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|
use std::{cell::RefCell, io::{self, IsTerminal, Read}, path::PathBuf, rc::Rc};
use clap::{Parser as ArgParser, ColorChoice};
use matrix_lang::prelude::*;
use repl::Repl;
mod repl;
mod helper;
#[derive(Debug, ArgParser)]
#[command(version, long_about = None)]
pub struct Args {
/// A path to a input program. Uses stdin if not specified.
file: Option<PathBuf>,
/// Compiles the given program
#[arg(short, long)]
compile: bool,
/// Optional output for compiled output
#[arg(short, long)]
output: Option<PathBuf>,
/// Print out debug information
#[arg(short, long)]
debug: bool,
/// Force repl after running a file
#[arg(short, long)]
repl: bool,
/// Choses color
#[arg(long)]
color: Option<ColorChoice>,
/// Disables optimizations
#[arg(long)]
disable_optimizations: bool,
}
pub enum Mode {
Repl,
Execute(Vec<u8>),
Compile(Vec<u8>, PathBuf),
}
pub struct State<'a> {
parser: Parser,
compiler: Compiler<'a>,
vm: Rc<RefCell<Vm>>,
color: bool,
repl: bool,
}
pub fn error(err: Exception, state: &State) {
if state.color {
println!("\x1b[31mError:\x1b[0m {err}");
} else {
println!("Error: {err}");
}
}
impl<'a> State<'a> {
pub fn new (args: Args) -> Result<(Self, Mode)> {
let mut buffer = Vec::new();
if let Some(path) = &args.file {
let mut f = File::open(path)?;
f.read_to_end(&mut buffer)?;
} else {
let mut stdin = io::stdin();
if !stdin.is_terminal() {
stdin.read_to_end(&mut buffer)?;
}
}
let mode;
let repl;
if args.compile {
let path = match (args.output, args.file) {
(Some(path), _) => path,
(None, Some(path)) => {
let mut path = path.clone();
path.set_extension("matc");
path
},
(None, None) => {
PathBuf::from("matc.out")
}
};
mode = Mode::Compile(buffer, path);
repl = args.repl;
} else if buffer.len() > 0 {
mode = Mode::Execute(buffer);
repl = args.repl;
} else {
mode = Mode::Repl;
repl = true;
}
let mut vm = Vm::new();
let parser = ParserBuilder::new()
.optimize(!args.disable_optimizations)
.build();
let compiler = CompilerBuilder::new()
.repl(repl)
.debug(args.debug)
.names(vm.names())
.globals(vm.globals())
.build();
matrix_std::load(&mut vm);
let color = match args.color {
Some(ColorChoice::Auto) | None => {
io::stdout().is_terminal()
},
Some(ColorChoice::Always) => true,
Some(ColorChoice::Never) => false,
};
Ok((Self {
parser,
vm: Rc::new(RefCell::new(vm)),
compiler,
color,
repl,
}, mode))
}
pub fn execute(&mut self, fun: Rc<Function>) -> Result<Value> {
let val = self.vm.borrow_mut().run(fun)?;
Ok(val)
}
pub fn compile(&mut self, code: String) -> Result<Rc<Function>> {
let ast = self.parser.parse(code)?;
let fun = self.compiler.compile(&ast)?;
Ok(fun)
}
pub fn load_program(&mut self, mut buffer: Vec<u8>) -> Result<Rc<Function>> {
let res = Program::load(buffer.as_mut_slice())?;
match res {
Some(fun) => {
Ok(fun)
},
None => {
let body = buffer_to_string(buffer)?;
self.compile(body)
},
}
}
}
fn buffer_to_string(buffer: Vec<u8>) -> Result<String> {
String::from_utf8(buffer)
.map_err(|e| exception!(IO_EXCEPTION, "{e}"))
}
fn handle_mode(state: &mut State, mode: Mode) -> Result<()> {
match mode {
Mode::Repl => {
let mut repl = Repl::new(state);
repl.run()?;
state.repl = false;
},
Mode::Execute(buffer) => {
let fun = state.load_program(buffer)?;
state.execute(fun)?;
},
Mode::Compile(buffer, path) => {
let body = buffer_to_string(buffer)?;
let fun = state.compile(body)?;
let mut file = File::create(path).map_err(|e|
exception!(IO_EXCEPTION, "{e}")
)?;
Program::save(fun, &mut file)?;
}
};
if state.repl {
let mut repl = Repl::new(state);
repl.run()?;
}
Ok(())
}
fn load() -> Result<()> {
let args = Args::parse();
let (mut state, mode) = State::new(args)?;
if let Err(e) = handle_mode(&mut state, mode) {
error(e, &state);
}
Ok(())
}
fn main() {
if let Err(e) = load() {
println!("\x1b[31mFatal:\x1b[0m {e}");
}
}
|
