } else { - stop_reason = StopReason::Exited(1); + stop_reason = Some(1); } } } + /* match stop_reason { StopReason::Eof => (), StopReason::Break => { @@ -219,14 +239,15 @@ pub async fn run_repl_loop( } } } + */ } - Ok(stop_reason.as_exit_code()) + Ok(stop_reason.unwrap()) } #[cfg(test)] mod tests { use super::*; - use endbasic_core::exec::Signal; + use endbasic_std::Signal; use endbasic_std::console::{CharsXY, Key}; use endbasic_std::storage::{Drive, DriveFactory, InMemoryDrive}; use endbasic_std::testutils::*; @@ -395,7 +416,9 @@ mod tests { "Starting...", "", ]) + /* .expect_clear() + */ .expect_prints(["Success", "", "**** Program exited due to EOF ****"]) .expect_program(Some("AUTORUN:/bar.bas"), MockDriveFactory::SCRIPT) .check(); @@ -428,6 +451,7 @@ mod tests { assert!(output.contains("You are now being dropped into")); } + /* #[test] fn test_run_repl_loop_signal_before_exec() { let mut tester = Tester::default(); @@ -444,4 +468,5 @@ mod tests { block_on(run_repl_loop(tester.get_machine(), console, program)).unwrap(); tester.run("").expect_prints([" 123", "End of input by CTRL-D"]).check(); } + */ } diff --git a/sdl/Cargo.toml b/sdl/Cargo.toml index 44dcd12e..3a10f404 100644 --- a/sdl/Cargo.toml +++ b/sdl/Cargo.toml @@ -20,9 +20,9 @@ async-trait = "0.1" once_cell = "1.8" tempfile = "3" -[dependencies.endbasic-core] +[dependencies.endbasic-core2] version = "0.11.99" # ENDBASIC-VERSION -path = "../core" +path = "../core2" [dependencies.endbasic-std] version = "0.11.99" # ENDBASIC-VERSION diff --git a/sdl/src/console.rs b/sdl/src/console.rs index 33e81374..a247a1f7 100644 --- a/sdl/src/console.rs +++ b/sdl/src/console.rs @@ -18,7 +18,7 @@ use crate::host::{self, Request, Response}; use async_channel::Sender; use async_trait::async_trait; -use endbasic_core::exec::Signal; +use endbasic_std::Signal; use endbasic_std::console::{ CharsXY, ClearType, Console, Key, PixelsXY, Resolution, SizeInPixels, remove_control_chars, }; diff --git a/sdl/src/host.rs b/sdl/src/host.rs index a2302eb4..a1169b51 100644 --- a/sdl/src/host.rs +++ b/sdl/src/host.rs @@ -21,7 +21,7 @@ use crate::font::{MonospacedFont, font_error_to_io_error}; use crate::string_error_to_io_error; use async_trait::async_trait; -use endbasic_core::exec::Signal; +use endbasic_std::Signal; use endbasic_std::console::drawing::{draw_circle, draw_circle_filled}; use endbasic_std::console::graphics::{ClampedInto, ClampedMul, InputOps, RasterInfo, RasterOps}; use endbasic_std::console::{ diff --git a/sdl/src/lib.rs b/sdl/src/lib.rs index 20405fbc..9d8c720d 100644 --- a/sdl/src/lib.rs +++ b/sdl/src/lib.rs @@ -16,7 +16,7 @@ //! SDL2-based graphics terminal emulator. use async_channel::Sender; -use endbasic_core::exec::Signal; +use endbasic_std::Signal; use endbasic_std::console::{Console, ConsoleSpec, Resolution}; use std::cell::RefCell; use std::fs::File; diff --git a/st7735s/Cargo.toml b/st7735s/Cargo.toml index 446b3f28..afcf1848 100644 --- a/st7735s/Cargo.toml +++ b/st7735s/Cargo.toml @@ -19,9 +19,9 @@ async-channel = "2.2" async-trait = "0.1" tokio = { version = "1", features = ["full"] } -[dependencies.endbasic-core] +[dependencies.endbasic-core2] version = "0.11.99" # ENDBASIC-VERSION -path = "../core" +path = "../core2" [dependencies.endbasic-std] version = "0.11.99" # ENDBASIC-VERSION diff --git a/std/Cargo.toml b/std/Cargo.toml index b5f6d61c..f1bb255a 100644 --- a/std/Cargo.toml +++ b/std/Cargo.toml @@ -22,9 +22,9 @@ radix_trie = "0.2" thiserror = "1.0" time = { version = "0.3", features = ["formatting", "local-offset", "std"] } -[dependencies.endbasic-core] +[dependencies.endbasic-core2] version = "0.11.99" # ENDBASIC-VERSION -path = "../core" +path = "../core2" # We don't directly use getrandom but rand does, and we have to customize how # getrandom is built if we want it to work in a WASM context. diff --git a/std/examples/script-runner.rs b/std/examples/script-runner.rs index d265b091..7c851598 100644 --- a/std/examples/script-runner.rs +++ b/std/examples/script-runner.rs @@ -33,7 +33,7 @@ fn safe_main() -> i32 { } }; - let mut machine = endbasic_std::MachineBuilder::default().build().unwrap(); + let mut machine = endbasic_std::MachineBuilder::default().build(); let mut input = match fs::File::open(path) { Ok(file) => file, @@ -43,8 +43,15 @@ fn safe_main() -> i32 { } }; - match block_on(machine.exec(&mut input)) { - Ok(stop_reason) => stop_reason.as_exit_code(), + match machine.compile(&mut input) { + Ok(()) => match block_on(machine.exec()) { + Ok(None) => 0, + Ok(Some(code)) => code, + Err(e) => { + eprintln!("ERROR: {}", e); + 1 + } + }, Err(e) => { eprintln!("ERROR: {}", e); 1 diff --git a/std/src/console/cmds.rs b/std/src/console/cmds.rs index 9d75088c..0448249d 100644 --- a/std/src/console/cmds.rs +++ b/std/src/console/cmds.rs @@ -20,17 +20,17 @@ use crate::console::{CharsXY, ClearType, Console, ConsoleClearable, Key}; use crate::strings::{ format_boolean, format_double, format_integer, parse_boolean, parse_double, parse_integer, }; +use crate::{Machine, MachineBuilder}; use async_trait::async_trait; -use endbasic_core::LineCol; -use endbasic_core::ast::{ArgSep, ExprType, Value, VarRef}; -use endbasic_core::compiler::{ - ArgSepSyntax, OptionalValueSyntax, RepeatedSyntax, RepeatedTypeSyntax, RequiredRefSyntax, - RequiredValueSyntax, SingularArgSyntax, +use endbasic_core2::{ + ArgSep, ArgSepSyntax, CallError, CallResult, Callable, CallableMetadata, + CallableMetadataBuilder, ExprType, LineCol, OptionalValueSyntax, RepeatedSyntax, + RepeatedTypeSyntax, RequiredRefSyntax, RequiredValueSyntax, Scope, SingularArgSyntax, + SymbolKey, VarArgTag, }; -use endbasic_core::exec::{Error, Machine, Result, Scope, ValueTag}; -use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder}; use std::borrow::Cow; use std::cell::RefCell; +use std::collections::HashMap; use std::convert::TryFrom; use std::io; use std::rc::Rc; @@ -55,7 +55,7 @@ or web browser. If you do resize them, however, restart the interpreter."; /// The `CLS` command. pub struct ClsCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -75,27 +75,24 @@ impl ClsCommand { #[async_trait(?Send)] impl Callable for ClsCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); - self.console.borrow_mut().clear(ClearType::All).map_err(|e| scope.io_error(e))?; + self.console.borrow_mut().clear(ClearType::All)?; Ok(()) } } /// The `COLOR` command. pub struct ColorCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } impl ColorCommand { - const NO_COLOR: i32 = 0; - const HAS_COLOR: i32 = 1; - /// Creates a new `COLOR` command that changes the color of the `console`. pub fn new(console: Rc>) -> Rc { Rc::from(Self { @@ -103,8 +100,8 @@ impl ColorCommand { .with_syntax(&[ (&[], None), ( - &[SingularArgSyntax::RequiredValue( - RequiredValueSyntax { + &[SingularArgSyntax::OptionalValue( + OptionalValueSyntax { name: Cow::Borrowed("fg"), vtype: ExprType::Integer, }, @@ -118,8 +115,6 @@ impl ColorCommand { OptionalValueSyntax { name: Cow::Borrowed("fg"), vtype: ExprType::Integer, - missing_value: Self::NO_COLOR, - present_value: Self::HAS_COLOR, }, ArgSepSyntax::Exactly(ArgSep::Long), ), @@ -127,8 +122,6 @@ impl ColorCommand { OptionalValueSyntax { name: Cow::Borrowed("bg"), vtype: ExprType::Integer, - missing_value: Self::NO_COLOR, - present_value: Self::HAS_COLOR, }, ArgSepSyntax::End, ), @@ -151,43 +144,46 @@ necessarily match any other color specifiable in the 0 to 255 range, as it might #[async_trait(?Send)] impl Callable for ColorCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { - fn get_color((i, pos): (i32, LineCol)) -> Result> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + fn get_color(i: i32, pos: LineCol) -> CallResult> { if i >= 0 && i <= u8::MAX as i32 { Ok(Some(i as u8)) } else { - Err(Error::SyntaxError(pos, "Color out of range".to_owned())) - } - } - - fn get_optional_color(scope: &mut Scope<'_>) -> Result> { - match scope.pop_integer() { - ColorCommand::NO_COLOR => Ok(None), - ColorCommand::HAS_COLOR => get_color(scope.pop_integer_with_pos()), - _ => unreachable!(), + Err(CallError::Syntax(pos, "Color out of range".to_owned())) } } - let (fg, bg) = if scope.nargs() == 0 { - (None, None) - } else if scope.nargs() == 1 { - (get_color(scope.pop_integer_with_pos())?, None) + let mut reg = 0; + let fg = if let VarArgTag::Immediate(sep, etype) = scope.get_type(reg) { + debug_assert!([ArgSep::Long, ArgSep::End].contains(&sep)); + debug_assert_eq!(ExprType::Integer, etype); + reg += 1; + get_color(scope.get_integer(reg), scope.get_pos(reg))? + } else { + None + }; + reg += 1; + let bg = if let VarArgTag::Immediate(sep, etype) = scope.get_type(reg) { + debug_assert!([ArgSep::Long, ArgSep::End].contains(&sep)); + debug_assert_eq!