| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // 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() { } |