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1 | // Copyright 2016 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. | |
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 | ||
b7449926 XL |
11 | // run-pass |
12 | ||
54a0048b SL |
13 | // Test that impls on projected self types can resolve overlap, even when the |
14 | // projections involve specialization, so long as the associated type is | |
15 | // provided by the most specialized impl. | |
16 | ||
17 | #![feature(specialization)] | |
18 | ||
19 | trait Assoc { | |
20 | type Output; | |
21 | } | |
22 | ||
23 | impl<T> Assoc for T { | |
24 | default type Output = bool; | |
25 | } | |
26 | ||
27 | impl Assoc for u8 { type Output = u8; } | |
28 | impl Assoc for u16 { type Output = u16; } | |
29 | ||
30 | trait Foo {} | |
31 | impl Foo for u32 {} | |
32 | impl Foo for <u8 as Assoc>::Output {} | |
33 | impl Foo for <u16 as Assoc>::Output {} | |
34 | ||
35 | fn main() {} |