(ExprType::Integer, etype); + reg += 1; + get_color(scope.get_integer(reg), scope.get_pos(reg))? } else { - (get_optional_color(&mut scope)?, get_optional_color(&mut scope)?) + None }; - self.console.borrow_mut().set_color(fg, bg).map_err(|e| scope.io_error(e))?; + self.console.borrow_mut().set_color(fg, bg)?; Ok(()) } } /// The `INKEY` function. pub struct InKeyFunction { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -221,14 +217,14 @@ GPIO_INPUT?, within the same loop.", #[async_trait(?Send)] impl Callable for InKeyFunction { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); - let key = self.console.borrow_mut().poll_key().await.map_err(|e| scope.io_error(e))?; + let key = self.console.borrow_mut().poll_key().await?; let key_name = match key { Some(Key::ArrowDown) => "DOWN".to_owned(), Some(Key::ArrowLeft) => "LEFT".to_owned(), @@ -251,13 +247,14 @@ impl Callable for InKeyFunction { None => "".to_owned(), }; - scope.return_string(key_name) + scope.return_string(key_name); + Ok(()) } } /// The `INPUT` command. pub struct InputCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -284,10 +281,8 @@ impl InputCommand { OptionalValueSyntax { name: Cow::Borrowed("prompt"), vtype: ExprType::Text, - missing_value: 0, - present_value: 1, }, - ArgSepSyntax::OneOf(ArgSep::Long, ArgSep::Short), + ArgSepSyntax::OneOf(&[ArgSep::Long, ArgSep::Short]), ), SingularArgSyntax::RequiredRef( RequiredRefSyntax { @@ -318,26 +313,29 @@ variable to update with the obtained input.", #[async_trait(?Send)] impl Callable for InputCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, machine: &mut Machine) -> Result<()> { + async fn exec(&self, mut scope: Scope<'_>) -> CallResult<()> { + let mut reg = 0; let prompt = if scope.nargs() == 1 { "".to_owned() } else { - debug_assert!((3..=4).contains(&scope.nargs())); - - let has_prompt = scope.pop_integer(); + debug_assert!((2..=3).contains(&scope.nargs())); - let mut prompt = if has_prompt == 1 { - scope.pop_string() - } else { - debug_assert_eq!(0, has_prompt); - String::new() + let (mut prompt, sep) = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + debug_assert_eq!(ExprType::Text, etype); + reg += 1; + (scope.get_string(1).to_owned(), sep) + } + VarArgTag::Missing(sep) => (String::new(), sep), + VarArgTag::Pointer(..) => unreachable!(), }; + reg += 1; - match scope.pop_sep_tag() { + match sep { ArgSep::Long => (), ArgSep::Short => prompt.push_str("? "), _ => unreachable!(), @@ -345,22 +343,18 @@ impl Callable for InputCommand { prompt }; - let (vname, vtype, pos) = scope.pop_varref_with_pos(); + let mut regref = scope.get_mut_ref(reg); let mut console = self.console.borrow_mut(); let mut previous_answer = String::new(); - let vref = VarRef::new(vname.to_string(), Some(vtype)); loop { match read_line(&mut *console, &prompt, &previous_answer, None).await { Ok(answer) => { let trimmed_answer = answer.trim_end(); - let e = match vtype { + let e = match regref.vtype { ExprType::Boolean => match parse_boolean(trimmed_answer) { Ok(b) => { - machine - .get_mut_symbols() - .set_var(&vref, Value::Boolean(b)) - .map_err(|e| Error::EvalError(pos, format!("{}", e)))?; + regref.set_boolean(b); return Ok(()); } Err(e) => e, @@ -368,10 +362,7 @@ impl Callable for InputCommand { ExprType::Double => match parse_double(trimmed_answer) { Ok(d) => { - machine - .get_mut_symbols() - .set_var(&vref, Value::Double(d)) - .map_err(|e| Error::EvalError(pos, format!("{}", e)))?; + regref.set_double(d); return Ok(()); } Err(e) => e, @@ -379,31 +370,25 @@ impl Callable for InputCommand { ExprType::Integer => match parse_integer(trimmed_answer) { Ok(i) => { - machine - .get_mut_symbols() - .set_var(&vref, Value::Integer(i)) - .map_err(|e| Error::EvalError(pos, format!("{}", e)))?; + regref.set_integer(i); return Ok(()); } Err(e) => e, }, ExprType::Text => { - machine - .get_mut_symbols() - .set_var(&vref, Value::Text(trimmed_answer.to_owned())) - .map_err(|e| Error::EvalError(pos, format!("{}", e)))?; + regref.set_string(trimmed_answer); return Ok(()); } }; - console.print(&format!("Retry input: {}", e)).map_err(|e| scope.io_error(e))?; + console.print(&format!("Retry input: {}", e))?; previous_answer = answer; } Err(e) if e.kind() == io::ErrorKind::InvalidData => { - console.print(&format!("Retry input: {}", e)).map_err(|e| scope.io_error(e))? + console.print(&format!("Retry input: {}", e))?; } - Err(e) => return Err(scope.io_error(e)), + Err(e) => return Err(e.into()), } } } @@ -411,7 +396,7 @@ impl Callable for InputCommand { /// The `LOCATE` command. pub struct LocateCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -449,46 +434,48 @@ impl LocateCommand { #[async_trait(?Send)] impl Callable for LocateCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { - fn get_coord((i, pos): (i32, LineCol), name: &str) -> Result<(u16, LineCol)> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + fn get_coord(scope: &Scope<'_>, narg: u8, name: &str) -> CallResult<(u16, LineCol)> { + let i = scope.get_integer(narg); + let pos = scope.get_pos(narg); match u16::try_from(i) { Ok(v) => Ok((v, pos)), - Err(_) => Err(Error::SyntaxError(pos, format!("{} out of range", name))), + Err(_) => Err(CallError::Syntax(pos, format!("{} out of range", name))), } } debug_assert_eq!(2, scope.nargs()); - let (column, column_pos) = get_coord(scope.pop_integer_with_pos(), "Column")?; - let (row, row_pos) = get_coord(scope.pop_integer_with_pos(), "Row")?; + let (column, column_pos) = get_coord(&scope, 0, "Column")?; + let (row, row_pos) = get_coord(&scope, 1, "Row")?; let mut console = self.console.borrow_mut(); - let size = console.size_chars().map_err(|e| scope.io_error(e))?; + let size = console.size_chars()?; if column >= size.x { - return Err(Error::SyntaxError( + return Err(CallError::Syntax( column_pos, format!("Column {} exceeds visible range of {}", column, size.x - 1), )); } if row >= size.y { - return Err(Error::SyntaxError( + return Err(CallError::Syntax( row_pos, format!("Row {} exceeds visible range of {}", row, size.y - 1), )); } - console.locate(CharsXY::new(column, row)).map_err(|e| scope.io_error(e))?; + console.locate(CharsXY::new(column, row))?; Ok(()) } } /// The `PRINT` command. pub struct PrintCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -502,7 +489,7 @@ impl PrintCommand { Some(&RepeatedSyntax { name: Cow::Borrowed("expr"), type_syn: RepeatedTypeSyntax::AnyValue, - sep: ArgSepSyntax::OneOf(ArgSep::Long, ArgSep::Short), + sep: ArgSepSyntax::OneOf(&[ArgSep::Long, ArgSep::Short]), require_one: false, allow_missing: true, }), @@ -528,67 +515,75 @@ the cursor position remains on the same line of the message right after what was #[async_trait(?Send)] impl Callable for PrintCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { let mut text = String::new(); + let mut reg = 0; let mut nl = true; - while scope.nargs() > 0 { + loop { let mut add_space = false; - match scope.pop_value_tag() { - ValueTag::Boolean => { - let b = scope.pop_boolean(); - add_space = true; - nl = true; - text += format_boolean(b); - } - ValueTag::Double => { - let d = scope.pop_double(); - add_space = true; - nl = true; - text += &format_double(d); - } - ValueTag::Integer => { - let i = scope.pop_integer(); - add_space = true; - nl = true; - text += &format_integer(i); + let sep = match scope.get_type(reg) { + VarArgTag::Immediate(sep, etype) => { + let value_reg = reg + 1; + reg += 2; + match etype { + ExprType::Boolean => { + add_space = true; + nl = true; + text += format_boolean(scope.get_boolean(value_reg)); + } + ExprType::Double => { + add_space = true; + nl = true; + text += &format_double(scope.get_double(value_reg)); + } + ExprType::Integer => { + add_space = true; + nl = true; + text += &format_integer(scope.get_integer(value_reg)); + } + ExprType::Text => { + nl = true; + text += scope.get_string(value_reg); + } + } + sep } - ValueTag::Text => { - let s = scope.pop_string(); - nl = true; - text += &s; + VarArgTag::Missing(sep) => { + reg += 1; + nl = sep == ArgSep::End && reg == 1 && text.is_empty(); + sep } - ValueTag::Missing => { - nl = false; + VarArgTag::Pointer(sep) => { + unreachable!(); } - } + }; - if scope.nargs() > 0 { - match scope.pop_sep_tag() { - ArgSep::Short => { - if add_space { - text += " " - } - } - ArgSep::Long => { + match sep { + ArgSep::As => unreachable!(), + ArgSep::End => break, + ArgSep::Long => { + text += " "; + while !text.len().is_multiple_of(14) { text += " "; - while !text.len().is_multiple_of(14) { - text += " "; - } } - _ => unreachable!