gistfile1.rs

trait Foo {
    fn foo(_: Self) -> int {
        42
    }
}

struct Baz;
impl Foo for Baz { }

struct Bar { x: int }

impl Foo for Bar {
    fn foo(b: Bar) -> int { b.x }
}

pub fn main() {
    let bar = Bar { x: 12 };
    let x = Foo::foo(bar);
    println!("{}", x);

    let baz = Baz;
    let x = Foo::foo(baz);
    println!("{}", x);
}