1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 pub trait MakeRef<'a> {
14 impl<'a, T: 'a> MakeRef<'a> for T {
21 impl<'a, T: 'a> MakeRef2 for T {
22 //~^ ERROR the lifetime parameter `'a` is not constrained
23 type Ref2 = <T as MakeRef<'a>>::Ref;
26 fn foo() -> <String as MakeRef2>::Ref2 { &String::from("foo") }
29 println!("{}", foo());