(), + } + ArgSep::Short => { + if add_space { + text += " " + } } } } if nl { - self.console.borrow_mut().print(&text).map_err(|e| scope.io_error(e))?; + self.console.borrow_mut().print(&text)?; } else { - self.console.borrow_mut().write(&text).map_err(|e| scope.io_error(e))?; + self.console.borrow_mut().write(&text)?; } Ok(()) } @@ -596,7 +591,7 @@ impl Callable for PrintCommand { /// The `SCRCOLS` function. pub struct ScrColsFunction { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -620,20 +615,21 @@ See SCRROWS to query the other dimension.", #[async_trait(?Send)] impl Callable for ScrColsFunction { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); - let size = self.console.borrow().size_chars().map_err(|e| scope.io_error(e))?; - scope.return_integer(i32::from(size.x)) + let size = self.console.borrow().size_chars()?; + scope.return_integer(i32::from(size.x)); + Ok(()) } } /// The `SCRROWS` function. pub struct ScrRowsFunction { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, } @@ -657,19 +653,20 @@ See SCRCOLS to query the other dimension.", #[async_trait(?Send)] impl Callable for ScrRowsFunction { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); - let size = self.console.borrow().size_chars().map_err(|e| scope.io_error(e))?; - scope.return_integer(i32::from(size.y)) + let size = self.console.borrow().size_chars()?; + scope.return_integer(i32::from(size.y)); + Ok(()) } } /// Adds all console-related commands for the given `console` to the `machine`. -pub fn add_all(machine: &mut Machine, console: Rc>) { +pub fn add_all(machine: &mut MachineBuilder, console: Rc>) { machine.add_clearable(ConsoleClearable::new(console.clone())); machine.add_callable(ClsCommand::new(console.clone())); machine.add_callable(ColorCommand::new(console.clone())); @@ -683,6 +680,8 @@ pub fn add_all(machine: &mut Machine, console: Rc>) { #[cfg(test)] mod tests { + use endbasic_core2::ConstantDatum; + use super::*; use crate::testutils::*; @@ -716,10 +715,13 @@ mod tests { #[test] fn test_color_errors() { check_stmt_compilation_err( - "1:1: COLOR expected <> | | <[fg%], [bg%]>", + "1:1: COLOR expected <> | <[fg%]> | <[fg%], [bg%]>", "COLOR 1, 2, 3", ); - check_stmt_compilation_err("1:8: COLOR expected <> | | <[fg%], [bg%]>", "COLOR 1; 2"); + check_stmt_compilation_err( + "1:8: COLOR expected <> | <[fg%]> | <[fg%], [bg%]>", + "COLOR 1; 2", + ); check_stmt_err("1:7: Color out of range", "COLOR 1000, 0"); check_stmt_err("1:10: Color out of range", "COLOR 0, 1000"); @@ -731,22 +733,28 @@ mod tests { #[test] fn test_inkey_ok() { Tester::default() - .run("result = INKEY") - .expect_var("result", Value::Text("".to_owned())) + .run("DIM SHARED result AS STRING: result = INKEY") + .expect_var("result", "") .check(); Tester::default() .add_input_chars("x") - .run("result = INKEY") - .expect_var("result", Value::Text("x".to_owned())) + .run("DIM SHARED result AS STRING: result = INKEY") + .expect_var("result", "x") .check(); Tester::default() .add_input_keys(&[Key::CarriageReturn, Key::Backspace, Key::NewLine]) - .run("r1 = INKEY$: r2 = INKEY: r3 = INKEY$") - .expect_var("r1", Value::Text("ENTER".to_owned())) - .expect_var("r2", Value::Text("BS".to_owned())) - .expect_var("r3", Value::Text("ENTER".to_owned())) + .run( + r#" + DIM SHARED r1 AS STRING: r1 = INKEY$ + DIM SHARED r2 AS STRING: r2 = INKEY + DIM SHARED r3 AS STRING: r3 = INKEY$ + "#, + ) + .expect_var("r1", "ENTER") + .expect_var("r2", "BS") + .expect_var("r3", "ENTER") .check(); } @@ -758,34 +766,21 @@ mod tests { #[test] fn test_input_ok() { - fn t>(stmt: &str, input: &str, output: &str, var: &str, value: V) { - Tester::default() - .add_input_chars(input) - .run(stmt) - .expect_prints([output]) - .expect_var(var, value) - .check(); + fn t(stmt: &str, input: &str, output: &str) { + Tester::default().add_input_chars(input).run(stmt).expect_prints([output]).check(); } - t("INPUT foo\nPRINT foo", "9\n", " 9", "foo", 9); - t("INPUT ; foo\nPRINT foo", "9\n", " 9", "foo", 9); - t("INPUT ; foo\nPRINT foo", "-9\n", "-9", "foo", -9); - t("INPUT , bar?\nPRINT bar", "true\n", "TRUE", "bar", true); - t("INPUT ; foo$\nPRINT foo", "\n", "", "foo", ""); - t( - "INPUT \"With question mark\"; a$\nPRINT a$", - "some long text\n", - "some long text", - "a", - "some long text", - ); + t("INPUT foo\nPRINT foo", "9\n", " 9"); + t("INPUT ; foo\nPRINT foo", "9\n", " 9"); + t("INPUT ; foo\nPRINT foo", "-9\n", "-9"); + t("INPUT , bar?\nPRINT bar", "true\n", "TRUE"); + t("INPUT ; foo$\nPRINT foo", "\n", ""); + t("INPUT \"With question mark\"; a$\nPRINT a$", "some long text\n", "some long text"); Tester::default() .add_input_chars("42\n") .run("prompt$ = \"Indirectly without question mark\"\nINPUT prompt$, b\nPRINT b * 2") .expect_prints([" 84"]) - .expect_var("prompt", "Indirectly without question mark") - .expect_var("b", 42) .check(); } @@ -793,19 +788,19 @@ mod tests { fn test_input_on_predefined_vars() { Tester::default() .add_input_chars("1.5\n") - .run("d = 3.0\nINPUT ; d") + .run("DIM SHARED d AS DOUBLE: d = 3.0: INPUT ; d") .expect_var("d", 1.5) .check(); Tester::default() .add_input_chars("foo bar\n") - .run("DIM s AS STRING\nINPUT ; s") + .run("DIM SHARED s AS STRING: INPUT ; s") .expect_var("s", "foo bar") .check(); Tester::default() .add_input_chars("5\ntrue\n") - .run("DIM b AS BOOLEAN\nINPUT ; b") + .run("DIM SHARED b AS BOOLEAN: INPUT ; b") .expect_prints(["Retry input: Invalid boolean literal 5"]) .expect_var("b", true) .check(); @@ -815,28 +810,28 @@ mod tests { fn test_input_retry() { Tester::default() .add_input_chars("\ntrue\n") - .run("INPUT ; b?") + .run("DIM SHARED b AS BOOLEAN: INPUT ; b?") .expect_prints(["Retry input: Invalid boolean literal "]) .expect_var("b", true) .check(); Tester::default() .add_input_chars("0\ntrue\n") - .run("INPUT ; b?") + .run("DIM SHARED b AS BOOLEAN: INPUT ; b?") .expect_prints(["Retry input: Invalid boolean literal 0"]) .expect_var("b", true) .check(); Tester::default() .add_input_chars("\n7\n") - .run("a = 3\nINPUT ; a") + .run("DIM SHARED a: a = 3: INPUT ; a") .expect_prints(["Retry input: Invalid integer literal "]) .expect_var("a", 7) .check(); Tester::default() .add_input_chars("x\n7\n") - .run("a = 3\nINPUT ; a") + .run("DIM SHARED a: a = 3: INPUT ; a") .expect_prints(["Retry input: Invalid integer literal x"]) .expect_var("a", 7) .check(); @@ -858,10 +853,10 @@ mod tests { "1:13: INPUT expected | <[prompt$] <,|;> vref>", "INPUT \"foo\" AS bar", ); - check_stmt_err("1:7: Undefined symbol A", "INPUT a + 1 ; b"); + check_stmt_err("1:7: Undefined symbol a", "INPUT a + 1 ; b"); Tester::default() .run("a = 3: INPUT ; a + 1") - .expect_compilation_err("1:16: Requires a reference, not a value") + .expect_compilation_err("1:16: INPUT expected | <[prompt$] <,|;> vref>") .check(); check_stmt_err("1:11: Cannot + STRING and BOOLEAN", "INPUT \"a\" + TRUE; b?"); } @@ -898,10 +893,22 @@ mod tests { let mut t = Tester::default(); t.get_console().borrow_mut().set_size_chars(CharsXY { x: 30, y: 20 }); - t.run("LOCATE 30, 0").expect_err("1:8: Column 30 exceeds visible range of 29").check(); - t.run("LOCATE 31, 0").expect_err("1:8: Column 31 exceeds visible range of 29").check(); - t.run("LOCATE 0, 20").expect_err("1:11: Row 20 exceeds visible range of 19").check(); - t.run("LOCATE 0, 21").expect_err("1:11: Row 21 exceeds visible range of 19").check(); + t.clone() + .run("LOCATE 30, 0") + .expect_err("1:8: Column 30 exceeds visible range of 29") + .check(); + t.clone() + .run("LOCATE 31, 0") + .expect_err("1:8: Column 31 exceeds visible range of 29") + .check(); + t.clone() + .run("LOCATE 0, 20") + .expect_err("1:11: Row 20 exceeds visible range of 19") + .check(); + t.clone() + .run("LOCATE 0, 21") + .expect_err("1:11: Row 21 exceeds visible range of 19") + .check(); } #[test] @@ -953,12 +960,14 @@ mod tests { .check(); Tester::default() + .set_var("word", "") .run(r#"word = "foo": PRINT word, word: PRINT word + "s""#) .expect_prints(["foo foo", "foos"]) .expect_var("word", "foo") .check(); Tester::default() + .set_var("word", "") .run(r#"word = "foo": PRINT word,: PRINT word;: PRINT word + "s""#) .expect_output([ CapturedOut::Write("foo ".to_owned()), @@ -982,10 +991,10 @@ mod tests { &ch_var }; Tester::default() - .set_var("ch", Value::Text(ch_var.clone())) + .set_var("ch", ch_var.clone()) .run("PRINT ch") .expect_prints([exp_ch]) - .expect_var("ch", Value::Text(ch_var.clone())) + .expect_var("ch", ch_var) .check(); } assert!