rune 0.14.1

The Rune Language, an embeddable dynamic programming language for Rust.
Documentation 
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fn do_thing(op) {
    op(1, 2)
}

fn add(a, b) {
    a + b
}

fn sub(a, b) {
    a - b
}

#[test]
fn test_function_pointer() {
    assert_eq!(do_thing(add), 3);
    assert_eq!(do_thing(sub), -1);
}