3 // rpass test for reservation impls. Not 100% required because `From` uses them,
6 #![feature(rustc_attrs)]
11 fn foo(&self, s: S) -> usize;
14 #[rustc_reservation_impl = "foo"]
15 impl<T> MyTrait<u64> for T {
16 fn foo(&self, _x: u64) -> usize { 0 }
19 // reservation impls don't create coherence conflicts, even with
21 impl<S> MyTrait<S> for u32 {
22 fn foo(&self, _x: S) -> usize { mem::size_of::<S>() }
26 // ...and the non-reservation impl gets picked.XS
27 assert_eq!(0u32.foo(0u64), mem::size_of::<u64>());