rhai/examples/simple_fn.rs
2022-02-12 12:41:04 +08:00

20 lines
381 B
Rust

//! An example showing how to register a simple Rust function.
use rhai::{Engine, EvalAltResult};
fn add(x: i64, y: i64) -> i64 {
x + y
}
fn main() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
engine.register_fn("add", add);
let result = engine.eval::<i64>("add(40, 2)")?;
println!("Answer: {}", result); // prints 42
Ok(())
}