32 lines
679 B
Rust
32 lines
679 B
Rust
//@ run-pass
|
|
|
|
// rpass test for reservation impls. Not 100% required because `From` uses them,
|
|
// but still.
|
|
|
|
//@ revisions: old next
|
|
//@[next] compile-flags: -Znext-solver
|
|
|
|
#![feature(rustc_attrs)]
|
|
|
|
use std::mem;
|
|
|
|
trait MyTrait<S> {
|
|
fn foo(&self, s: S) -> usize;
|
|
}
|
|
|
|
#[rustc_reservation_impl = "foo"]
|
|
impl<T> MyTrait<u64> for T {
|
|
fn foo(&self, _x: u64) -> usize { 0 }
|
|
}
|
|
|
|
// reservation impls don't create coherence conflicts, even with
|
|
// non-chain overlap.
|
|
impl<S> MyTrait<S> for u32 {
|
|
fn foo(&self, _x: S) -> usize { mem::size_of::<S>() }
|
|
}
|
|
|
|
fn main() {
|
|
// ...and the non-reservation impl gets picked.XS
|
|
assert_eq!(0u32.foo(0u64), mem::size_of::<u64>());
|
|
}
|