56 lines
1.5 KiB
Rust
56 lines
1.5 KiB
Rust
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//! A bare-minimum harness to evaluate a Conlang program
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use std::{error::Error, path::PathBuf};
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use cl_interpret::{convalue::ConValue, env::Environment};
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use cl_lexer::Lexer;
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use cl_parser::{inliner::ModuleInliner, Parser};
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fn main() -> Result<(), Box<dyn Error>> {
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let mut args = std::env::args();
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let prog = args.next().unwrap();
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let Some(path) = args.next().map(PathBuf::from) else {
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println!("Usage: {prog} `file.cl` [ args... ]");
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return Ok(());
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};
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let parent = path.parent().unwrap_or("".as_ref());
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let code = std::fs::read_to_string(&path)?;
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let code = Parser::new(Lexer::new(&code)).file()?;
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let code = match ModuleInliner::new(parent).inline(code) {
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Ok(code) => code,
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Err((code, ioerrs, perrs)) => {
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for (p, err) in ioerrs {
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eprintln!("{}:{err}", p.display());
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}
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for (p, err) in perrs {
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eprintln!("{}:{err}", p.display());
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}
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code
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}
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};
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let mut env = Environment::new();
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env.eval(&code)?;
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let main = "main".into();
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if env.get(main).is_ok() {
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let args = args
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.flat_map(|arg| {
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Parser::new(Lexer::new(&arg))
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.expr()
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.map(|arg| env.eval(&arg))
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})
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.collect::<Result<Vec<_>, _>>()?;
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match env.call(main, &args)? {
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ConValue::Empty => {}
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retval => println!("{retval}"),
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}
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}
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Ok(())
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}
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