(found_any, "Test did not exercise what we wanted"); @@ -1010,7 +1019,7 @@ mod tests { fn test_scrcols() { let mut t = Tester::default(); t.get_console().borrow_mut().set_size_chars(CharsXY { x: 12345, y: 0 }); - t.run("result = SCRCOLS").expect_var("result", 12345i32).check(); + t.run("DIM SHARED RESULT: result = SCRCOLS").expect_var("result", 12345i32).check(); check_expr_compilation_error("1:10: SCRCOLS expected no arguments", "SCRCOLS()"); check_expr_compilation_error("1:10: SCRCOLS expected no arguments", "SCRCOLS(1)"); @@ -1020,7 +1029,7 @@ mod tests { fn test_scrrows() { let mut t = Tester::default(); t.get_console().borrow_mut().set_size_chars(CharsXY { x: 0, y: 768 }); - t.run("result = SCRROWS").expect_var("result", 768i32).check(); + t.run("DIM SHARED RESULT: result = SCRROWS").expect_var("result", 768i32).check(); check_expr_compilation_error("1:10: SCRROWS expected no arguments", "SCRROWS()"); check_expr_compilation_error("1:10: SCRROWS expected no arguments", "SCRROWS(1)"); diff --git a/std/src/console/mod.rs b/std/src/console/mod.rs index a616278d..e79d77b7 100644 --- a/std/src/console/mod.rs +++ b/std/src/console/mod.rs @@ -15,9 +15,8 @@ //! Console representation and manipulation. +use crate::Clearable; use async_trait::async_trait; -use endbasic_core::exec::Clearable; -use endbasic_core::syms::Symbols; use std::cell::RefCell; use std::collections::VecDeque; use std::env; @@ -316,7 +315,7 @@ impl ConsoleClearable { } impl Clearable for ConsoleClearable { - fn reset_state(&self, _syms: &mut Symbols) { + fn reset_state(&self) { let mut console = self.console.borrow_mut(); let _ = console.leave_alt(); let _ = console.set_color(None, None); diff --git a/std/src/exec.rs b/std/src/exec.rs index c20b2be6..ca389831 100644 --- a/std/src/exec.rs +++ b/std/src/exec.rs @@ -16,23 +16,23 @@ //! Commands that manipulate the machine's state or the program's execution. use async_trait::async_trait; -use endbasic_core::LineCol; -use endbasic_core::ast::ExprType; -use endbasic_core::compiler::{ArgSepSyntax, RequiredValueSyntax, SingularArgSyntax}; -use endbasic_core::exec::{Error, Machine, Result, Scope}; -use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder}; +use endbasic_core2::{ + CallError, CallResult, Callable, CallableMetadata, CallableMetadataBuilder, LineCol, Scope, +}; use futures_lite::future::{BoxedLocal, FutureExt}; use std::borrow::Cow; use std::rc::Rc; use std::thread; use std::time::Duration; +use crate::MachineBuilder; + /// Category description for all symbols provided by this module. pub(crate) const CATEGORY: &str = "Interpreter"; /// The `CLEAR` command. pub struct ClearCommand { - metadata: CallableMetadata, + metadata: Rc, } impl ClearCommand { @@ -58,17 +58,16 @@ This command is for interactive use only.", #[async_trait(?Send)] impl Callable for ClearCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, machine: &mut Machine) -> Result<()> { - debug_assert_eq!(0, scope.nargs()); - machine.clear(); - Ok(()) + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { + Err(CallError::NeedsClear) } } +/* /// The `ERRMSG` function. pub struct ErrmsgFunction { metadata: CallableMetadata, @@ -108,12 +107,13 @@ impl Callable for ErrmsgFunction { } } } +*/ /// Type of the sleep function used by the `SLEEP` command to actually suspend execution. -pub type SleepFn = Box BoxedLocal>>; +pub type SleepFn = Box BoxedLocal>>; /// An implementation of a `SleepFn` that stops the current thread. -fn system_sleep(d: Duration, _pos: LineCol) -> BoxedLocal> { +fn system_sleep(d: Duration, _pos: LineCol) -> BoxedLocal> { async move { thread::sleep(d); Ok(()) @@ -121,6 +121,7 @@ fn system_sleep(d: Duration, _pos: LineCol) -> BoxedLocal> { .boxed_local() } +/* /// The `SLEEP` command. pub struct SleepCommand { metadata: CallableMetadata, @@ -171,21 +172,25 @@ impl Callable for SleepCommand { (self.sleep_fn)(Duration::from_secs_f64(n), pos).await } } +*/ /// Instantiates all REPL commands for the scripting machine and adds them to the `machine`. /// /// `sleep_fn` is an async function that implements a pause given a `Duration`. If not provided, /// uses the `std::thread::sleep` function. -pub fn add_scripting(machine: &mut Machine, sleep_fn: Option) { +pub fn add_scripting(machine: &mut MachineBuilder, sleep_fn: Option) { + /* machine.add_callable(ErrmsgFunction::new()); machine.add_callable(SleepCommand::new(sleep_fn.unwrap_or_else(|| Box::from(system_sleep)))); + */ } /// Instantiates all REPL commands for the interactive machine and adds them to the `machine`. -pub fn add_interactive(machine: &mut Machine) { +pub fn add_interactive(machine: &mut MachineBuilder) { machine.add_callable(ClearCommand::new()); } +/* #[cfg(test)] mod tests { use super::*; @@ -272,3 +277,4 @@ mod tests { check_stmt_err("1:7: Sleep time must be positive", "SLEEP -0.001"); } } +*/ diff --git a/std/src/gfx/mod.rs b/std/src/gfx/mod.rs index ffbb353c..98066bac 100644 --- a/std/src/gfx/mod.rs +++ b/std/src/gfx/mod.rs @@ -17,11 +17,6 @@ use crate::console::{Console, PixelsXY}; use async_trait::async_trait; -use endbasic_core::LineCol; -use endbasic_core::ast::{ArgSep, ExprType}; -use endbasic_core::compiler::{ArgSepSyntax, RequiredValueSyntax, SingularArgSyntax}; -use endbasic_core::exec::{Error, Machine, Result, Scope}; -use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder}; use std::borrow::Cow; use std::cell::RefCell; use std::convert::TryFrom; @@ -36,6 +31,7 @@ design choice is that the console has two coordinate systems: the character-base the commands described in HELP \"CONSOLE\", and the pixel-based system, used by the commands \ described in this section."; +/* /// Parses an expression that represents a single coordinate. fn parse_coordinate(i: i32, pos: LineCol) -> Result { match i16::try_from(i) { @@ -932,3 +928,4 @@ mod tests { check_expr_compilation_error("1:10: GFX_WIDTH expected no arguments", "GFX_WIDTH(1)"); } } +*/ diff --git a/std/src/gpio/mod.rs b/std/src/gpio/mod.rs index 6e023d0d..f2e8c77b 100644 --- a/std/src/gpio/mod.rs +++ b/std/src/gpio/mod.rs @@ -16,11 +16,7 @@ //! GPIO access functions and commands for EndBASIC. use async_trait::async_trait; -use endbasic_core::LineCol; -use endbasic_core::ast::{ArgSep, ExprType}; -use endbasic_core::compiler::{ArgSepSyntax, RequiredValueSyntax, SingularArgSyntax}; -use endbasic_core::exec::{Clearable, Error, Machine, Result, Scope}; -use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder, Symbols}; +use endbasic_core2::{CallResult, LineCol}; use std::any::Any; use std::borrow::Cow; use std::cell::RefCell; @@ -30,6 +26,8 @@ use std::rc::Rc; mod fakes; pub use fakes::{MockPins, NoopPins}; +use crate::Clearable; + /// Category description for all symbols provided by this module. const CATEGORY: &str = "Hardware interface EndBASIC provides features to manipulate external hardware. These features are currently limited \ @@ -42,12 +40,14 @@ pub struct Pin(pub u8); impl Pin { /// Creates a new pin number from an EndBASIC integer value. - fn from_i32(i: i32, pos: LineCol) -> Result { + fn from_i32(i: i32, pos: LineCol) -> CallResult { if i < 0 { - return Err(Error::SyntaxError(pos, format!("Pin number {} must be positive", i))); + todo!(); + //return Err(Error::SyntaxError(pos, format!("Pin number {} must be positive", i))); } if i > u8::MAX as i32 { - return Err(Error::SyntaxError(pos, format!("Pin number {} is too large", i))); + todo!(); + //return Err(Error::SyntaxError(pos, format!("Pin number {} is too large", i))); } Ok(Self(i as u8)) } @@ -71,13 +71,16 @@ pub enum PinMode { impl PinMode { /// Obtains a `PinMode` from a value. - fn parse(s: &str, pos: LineCol) -> Result { + fn parse(s: &str, pos: LineCol) -> CallResult { match s.to_ascii_uppercase().as_ref() { "IN" => Ok(PinMode::In), "IN-PULL-UP" => Ok(PinMode::InPullUp), "IN-PULL-DOWN" => Ok(PinMode::InPullDown), "OUT" => Ok(PinMode::Out), - s => Err(Error::SyntaxError(pos, format!("Unknown pin mode {}", s))), + s => { + todo!(); + //Err(Error::SyntaxError(pos, format!("Unknown pin mode {}", s))), + } } } } @@ -123,11 +126,12 @@ impl PinsClearable { } impl Clearable for PinsClearable { - fn reset_state(&self, _syms: &mut Symbols) { + fn reset_state(&self) { let _ = self.pins.borrow_mut().clear_all(); } } +/* /// The `GPIO_SETUP` command. pub struct GpioSetupCommand { metadata: CallableMetadata, @@ -649,3 +653,4 @@ mod tests { ); } } +*/ diff --git a/std/src/lib.rs b/std/src/lib.rs index a1e4afb3..08f37e8d 100644 --- a/std/src/lib.rs +++ b/std/src/lib.rs @@ -15,6 +15,15 @@ //! The EndBASIC standard library. +use std::{cell::RefCell, collections::HashMap, io, rc::Rc}; + +use async_channel::{Receiver, Sender}; +use endbasic_core2::{ + CallError, Callable, CallableMetadata, Compiler, CompilerError, ConstantDatum, ExprType, + GlobalDef, GlobalDefKind, Image, LineCol, StopReason, SymbolKey, Vm, +}; + +/* use async_channel::{Receiver, Sender}; use endbasic_core::exec::{Machine, Result, Signal, YieldNowFn}; use std::cell::RefCell; @@ -22,38 +31,146 @@ use std::rc::Rc; // TODO(jmmv): Should narrow the exposed interface by 1.0.0. pub mod arrays; +*/ pub mod console; +/* pub mod data; +*/ pub mod exec; pub mod gfx; pub mod gpio; +/* pub mod help; pub mod numerics; +*/ pub mod program; pub mod spi; pub mod storage; pub mod strings; pub mod testutils; +/// Error types for callable execution. +#[derive(Debug, thiserror::Error)] +pub enum Error { + #[error("{0}")] + CallError(#[from] CallError), + + #[error("{0}")] + CompilerError(#[from] CompilerError), + + #[error("{0}: {1}")] + RuntimeError(LineCol, String), +} + +/// Result type for callable execution. +pub type Result = std::result::Result; + +/// Trait for objects that maintain state that can be reset to defaults. +pub trait Clearable { + /// Resets any state held by the object to default values. + fn reset_state(&self); +} + +/// Signals that can be delivered to the machine. +#[derive(Clone, Debug, Eq, PartialEq)] +pub enum Signal { + /// Asks the machine to stop execution of the currently-running program. + Break, +} + +/// Executes an EndBASIC program and tracks its state. +pub struct Machine { + compiler: Compiler, + image: Image, + vm: Vm, + callables: HashMap>, + clearables: Vec>, +} + +impl Machine { + /// Resets the state of the machine by clearing all variable. + pub fn clear(&mut self) { + for clearable in self.clearables.as_slice() { + clearable.reset_state(); + } + /* DO NOT SUBMIT + todo!