| // Copyright 2015 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 that we are handle to correctly handle a projection type |
| // that appears in a supertrait bound. Issue #20559. |
| |
| |
| trait A |
| { |
| type TA; |
| |
| fn dummy(&self) { } |
| } |
| |
| trait B<TB> |
| { |
| fn foo (&self, t : TB) -> String; |
| } |
| |
| trait C<TC : A> : B<<TC as A>::TA> { } |
| |
| struct X; |
| |
| impl A for X |
| { |
| type TA = i32; |
| } |
| |
| struct Y; |
| |
| impl C<X> for Y { } |
| |
| // Both of these impls are required for successful compilation |
| impl B<i32> for Y |
| { |
| fn foo (&self, t : i32) -> String |
| { |
| format!("First {}", t) |
| } |
| } |
| |
| fn main () |
| { |
| let y = Y; |
| assert_eq!(y.foo(5), format!("First 5")); |
| } |