// run-pass use std::fmt::Debug; use std::default::Default; trait MyTrait { fn get(&self) -> T; } impl MyTrait for T where T : Default { fn get(&self) -> T { Default::default() } } #[derive(Copy, Clone)] struct MyType { dummy: usize } impl MyTrait for MyType { fn get(&self) -> usize { self.dummy } } fn test_eq(m: M, v: T) where T : Eq + Debug, M : MyTrait { assert_eq!(m.get(), v); } pub fn main() { test_eq(22_usize, 0_usize); let value = MyType { dummy: 256 + 22 }; test_eq(value, value.dummy); }