rhai/examples/rhai_runner.rs

use rhai::{Engine, RegisterFn};
use std::env;
use std::fmt::Display;

fn showit<T: Display>(x: &mut T) -> () {
    println!("{}", x)
}

fn main() {
    for fname in env::args().skip(1) {
        let mut engine = Engine::new();

        engine.register_fn("print", showit as fn(x: &mut i32) -> ());
        engine.register_fn("print", showit as fn(x: &mut i64) -> ());
        engine.register_fn("print", showit as fn(x: &mut u32) -> ());
        engine.register_fn("print", showit as fn(x: &mut u64) -> ());
        engine.register_fn("print", showit as fn(x: &mut f32) -> ());
        engine.register_fn("print", showit as fn(x: &mut f64) -> ());
        engine.register_fn("print", showit as fn(x: &mut bool) -> ());
        engine.register_fn("print", showit as fn(x: &mut String) -> ());

        match engine.eval_file::<()>(&fname) {
            Ok(_) => (),
            Err(e) => println!("Error: {}", e),
        }
    }
}