//@ run-pass use std::fmt::Debug; trait MyTrait { fn get(&self) -> T; } #[derive(Copy, Clone)] struct MyType { dummy: usize } impl MyTrait for MyType { fn get(&self) -> usize { self.dummy } } impl MyTrait for MyType { fn get(&self) -> u8 { self.dummy as u8 } } fn test_eq(m: M, v: T) where T : Eq + Debug, M : MyTrait { assert_eq!(m.get(), v); } pub fn main() { let value = MyType { dummy: 256 + 22 }; test_eq::(value, value.dummy); test_eq::(value, value.dummy as u8); }