fn_ops

Documentation

Temporary traits for function operator overloading, pending the stabilization of Fn, FnMut, and FnOnce.

```rust use fn_ops::*;

struct IsMultipleOf(i32);

impl FnOnce<(i32, i32)> for IsMultipleOf { type Output = bool;

fn call_once(self, (x, y): (i32, i32)) -> bool { self.call((x, y)) }

}

impl FnMut<(i32, i32)> for IsMultipleOf { fn call_mut(&mut self, (x, y): (i32, i32)) -> bool { self.call((x, y)) } }

impl Fn<(i32, i32)> for IsMultipleOf { fn call(&self, (x, y): (i32, i32)) -> bool { x * self.0 == y } }

fn assert_fn>(args: Args, f: F) { assert!(f.call(args)) }

assertfn((1, 2), IsMultipleOf(2)); assertfn((1, 2, 3), |x, y, z| x != y && y != z && z != x); ```