e8253c7044
This creates a REPL which outputs compiled bytecode, constants, and VM results for code snippets. Change-Id: If63f79a961456afd6a4cdf59b994107ff7ab8b47 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6072 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Autosubmit: tazjin <tazjin@tvl.su>
54 lines
988 B
Rust
54 lines
988 B
Rust
use std::{
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env, fs,
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io::{self, Write},
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mem, process,
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};
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mod chunk;
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mod compiler;
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mod errors;
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mod eval;
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mod opcode;
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mod value;
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mod vm;
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fn main() {
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let mut args = env::args();
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if args.len() > 2 {
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println!("Usage: tvix-eval [script]");
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process::exit(1);
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}
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if let Some(file) = args.nth(1) {
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run_file(&file);
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} else {
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run_prompt();
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}
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}
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fn run_file(file: &str) {
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let contents = fs::read_to_string(file).expect("failed to read the input file");
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run(contents);
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}
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fn run_prompt() {
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let mut line = String::new();
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loop {
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print!("> ");
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io::stdout().flush().unwrap();
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io::stdin()
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.read_line(&mut line)
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.expect("failed to read user input");
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run(mem::take(&mut line));
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line.clear();
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}
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}
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fn run(code: String) {
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match eval::interpret(code) {
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Ok(result) => println!("=> {}", result),
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Err(err) => eprintln!("{}", err),
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}
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}
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