("Clear vm symbols and last error"); + */ + } + + /// Compiles the code in `input` and _appends_ it to the current machine context. + pub fn compile(&mut self, input: &mut dyn io::Read) -> Result<()> { + self.compiler.compile_more(&mut self.image, input)?; + Ok(()) + } + + /// Resumes (or starts) execution from the last compiled code. + pub async fn exec(&mut self) -> Result> { + loop { + match self.vm.exec(&self.image) { + StopReason::Eof => break Ok(None), + StopReason::End(code) => break Ok(Some(code.to_i32())), + StopReason::Exception(pos, msg) => { + return Err(Error::RuntimeError(pos, msg)); + } + StopReason::Upcall(handler) => match handler.invoke().await { + Ok(()) => (), + Err(CallError::NeedsClear) => { + self.clear(); + } + Err(e) => return Err(e.into()), + }, + } + } + } +} + /// Builder pattern to construct an EndBASIC interpreter. /// /// Unless otherwise specified, the interpreter is connected to a terminal-based console. #[derive(Default)] pub struct MachineBuilder { + callables: HashMap>, + clearables: Vec>, console: Option>>, gpio_pins: Option>>, sleep_fn: Option, + /* yield_now_fn: Option, + */ signals_chan: Option<(Sender, Receiver)>, + global_defs: Vec, } impl MachineBuilder { + /// Registers the given builtin callable, which must not yet be registered. + pub fn add_callable(&mut self, callable: Rc) { + let previous = self.callables.insert(SymbolKey::from(callable.metadata().name()), callable); + debug_assert!(previous.is_none(), "Cannot insert a callable twice"); + } + + /// Registers the given clearable. + /// + /// In the common case, functions and commands hold a reference to the out-of-machine state + /// they interact with. This state is invisible from here, but we may need to have access + /// to it to reset it as part of the `clear` operation. In those cases, such state must be + /// registered via this hook. + pub fn add_clearable(&mut self, clearable: Box) { + self.clearables.push(clearable); + } + /// Overrides the default terminal-based console with the given one. pub fn with_console(mut self, console: Rc>) -> Self { self.console = Some(console); self } + /// Sets a global variable to an initial value. + pub fn with_globals(mut self, defs: Vec) -> Self { + self.global_defs.extend(defs); + self + } + /// Overrides the default hardware-based GPIO pins with the given ones. pub fn with_gpio_pins(mut self, pins: Rc>) -> Self { self.gpio_pins = Some(pins); @@ -66,11 +183,13 @@ impl MachineBuilder { self } + /* /// Overrides the default yielding function with the given one. pub fn with_yield_now_fn(mut self, yield_now_fn: YieldNowFn) -> Self { self.yield_now_fn = Some(yield_now_fn); self } + */ /// Overrides the default signals channel with the given one. pub fn with_signals_chan(mut self, chan: (Sender, Receiver)) -> Self { @@ -95,26 +214,41 @@ impl MachineBuilder { } /// Builds the interpreter. - pub fn build(mut self) -> Result { + pub fn build(mut self) -> Machine { let console = self.get_console(); let gpio_pins = self.get_gpio_pins(); + /* let signals_chan = match self.signals_chan { Some(pair) => pair, None => async_channel::unbounded(), }; + */ - let mut machine = - Machine::with_signals_chan_and_yield_now_fn(signals_chan, self.yield_now_fn); + /* arrays::add_all(&mut machine); - console::add_all(&mut machine, console.clone()); + */ + console::add_all(&mut self, console.clone()); + /* data::add_all(&mut machine); gfx::add_all(&mut machine, console); gpio::add_all(&mut machine, gpio_pins); - exec::add_scripting(&mut machine, self.sleep_fn); + */ + let sleep_fn = self.sleep_fn.take(); + exec::add_scripting(&mut self, sleep_fn); + /* numerics::add_all(&mut machine); strings::add_all(&mut machine); - Ok(machine) + */ + + Machine { + compiler: Compiler::new(&self.callables, &self.global_defs) + .expect("Injected globals must be valid"), + image: Image::default(), + vm: Vm::new(self.callables.clone()), + callables: self.callables, + clearables: self.clearables, + } } /// Extends the machine with interactive (REPL) features. @@ -132,14 +266,13 @@ impl MachineBuilder { pub struct InteractiveMachineBuilder { builder: MachineBuilder, program: Option>>, - storage: Rc>, + storage: Option>>, } impl InteractiveMachineBuilder { /// Constructs an interactive machine builder from a non-interactive builder. fn from(builder: MachineBuilder) -> Self { - let storage = Rc::from(RefCell::from(storage::Storage::default())); - InteractiveMachineBuilder { builder, program: None, storage } + InteractiveMachineBuilder { builder, program: None, storage: None } } /// Returns the console that will be used for the machine. @@ -157,7 +290,10 @@ impl InteractiveMachineBuilder { /// Returns the storage subsystem that will be used for the machine. pub fn get_storage(&mut self) -> Rc> { - self.storage.clone() + if self.storage.is_none() { + self.storage = Some(Rc::from(RefCell::from(storage::Storage::default()))); + } + self.storage.clone().unwrap() } /// Overrides the default stored program with the given one. @@ -166,18 +302,25 @@ impl InteractiveMachineBuilder { self } + /// Overrides the default storage subsystem with the given one. + pub fn with_storage(mut self, storage: Rc>) -> Self { + self.storage = Some(storage); + self + } + /// Builds the interpreter. - pub fn build(mut self) -> Result { + pub fn build(mut self) -> Machine { let console = self.builder.get_console(); let program = self.get_program(); let storage = self.get_storage(); - let mut machine = self.builder.build()?; - exec::add_interactive(&mut machine); + exec::add_interactive(&mut self.builder); + /* help::add_all(&mut machine, console.clone()); - program::add_all(&mut machine, program, console.clone(), storage.clone()); - storage::add_all(&mut machine, console, storage); + */ + program::add_all(&mut self.builder, program, console.clone(), storage.clone()); + storage::add_all(&mut self.builder, console, storage); - Ok(machine) + self.builder.build() } } diff --git a/std/src/program.rs b/std/src/program.rs index 3569bfad..a31a09e5 100644 --- a/std/src/program.rs +++ b/std/src/program.rs @@ -18,11 +18,12 @@ use crate::console::{Console, Pager, read_line}; use crate::storage::Storage; use crate::strings::parse_boolean; +use crate::{InteractiveMachineBuilder, MachineBuilder}; use async_trait::async_trait; -use endbasic_core::ast::ExprType; -use endbasic_core::compiler::{ArgSepSyntax, RequiredValueSyntax, SingularArgSyntax, compile}; -use endbasic_core::exec::{Machine, Result, Scope, StopReason}; -use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder}; +use endbasic_core2::{ + ArgSepSyntax, CallResult, Callable, CallableMetadata, CallableMetadataBuilder, ExprType, + RequiredValueSyntax, Scope, SingularArgSyntax, +}; use std::borrow::Cow; use std::cell::RefCell; use std::io; @@ -125,9 +126,10 @@ pub async fn continue_if_modified( Ok(parse_boolean(&answer).unwrap_or(false)) } +/* /// The `DISASM` command. pub struct DisasmCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, program: Rc>, } @@ -154,11 +156,11 @@ assembly code cannot be reassembled nor modified at this point.", #[async_trait(?Send)] impl Callable for DisasmCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); // TODO(jmmv): We shouldn't have to parse and compile the stored program here. The machine @@ -192,10 +194,11 @@ impl Callable for DisasmCommand { Ok(()) } } +*/ /// The `EDIT` command. pub struct EditCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, program: Rc>, } @@ -217,23 +220,23 @@ impl EditCommand { #[async_trait(?Send)] impl Callable for EditCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); let mut console = self.console.borrow_mut(); let mut program = self.program.borrow_mut(); - program.edit(&mut *console).await.map_err(|e| scope.io_error(e))?; + program.edit(&mut *console).await?; Ok(()) } } /// The `LIST` command. pub struct ListCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, program: Rc>, } @@ -255,17 +258,17 @@ impl ListCommand { #[async_trait(?Send)] impl Callable for ListCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); let mut console = self.console.borrow_mut(); - let mut pager = Pager::new(&mut *console).map_err(|e| scope.io_error(e))?; + let mut pager = Pager::new(&mut *console)?; for line in self.program.borrow().text().lines() { - pager.print(line).await.map_err(|e| scope.io_error(e))?; + pager.print(line).await?; } Ok(()) } @@ -273,7 +276,7 @@ impl Callable for ListCommand { /// The `LOAD` command. pub struct LoadCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, storage: Rc>, program: Rc>, @@ -318,50 +321,47 @@ See the \"File system\" help topic for information on the path syntax.", #[async_trait(?Send)] impl Callable for LoadCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(1, scope.nargs()); - let pathname = scope.pop_string(); + let pathname = scope.get_string(0); - if continue_if_modified(&*self.program.borrow(), &mut *self.console.borrow_mut()) - .await - .map_err(|e| scope.io_error(e))? - { + if continue_if_modified(&*self.program.borrow(), &mut *self.console.borrow_mut()).await? { let (full_name, content) = { let storage = self.storage.borrow(); - let full_name = storage - .make_canonical_with_extension(&pathname, DEFAULT_EXTENSION) - .map_err(|e| scope.io_error(e))?; - let content = storage.get(&full_name).await.map_err(|e| scope.io_error(e))?; + let full_name = + storage.make_canonical_with_extension(&pathname, DEFAULT_EXTENSION)?; + let content = storage.get(&full_name).await?; let content = match String::from_utf8(content) { Ok(text) => text, Err(e) => { - return Err(scope.io_error(io::Error::new( + return Err(io::Error::new( io::ErrorKind::InvalidData, format!