| // run-pass |
| #![allow(dead_code)] |
| // 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")); |
| } |