72 lines
1.5 KiB
Rust
72 lines
1.5 KiB
Rust
use std::env;
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use std::fs;
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use std::io;
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use std::io::Write;
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use std::process;
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mod rlox;
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mod scanner;
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mod token_type;
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mod token;
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use crate::rlox::RLox;
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use crate::scanner::Scanner;
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// Exit codes from #include <sysexits.h>
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const EX_OK: i32 = 0;
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const EX_DATAERR: i32 = 65;
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const EX_USAGE : i32 = 66;
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fn main() {
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let args: Vec<String> = env::args().collect();
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let exit_code = match args.len() {
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1 => run_prompt(),
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2 => run_file(&args[1]),
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_ => {
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println!("Usage : rlox [script]");
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EX_USAGE
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}
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};
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process::exit(exit_code);
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}
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fn run_file( file_path: &str ) -> i32 {
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let contents = fs::read_to_string(file_path)
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.expect(&format!("Should have been able to read the file {file_path}"));
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run(contents)
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}
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fn run_prompt() -> i32 {
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let mut exit_code = EX_OK;
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loop {
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print!("> ");
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io::stdout().flush().expect("Unable to flush stdout");
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let mut line = String::new();
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io::stdin()
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.read_line(&mut line)
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.expect("Failed to read line");
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if line.trim().is_empty() {
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break;
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}
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exit_code = run(line);
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}
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exit_code
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}
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fn run( script: String ) -> i32 {
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let rlox_interpreter = RLox { had_error: false };
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if rlox_interpreter.had_error { EX_DATAERR } else { EX_OK }
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}
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// Implémentations de référence :
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// https://github.com/munificent/craftinginterpreters/wiki/Lox-implementations#rust
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// Pause :
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// http://www.craftinginterpreters.com/scanning.html#lexical-errors
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