Crate felys

Interface to customize Felys implementation

Examples

Make sure felys is added to your cargo.toml, and then try it out:

use std::collections::HashMap;

use felys::*;

fn main() {
    let code = "print('Hello, World');".to_string();

    // your customized built-in values and rust functions
    let mixin = HashMap::from([
        ("print".into(), Object::Rust(print))
    ]);

    // init the worker with mixin
    // no timeout
    // max recursive call is 100
    // English mode
    let mut main = Worker::new(mixin, 0.0, 100, Language::EN);
    if let Err(e) = main.exec(code) {
        println!("{}", e)
    }
}

// customize your own `print` function
fn print(cx: &mut Context) -> Output {
    let out = cx.args.iter()
        .map(|o| o.to_string())
        .collect::<Vec<String>>()
        .join(" ");
    println!("{}", out);
    Object::None.into()
}

Structs

• Context
  Abstraction of interaction with runtime environment
• Output
  Abstraction of return value from a rust function
• Summary
  Relevant outputs after one execution
• Worker
  Core interpreter entry point

Enums

• Language
  Available coding languages
• Object
  Union type of different data types