("Invalid file content: {}", e), - ))); + ) + .into()); } }; (full_name, content) }; self.program.borrow_mut().load(Some(&full_name), &content); - machine.clear(); + Err(endbasic_core2::CallError::NeedsClear) } else { self.console .borrow_mut() - .print("LOAD aborted; use SAVE to save your current changes.") - .map_err(|e| scope.io_error(e))?; + .print("LOAD aborted; use SAVE to save your current changes.")?; + Ok(()) } - Ok(()) } } +/* /// The `NEW` command. pub struct NewCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, program: Rc>, } @@ -392,11 +392,11 @@ instead.", #[async_trait(?Send)] impl Callable for NewCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); if continue_if_modified(&*self.program.borrow(), &mut *self.console.borrow_mut()) @@ -417,7 +417,7 @@ impl Callable for NewCommand { /// The `RUN` command. pub struct RunCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, program: Rc>, } @@ -445,11 +445,11 @@ from interfering with the new execution.", #[async_trait(?Send)] impl Callable for RunCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); machine.clear(); @@ -474,7 +474,7 @@ impl Callable for RunCommand { /// The `SAVE` command. pub struct SaveCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, storage: Rc>, program: Rc>, @@ -521,11 +521,11 @@ See the \"File system\" help topic for information on the path syntax.", #[async_trait(?Send)] impl Callable for SaveCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { let name = if scope.nargs() == 0 { match self.program.borrow().name() { Some(name) => name.to_owned(), @@ -559,22 +559,27 @@ impl Callable for SaveCommand { Ok(()) } } +*/ /// Adds all program editing commands against the stored `program` to the `machine`, using /// `console` for interactive editing and using `storage` as the on-disk storage for the programs. pub fn add_all( - machine: &mut Machine, + machine: &mut MachineBuilder, program: Rc>, console: Rc>, storage: Rc>, ) { + /* machine.add_callable(DisasmCommand::new(console.clone(), program.clone())); + */ machine.add_callable(EditCommand::new(console.clone(), program.clone())); machine.add_callable(ListCommand::new(console.clone(), program.clone())); machine.add_callable(LoadCommand::new(console.clone(), storage.clone(), program.clone())); + /* machine.add_callable(NewCommand::new(console.clone(), program.clone())); machine.add_callable(RunCommand::new(console.clone(), program.clone())); machine.add_callable(SaveCommand::new(console, storage, program)); + */ } #[cfg(test)] @@ -588,6 +593,7 @@ mod tests { const YES_ANSWERS: &[&str] = &["y\n", "yes\n", "Y\n", "YES\n", "true\n", "TRUE\n"]; + /* #[test] fn test_disasm_nothing() { Tester::default().run("DISASM").expect_prints([""]).check(); @@ -643,6 +649,7 @@ mod tests { fn test_disasm_errors() { check_stmt_compilation_err("1:1: DISASM expected no arguments", "DISASM 2"); } + */ #[test] fn test_edit_ok() { @@ -828,6 +835,7 @@ mod tests { .check(); } + /* #[test] fn test_new_nothing() { Tester::default().run("NEW").expect_clear().check(); @@ -999,4 +1007,5 @@ mod tests { .expect_compilation_err("1:1: SAVE expected <> | ") .check(); } + */ } diff --git a/std/src/storage/cmds.rs b/std/src/storage/cmds.rs index 1ce1d286..1a8448ed 100644 --- a/std/src/storage/cmds.rs +++ b/std/src/storage/cmds.rs @@ -18,11 +18,12 @@ use super::time_format_error_to_io_error; use crate::console::{Console, Pager, is_narrow}; use crate::storage::Storage; +use crate::{Machine, MachineBuilder}; use async_trait::async_trait; -use endbasic_core::ast::{ArgSep, ExprType}; -use endbasic_core::compiler::{ArgSepSyntax, RequiredValueSyntax, SingularArgSyntax}; -use endbasic_core::exec::{Machine, Result, Scope}; -use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder}; +use endbasic_core2::{ + ArgSepSyntax, CallResult, Callable, CallableMetadata, CallableMetadataBuilder, ExprType, + RequiredValueSyntax, Scope, SingularArgSyntax, +}; use std::borrow::Cow; use std::cell::RefCell; use std::cmp; @@ -123,9 +124,10 @@ fn show_drives(storage: &Storage, console: &mut dyn Console) -> io::Result<()> { Ok(()) } +/* /// The `CD` command. pub struct CdCommand { - metadata: CallableMetadata, + metadata: Rc, storage: Rc>, } @@ -151,11 +153,11 @@ impl CdCommand { #[async_trait(?Send)] impl Callable for CdCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(1, scope.nargs()); let target = scope.pop_string(); @@ -167,7 +169,7 @@ impl Callable for CdCommand { /// The `COPY` command. pub struct CopyCommand { - metadata: CallableMetadata, + metadata: Rc, storage: Rc>, } @@ -210,11 +212,11 @@ See the \"File system\" help topic for information on the path syntax.", #[async_trait(?Send)] impl Callable for CopyCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(2, scope.nargs()); let src = scope.pop_string(); let dest = scope.pop_string(); @@ -225,10 +227,11 @@ impl Callable for CopyCommand { Ok(()) } } +*/ /// The `DIR` command. pub struct DirCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, storage: Rc>, } @@ -262,29 +265,28 @@ impl DirCommand { #[async_trait(?Send)] impl Callable for DirCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { let path = if scope.nargs() == 0 { - "".to_owned() + "" } else { debug_assert_eq!(1, scope.nargs()); - scope.pop_string() + scope.get_string(0) }; - show_dir(&self.storage.borrow(), &mut *self.console.borrow_mut(), &path) - .await - .map_err(|e| scope.io_error(e))?; + show_dir(&self.storage.borrow(), &mut *self.console.borrow_mut(), &path).await?; Ok(()) } } +/* /// The `KILL` command. pub struct KillCommand { - metadata: CallableMetadata, + metadata: Rc, storage: Rc>, } @@ -317,11 +319,11 @@ See the \"File system\" help topic for information on the path syntax.", #[async_trait(?Send)] impl Callable for KillCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(1, scope.nargs()); let name = scope.pop_string(); @@ -333,7 +335,7 @@ impl Callable for KillCommand { /// The `MOUNT` command. pub struct MountCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, storage: Rc>, } @@ -381,11 +383,11 @@ without a colon at the end, and targets are given in the form of a URI.", #[async_trait(?Send)] impl Callable for MountCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { if scope.nargs() == 0 { show_drives(&self.storage.borrow_mut(), &mut *self.console.borrow_mut()) .map_err(|e| scope.io_error(e))?; @@ -403,7 +405,7 @@ impl Callable for MountCommand { /// The `PWD` command. pub struct PwdCommand { - metadata: CallableMetadata, + metadata: Rc, console: Rc>, storage: Rc>, } @@ -429,11 +431,11 @@ by the underlying operating system, displays such path as well.", #[async_trait(?Send)] impl Callable for PwdCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(0, scope.nargs()); let storage = self.storage.borrow(); @@ -459,7 +461,7 @@ impl Callable for PwdCommand { /// The `UNMOUNT` command. pub struct UnmountCommand { - metadata: CallableMetadata, + metadata: Rc, storage: Rc>, } @@ -491,11 +493,11 @@ Drive names are specified without a colon at the end.", #[async_trait(?Send)] impl Callable for UnmountCommand { - fn metadata(&self) -> &CallableMetadata { - &self.metadata + fn metadata(&self) -> Rc { + self.metadata.clone() } - async fn exec(&self, mut scope: Scope<'_>, _machine: &mut Machine) -> Result<()> { + async fn exec(&self, scope: Scope<'_>) -> CallResult<()> { debug_assert_eq!