| // 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 give suitable error messages when the user attempts to |
| // impl a trait `Trait` for its own object type. |
| |
| trait Foo { fn dummy(&self) { } } |
| trait Bar: Foo { } |
| trait Baz: Bar { } |
| |
| // Supertraits of Baz are not legal: |
| impl Foo for Baz { } //~ ERROR E0371 |
| impl Bar for Baz { } //~ ERROR E0371 |
| impl Baz for Baz { } //~ ERROR E0371 |
| |
| // But other random traits are: |
| trait Other { } |
| impl Other for Baz { } // OK, Other not a supertrait of Baz |
| |
| fn main() { } |
