| // Test that we give suitable error messages when the user attempts to |
| // impl a trait `Trait` for its own object type. |
| |
| // revisions: old re |
| |
| #![cfg_attr(re, feature(re_rebalance_coherence))] |
| |
| trait Foo { fn dummy(&self) { } } |
| trait Bar: Foo { } |
| trait Baz: Bar { } |
| |
| // Supertraits of Baz are not legal: |
| impl Foo for dyn Baz { } |
| //[old]~^ ERROR E0371 |
| //[re]~^^ ERROR E0371 |
| impl Bar for dyn Baz { } |
| //[old]~^ ERROR E0371 |
| //[re]~^^ ERROR E0371 |
| impl Baz for dyn Baz { } |
| //[old]~^ ERROR E0371 |
| //[re]~^^ ERROR E0371 |
| |
| // But other random traits are: |
| trait Other { } |
| impl Other for dyn Baz { } // OK, Other not a supertrait of Baz |
| |
| fn main() { } |
