| // Copyright 2018 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. |
| |
| // run-pass |
| // regression test for issue #50825 |
| // Make sure that the `impl` bound (): X<T = ()> is preferred over |
| // the (): X bound in the where clause. |
| |
| trait X { |
| type T; |
| } |
| |
| trait Y<U>: X { |
| fn foo(x: &Self::T); |
| } |
| |
| impl X for () { |
| type T = (); |
| } |
| |
| impl<T> Y<Vec<T>> for () where (): Y<T> { |
| fn foo(_x: &()) {} |
| } |
| |
| fn main () {} |
