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1a4d82fc | 1 | // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
223e47cc LB |
2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
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. | |
10 | ||
85aaf69f SL |
11 | // Regression test for issue #22246 -- we should be able to deduce |
12 | // that `&'a B::Owned` implies that `B::Owned : 'a`. | |
223e47cc | 13 | |
c34b1796 AL |
14 | // pretty-expanded FIXME #23616 |
15 | ||
85aaf69f | 16 | #![allow(dead_code)] |
1a4d82fc | 17 | |
85aaf69f SL |
18 | use std::ops::Deref; |
19 | ||
20 | pub trait ToOwned { | |
21 | type Owned: Borrow<Self>; | |
22 | fn to_owned(&self) -> Self::Owned; | |
23 | } | |
24 | ||
25 | pub trait Borrow<Borrowed> { | |
26 | fn borrow(&self) -> &Borrowed; | |
27 | } | |
28 | ||
29 | pub struct Foo<B:ToOwned> { | |
30 | owned: B::Owned | |
31 | } | |
32 | ||
33 | fn foo<B:ToOwned>(this: &Foo<B>) -> &B { | |
34 | this.owned.borrow() | |
35 | } | |
223e47cc LB |
36 | |
37 | fn main() { } |