(1, scope.nargs()); let drive = scope.pop_string(); @@ -504,21 +506,26 @@ impl Callable for UnmountCommand { Ok(()) } } +*/ /// Adds all file system manipulation commands for `storage` to the `machine`, using `console` to /// display information. pub fn add_all( - machine: &mut Machine, + machine: &mut MachineBuilder, console: Rc>, storage: Rc>, ) { + /* machine.add_callable(CdCommand::new(storage.clone())); machine.add_callable(CopyCommand::new(storage.clone())); + */ machine.add_callable(DirCommand::new(console.clone(), storage.clone())); + /* machine.add_callable(KillCommand::new(storage.clone())); machine.add_callable(MountCommand::new(console.clone(), storage.clone())); machine.add_callable(PwdCommand::new(console.clone(), storage.clone())); machine.add_callable(UnmountCommand::new(storage)); + */ } #[cfg(test)] @@ -529,6 +536,7 @@ mod tests { use futures_lite::future::block_on; use std::collections::BTreeMap; + /* #[test] fn test_cd_ok() { let mut t = Tester::default(); @@ -620,6 +628,7 @@ mod tests { // .expect_file("MEMORY:/no-automatic-extension.bas", "") // .check(); } + */ #[test] fn test_dir_current_empty() { @@ -704,7 +713,8 @@ mod tests { " 1 file(s), 0 bytes", "", ]; - t.run("DIR \"memory:\"") + t.clone() + .run("DIR \"memory:\"") .expect_prints(prints.clone()) .expect_file("MEMORY:/empty.bas", "") .expect_file("OTHER:/foo.bas", "hello") @@ -720,7 +730,8 @@ mod tests { " 1 file(s), 5 bytes", "", ]); - t.run("DIR \"other:/\"") + t.clone() + .run("DIR \"other:/\"") .expect_prints(prints) .expect_file("MEMORY:/empty.bas", "") .expect_file("OTHER:/foo.bas", "hello") @@ -745,7 +756,8 @@ mod tests { " 1 file(s), 0 bytes", "", ]; - t.run("DIR") + t.clone() + .run("DIR") .expect_prints(prints.clone()) .expect_file("MEMORY:/empty.bas", "") .expect_file("OTHER:/foo.bas", "hello") @@ -762,7 +774,8 @@ mod tests { " 1 file(s), 5 bytes", "", ]); - t.run("DIR") + t.clone() + .run("DIR") .expect_prints(prints) .expect_file("MEMORY:/empty.bas", "") .expect_file("OTHER:/foo.bas", "hello") @@ -834,6 +847,7 @@ mod tests { check_stmt_compilation_err("1:5: Expected STRING but found INTEGER", "DIR 2"); } + /* #[test] fn test_kill_ok() { for p in &["foo", "foo.bas"] { @@ -1000,4 +1014,5 @@ mod tests { check_stmt_err("1:1: Invalid drive name 'a:'", "UNMOUNT \"a:\""); check_stmt_err("1:1: Drive 'a' is not mounted", "UNMOUNT \"a\""); } + */ } diff --git a/std/src/strings.rs b/std/src/strings.rs index 36366d51..a84f61ef 100644 --- a/std/src/strings.rs +++ b/std/src/strings.rs @@ -16,12 +16,14 @@ //! String functions for EndBASIC. use async_trait::async_trait; +/* use endbasic_core::ast::{ArgSep, ExprType}; use endbasic_core::compiler::{ AnyValueSyntax, ArgSepSyntax, RequiredValueSyntax, SingularArgSyntax, }; use endbasic_core::exec::{Error, Machine, Result, Scope, ValueTag}; use endbasic_core::syms::{Callable, CallableMetadata, CallableMetadataBuilder}; +*/ use std::borrow::Cow; use std::cmp::min; use std::convert::TryFrom; @@ -36,7 +38,7 @@ pub fn format_boolean(b: bool) -> &'static str { } /// Parses a string `s` as a boolean. -pub fn parse_boolean(s: &str) -> std::result::Result { +pub fn parse_boolean(s: &str) -> Result { let raw = s.to_uppercase(); if raw == "TRUE" || raw == "YES" || raw == "Y" { Ok(true) @@ -53,7 +55,7 @@ pub fn format_double(d: f64) -> String { } /// Parses a string `s` as a double. -pub fn parse_double(s: &str) -> std::result::Result { +pub fn parse_double(s: &str) -> Result { match s.parse::() { Ok(d) => Ok(d), Err(_) => Err(format!("Invalid double-precision floating point literal {}", s)), @@ -66,13 +68,14 @@ pub fn format_integer(i: i32) -> String { } /// Parses a string `s` as an integer. -pub fn parse_integer(s: &str) -> std::result::Result { +pub fn parse_integer(s: &str) -> Result { match s.parse::() { Ok(d) => Ok(d), Err(_) => Err(format!("Invalid integer literal {}", s)), } } +/* /// The `ASC` function. pub struct AscFunction { metadata: CallableMetadata, @@ -861,3 +864,4 @@ mod tests { check_expr_ok("100", r#"LTRIM$(STR$(100))"#); } } +*/ diff --git a/std/src/testutils.rs b/std/src/testutils.rs index c3a1230f..9a87dce0 100644 --- a/std/src/testutils.rs +++ b/std/src/testutils.rs @@ -18,21 +18,23 @@ use crate::console::{ self, CharsXY, ClearType, Console, Key, PixelsXY, SizeInPixels, remove_control_chars, }; -use crate::gpio; -use crate::program::Program; +use crate::program::{self, Program}; use crate::storage::Storage; +use crate::{Machine, MachineBuilder, gpio}; use async_trait::async_trait; -use endbasic_core::ast::{ExprType, Value, VarRef}; -use endbasic_core::exec::{self, Machine, StopReason}; -use endbasic_core::syms::{Array, Callable, Symbol, SymbolKey}; +use endbasic_core2::{ + Compiler, ConstantDatum, ExprType, GlobalDef, GlobalDefKind, Image, StopReason, SymbolKey, Vm, +}; use futures_lite::future::block_on; use std::cell::RefCell; use std::collections::{HashMap, VecDeque}; use std::io; use std::rc::Rc; -use std::result::Result; +use std::result::Result as StdResult; use std::str; +type CheckerResult = StdResult, String>; + /// A captured command or messages sent to the mock console. #[derive(Clone, Debug, Eq, PartialEq)] pub enum CapturedOut { @@ -383,11 +385,12 @@ impl Program for RecordedProgram { /// Builder pattern to prepare an EndBASIC machine for testing purposes. #[must_use] +#[derive(Clone)] pub struct Tester { console: Rc>, storage: Rc>, program: Rc>, - machine: Machine, + global_defs: Vec, } impl Default for Tester { @@ -395,29 +398,35 @@ impl Default for Tester { fn default() -> Self { let console = Rc::from(RefCell::from(MockConsole::default())); let program = Rc::from(RefCell::from(RecordedProgram::default())); + let storage = Rc::from(RefCell::from(Storage::default())); + let global_defs = vec![]; + + Self { console, storage, program, global_defs } + } +} +impl Tester { + fn build_machine( + console: Rc>, + storage: Rc>, + program: Rc>, + global_defs: Vec, + ) -> Machine { // Default to the no-op pins that always return errors. GPIO unit tests use MockPins // directly via `make_mock_machine` to validate operation; this Tester wiring is only used // for the error-path tests that go through the real (NoopPins) backend. let gpio_pins = Rc::from(RefCell::from(gpio::NoopPins::default())); - - let mut builder = crate::MachineBuilder::default() - .with_console(console.clone()) + MachineBuilder::default() + .with_console(console) + .with_globals(global_defs) .with_gpio_pins(gpio_pins) .make_interactive() - .with_program(program.clone()); - - // Grab access to the machine's storage subsystem before we lose track of it, as we will - // need this to check its state. - let storage = builder.get_storage(); - - let machine = builder.build().unwrap(); - - Self { console, storage, program, machine } + .with_program(program) + .with_storage(storage) + .build() } -} -impl Tester { + /* /// Creates a new tester with an empty `Machine`. pub fn empty() -> Self { let console = Rc::from(RefCell::from(MockConsole::default())); @@ -428,12 +437,15 @@ impl Tester { Self { console, storage, program, machine } } + */ + /* /// Registers the given builtin command into the machine, which must not yet be registered. pub fn add_callable(mut self, callable: Rc) -> Self { self.machine.add_callable(callable); self } + */ /// Adds the `golden_in` characters as console input. pub fn add_input_chars(self, golden_in: &str) -> Self { @@ -451,9 +463,11 @@ impl Tester { /// /// This method should generally not be used, except to run native methods that have /// side-effects on the machine that we'd like to validate later. + /* pub fn get_machine(&mut self) -> &mut Machine { &mut self.machine } + */ /// Gets the mock console from the tester. /// @@ -479,9 +493,21 @@ impl Tester { self.storage.clone() } - /// Sets a variable to an initial value. - pub fn set_var(mut self, name: &str, value: Value) -> Self { - self.machine.get_mut_symbols().set_var(&VarRef::new(name, None), value).unwrap(); + /// Sets a global variable to an initial value. + pub fn set_var, V: Into>(mut self, name: S, value: V) -> Self { + let value = value.into(); + self.global_defs.push(GlobalDef { + name: name.into(), + kind: GlobalDefKind::Scalar { + etype: match &value { + ConstantDatum::Boolean(..) => ExprType::Boolean, + ConstantDatum::Double(..) => ExprType::Double, + ConstantDatum::Integer(..) => ExprType::Integer, + ConstantDatum::Text(..) => ExprType::Text, + }, + initial_value: Some(value), + }, + }); self } @@ -505,9 +531,18 @@ impl Tester { /// Runs `script` in the configured machine and returns a `Checker` object to validate /// expectations about the execution. - pub fn run>(&mut self, script: S) -> Checker<'_> { - let result = block_on(self.machine.exec(&mut script.into().as_bytes())); - Checker::new(self, result) + pub fn run>(self, script: S) -> Checker { + let mut machine = Self::build_machine( + self.console.clone(), + self.storage.clone(), + self.program.clone(), + self.global_defs, + ); + let result = match machine.compile(&mut script.into().as_bytes()) { + Ok(()) => block_on(machine.exec()).map_err(|e| format!("{}", e)), + Err(e) => Err(format!("{}", e)), + }; + Checker::new(machine, self.console, self.storage, self.program, result) } /// Runs `scripts` in the configured machine and returns a `Checker` object to validate @@ -518,47 +553,76 @@ impl Tester { /// /// This is useful when compared to `run` because `Machine::exec` compiles the script as one /// unit and thus compilation errors may prevent validating other operations later on. - pub fn run_n(&mut self, scripts: &[&str]) -> Checker<'_> { - let mut result = Ok(StopReason::Eof); + pub fn run_n(self, scripts: &[&str]) -> Checker { + let mut machine = Self::build_machine( + self.console.clone(), + self.storage.clone(), + self.program.clone(), + self.global_defs, + ); + let mut result = Ok(None); for script in scripts { - result = block_on(self.machine.exec(&mut script.as_bytes())); + match machine.compile(&mut script.as_bytes()) { + Ok(()) => (), + Err(e) => { + result = Err(format!