| // run-pass |
| #![allow(dead_code)] |
| #![allow(unused_variables)] |
| // Test what happens when a HR obligation is applied to an impl with |
| // "outlives" bounds. Currently we're pretty conservative here; this |
| // will probably improve in time. |
| |
| trait Foo<X> { |
| fn foo(&self, x: X) { } |
| } |
| |
| fn want_foo<T>() |
| where T : for<'a> Foo<&'a isize> |
| { |
| } |
| |
| // Expressed as a where clause |
| |
| struct SomeStruct<X> { |
| x: X |
| } |
| |
| impl<'a,X> Foo<&'a isize> for SomeStruct<X> |
| where X : 'a |
| { |
| } |
| |
| fn one() { |
| want_foo::<SomeStruct<usize>>(); |
| } |
| |
| // Expressed as shorthand |
| |
| struct AnotherStruct<X> { |
| x: X |
| } |
| |
| impl<'a,X:'a> Foo<&'a isize> for AnotherStruct<X> |
| { |
| } |
| |
| fn two() { |
| want_foo::<AnotherStruct<usize>>(); |
| } |
| |
| fn main() { } |