impl eq

gistfile1

struct A {n: uint}

impl A: cmp::Eq {
    pure fn eq(other: &A) -> bool {
        self.n == other.n
    }
    pure fn ne(other: &A) -> bool {
        !self.eq(other)
    }
}

fn main() {
    let a = A {n: 1};
    let b = A {n: 2};
    if a == b {
        io::println("eq");
    } else {
        io::println("ne");
    }
}