gistfile1.txt

iface addable { fn plus(n: int) -> int; }
iface subtractable { fn minus(n: int) -> int; }

impl of addable for int {
    fn plus(n: int) -> int { self + n }
    fn minus(n: int) -> int { self - n }
}

impl of subtractable for int {
    fn minus(n: int) -> uint { self - n as uint }
}

fn main() { assert 3.plus(1) == 5.minus(1); } // error: multiple applicable methods in scope