any-fn

Dynamically-typed functions via core::any::Any in Rust.

Examples

Mutating a struct

use any_fn::{IntoAnyFn, value};

struct Foo {
    foo: usize,
}

fn foo(x: usize, y: &mut Foo) {
    y.foo = x;
}

let x = value(Foo { foo: 0 });

foo.into_any_fn().call(&[&value(42usize), &x]).unwrap();

assert_eq!(x.borrow().downcast_ref::<Foo>().unwrap().foo, 42);

Calling a function with unboxed, immutable reference, and mutable reference arguments

use any_fn::{IntoAnyFn, Ref, value};

fn foo(x: usize, y: &usize, z: &mut usize) {
    *z = x + *y;
}

let x = value(0usize);

<_ as IntoAnyFn<'_, (_, Ref<usize>, _), _>>::into_any_fn(foo)
    .call(&[&value(40usize), &value(2usize), &x])
    .unwrap();

assert_eq!(*x.borrow().downcast_ref::<usize>().unwrap(), 42);

License

MIT