rust-default-methods-ex0.rs

enum Color { cyan, magenta, yellow, black }

impl Eq for Color {
    fn eq(&self, other: &Color) -> bool {
        match (*self, *other) {
            (cyan, cyan)       => { true  }
            (magenta, magenta) => { true  }
            (yellow, yellow)   => { true  }
            (black, black)     => { true  }
            _                  => { false }
        }
    }
}

fn main() {
    println(fmt!("%?, %?", cyan == yellow, cyan == cyan));
}