examples/repl.rs


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//! This example shows a simple read-evaluate-print-loop (REPL).

extern crate rlua;

use rlua::*;
use std::io::prelude::*;
use std::io::{stdin, stdout, stderr, BufReader};

fn main() {
    let lua = Lua::new();
    let mut stdout = stdout();
    let mut stdin = BufReader::new(stdin());

    loop {
        write!(stdout, "> ").unwrap();
        stdout.flush().unwrap();

        let mut line = String::new();
        stdin.read_line(&mut line).unwrap();

        match lua.eval::<LuaMultiValue>(&line) {
            Ok(values) => {
                println!("{}", values.iter().map(|value| format!("{:?}", value)).collect::<Vec<_>>().join("\t"));
            }
            Err(e) => {
                writeln!(stderr(), "error: {}", e).unwrap();
            }
        }
    }
}