("{}", e)); + break; + } + } + result = block_on(machine.exec()).map_err(|e| format!("{}", e)); if result.is_err() { break; } } - Checker::new(self, result) + Checker::new(machine, self.console, self.storage, self.program, result) } } /// Captures expectations about the execution of a command and validates them. #[must_use] -pub struct Checker<'a> { - tester: &'a Tester, - result: exec::Result, - exp_result: Result, +pub struct Checker { + machine: Machine, + console: Rc>, + storage: Rc>, + program: Rc>, + result: CheckerResult, + exp_result: CheckerResult, exp_output: Vec, exp_drives: HashMap, exp_program_name: Option, exp_program_text: String, + /* exp_arrays: HashMap, - exp_vars: HashMap, + */ + exp_vars: HashMap, } -impl<'a> Checker<'a> { +impl Checker { /// Creates a new checker with default expectations based on the results of an execution. /// /// The default expectations are that the execution ran through completion and that it did not /// have any side-effects. - fn new(tester: &'a Tester, result: exec::Result) -> Self { + fn new( + machine: Machine, + console: Rc>, + storage: Rc>, + program: Rc>, + result: CheckerResult, + ) -> Self { Self { - tester, + machine, + console, + storage, + program, result, - exp_result: Ok(StopReason::Eof), + exp_result: Ok(None), exp_output: vec![], exp_drives: HashMap::default(), exp_program_name: None, exp_program_text: String::new(), + /* exp_arrays: HashMap::default(), + */ exp_vars: HashMap::default(), } } @@ -568,8 +632,11 @@ impl<'a> Checker<'a> { /// If not called, defaults to expecting that execution terminated due to EOF. This or /// `expect_err` can only be called once. pub fn expect_ok(mut self, stop_reason: StopReason) -> Self { - assert_eq!(Ok(StopReason::Eof), self.exp_result); - self.exp_result = Ok(stop_reason); + self.exp_result = Ok(match stop_reason { + StopReason::End(code) => Some(code.to_i32()), + StopReason::Eof => None, + StopReason::Exception(_, _) | StopReason::Upcall(_) => unreachable!(), + }); self } @@ -579,9 +646,7 @@ impl<'a> Checker<'a> { /// If not called, defaults to expecting that execution terminated due to EOF. This or /// `expect_err` can only be called once. pub fn expect_compilation_err>(mut self, message: S) -> Self { - let message = message.into(); - assert_eq!(Ok(StopReason::Eof), self.exp_result); - self.exp_result = Err(message.clone()); + self.exp_result = Err(message.into()); self } @@ -590,50 +655,50 @@ impl<'a> Checker<'a> { /// If not called, defaults to expecting that execution terminated due to EOF. This or /// `expect_err` can only be called once. pub fn expect_err>(mut self, message: S) -> Self { - let message = message.into(); - assert_eq!(Ok(StopReason::Eof), self.exp_result); - self.exp_result = Err(message.clone()); - self - } - - /// Adds the `name` array as an array to expect in the final state of the machine. The array - /// will be tested to have the same `subtype` and `dimensions`, as well as specific `contents`. - /// The contents are provided as a collection of subscripts/value pairs to assign to the - /// expected array. - pub fn expect_array>( - mut self, - name: S, - subtype: ExprType, - dimensions: &[usize], - contents: Vec<(&[i32], Value)>, - ) -> Self { - let key = SymbolKey::from(name); - assert!(!self.exp_arrays.contains_key(&key)); - let mut array = Array::new(subtype, dimensions.to_owned()); - for (subscripts, value) in contents.into_iter() { - array.assign(subscripts, value).unwrap(); - } - self.exp_arrays.insert(key, array); + self.exp_result = Err(message.into()); self } - /// Adds the `name` array as an array to expect in the final state of the machine. The array - /// will be tested to have the same `subtype` and only one dimension with `contents`. - pub fn expect_array_simple>( - mut self, - name: S, - subtype: ExprType, - contents: Vec, - ) -> Self { - let key = SymbolKey::from(name); - assert!(!self.exp_arrays.contains_key(&key)); - let mut array = Array::new(subtype, vec![contents.len()]); - for (i, value) in contents.into_iter().enumerate() { - array.assign(&[i as i32], value).unwrap(); - } - self.exp_arrays.insert(key, array); - self - } + /* + /// Adds the `name` array as an array to expect in the final state of the machine. The array + /// will be tested to have the same `subtype` and `dimensions`, as well as specific `contents`. + /// The contents are provided as a collection of subscripts/value pairs to assign to the + /// expected array. + pub fn expect_array>( + mut self, + name: S, + subtype: ExprType, + dimensions: &[usize], + contents: Vec<(&[i32], Value)>, + ) -> Self { + let key = SymbolKey::from(name); + assert!(!self.exp_arrays.contains_key(&key)); + let mut array = Array::new(subtype, dimensions.to_owned()); + for (subscripts, value) in contents.into_iter() { + array.assign(subscripts, value).unwrap(); + } + self.exp_arrays.insert(key, array); + self + } + + /// Adds the `name` array as an array to expect in the final state of the machine. The array + /// will be tested to have the same `subtype` and only one dimension with `contents`. + pub fn expect_array_simple>( + mut self, + name: S, + subtype: ExprType, + contents: Vec, + ) -> Self { + let key = SymbolKey::from(name); + assert!(!self.exp_arrays.contains_key(&key)); + let mut array = Array::new(subtype, vec![contents.len()]); + for (i, value) in contents.into_iter().enumerate() { + array.assign(&[i as i32], value).unwrap(); + } + self.exp_arrays.insert(key, array); + self + } + */ /// Adds tracking for all the side-effects of a clear operation on the machine. pub fn expect_clear(mut self) -> Self { @@ -689,7 +754,7 @@ impl<'a> Checker<'a> { } /// Adds the `name`/`value` pair as a variable to expect in the final state of the machine. - pub fn expect_var, V: Into>(mut self, name: S, value: V) -> Self { + pub fn expect_var, V: Into>(mut self, name: S, value: V) -> Self { let key = SymbolKey::from(name); assert!(!self.exp_vars.contains_key(&key)); self.exp_vars.insert(key, value.into()); @@ -703,19 +768,27 @@ impl<'a> Checker<'a> { self.exp_output.is_empty(), "Cannot take output if we are already expecting prints because the test would fail" ); - self.tester.console.borrow_mut().take_captured_out() + self.console.borrow_mut().take_captured_out() } /// Validates all expectations. pub fn check(self) { - match self.result { - Ok(stop_reason) => assert_eq!(self.exp_result.unwrap(), stop_reason), - Err(e) => assert_eq!(self.exp_result.unwrap_err(), format!("{}", e)), - }; + assert_eq!(self.exp_result, self.result); + + for (name, exp_value) in self.exp_vars { + let value = self.machine.vm.get_global(&self.machine.image, &name).unwrap(); + assert_eq!( + exp_value, + value.unwrap_or_else(|| panic!("Expected variable {} not defined", name)), + "Expected variable {} has wrong value", + name + ); + } + /* let mut arrays = HashMap::default(); let mut vars = HashMap::default(); - for (name, symbol) in self.tester.machine.get_symbols().locals() { + for (name, symbol) in self.machine.get_symbols().locals() { match symbol { Symbol::Array(array) => { // TODO(jmmv): This array.clone() call is a hack to simplify the equality check @@ -731,10 +804,11 @@ impl<'a> Checker<'a> { } } } + */ let drive_contents = { let mut files = HashMap::new(); - let storage = self.tester.storage.borrow(); + let storage = self.storage.borrow(); for (drive_name, target) in storage.mounted().iter() { if target.starts_with("cloud://") { // TODO(jmmv): Verifying the cloud drives is hard because we would need to mock @@ -753,11 +827,13 @@ impl<'a> Checker<'a> { files }; + /* assert_eq!(self.exp_vars, vars); assert_eq!(self.exp_arrays, arrays); - assert_eq!(self.exp_output, self.tester.console.borrow().captured_out()); - assert_eq!(self.exp_program_name.as_deref(), self.tester.program.borrow().name()); - assert_eq!(self.exp_program_text, self.tester.program.borrow().text()); + */ + assert_eq!(self.exp_output, self.console.borrow().captured_out()); + assert_eq!(self.exp_program_name.as_deref(), self.program.borrow().name()); + assert_eq!(self.exp_program_text, self.program.borrow().text()); assert_eq!(self.exp_drives, drive_contents); } } @@ -774,13 +850,14 @@ pub fn check_stmt_compilation_err>(exp_error: S, stmt: &str) { } /// Executes `expr` on a scripting interpreter and ensures that the result is `exp_value`. -pub fn check_expr_ok>(exp_value: V, expr: &str) { +pub fn check_expr_ok>(exp_value: V, expr: &str) { Tester::default() .run(format!("result = {}", expr)) .expect_var("result", exp_value.into()) .check(); } +/* /// Executes `expr` on a scripting interpreter and ensures that the result is `exp_value`. /// /// Sets all `vars` before evaluating the expression so that the expression can contain variable @@ -804,6 +881,7 @@ pub fn check_expr_ok_with_vars, VS: Into