| // 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 a case where you have an impl of `Foo<X>` for all `X` that |
| // is being applied to `for<'a> Foo<&'a mut X>`. Issue #19730. |
| |
| trait Foo<X> { |
| fn foo(&self, x: X) { } |
| } |
| |
| fn want_hrtb<T>() |
| where T : for<'a> Foo<&'a isize> |
| { |
| } |
| |
| // AnyInt implements Foo<&'a isize> for any 'a, so it is a match. |
| struct AnyInt; |
| impl<'a> Foo<&'a isize> for AnyInt { } |
| fn give_any() { |
| want_hrtb::<AnyInt>() |
| } |
| |
| // StaticInt only implements Foo<&'static isize>, so it is an error. |
| struct StaticInt; |
| impl Foo<&'static isize> for StaticInt { } |
| fn give_static() { |
| want_hrtb::<StaticInt>() //~ ERROR `for<'a> StaticInt: Foo<&'a isize>` is not satisfied |
| } |
| |
| fn main() { } |