71 lines
1.6 KiB
Rust
71 lines
1.6 KiB
Rust
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// trait_upcasting - https://github.com/rust-lang/rust/issues/65991
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// stabilization in progress
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#![feature(trait_upcasting)]
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mod ast;
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mod builtins;
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mod compiler;
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mod disassemble;
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mod obj;
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mod parser;
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mod token;
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mod vm;
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use std::fmt;
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use std::fs::File;
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use std::io::prelude::*;
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use std::path::PathBuf;
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use clap::Parser as ClapParser;
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use thiserror::Error;
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#[derive(ClapParser, Debug)]
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#[command(version, about, long_about = None)]
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struct Args {
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#[arg(short, long, help = "Dump program disassembly and exit")]
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disassemble: bool,
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#[arg(help = "The path of the file to run")]
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path: PathBuf,
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}
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#[derive(Debug, Error)]
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struct ProgramError(String);
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impl fmt::Display for ProgramError {
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fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
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write!(fmt, "{}", self.0)
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}
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let args = Args::parse();
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let mut file = File::open(&args.path)?;
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let mut contents = String::new();
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file.read_to_string(&mut contents)?;
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let mut parser = parser::Parser::new(contents, &args.path)?;
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let ast = parser.parse_all()?;
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if parser.was_error() {
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return Err(ProgramError("error occurred, exiting".to_string()).into());
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}
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// initialize type system
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obj::init_types();
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// compile
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let (chunk, constants, globals) = compiler::Compiler::default().compile(&ast)?;
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if args.disassemble {
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disassemble::disassemble(&chunk, &constants, &globals);
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return Ok(());
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}
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// run
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let mut vm = vm::Vm::new(chunk.into(), constants, globals);
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vm.run();
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Ok(())
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}
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