mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-22 14:55:26 +00:00
21 lines
485 B
Rust
21 lines
485 B
Rust
// 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 dyn Baz { }
|
|
//~^ ERROR E0371
|
|
impl Bar for dyn Baz { }
|
|
//~^ ERROR E0371
|
|
impl Baz for dyn Baz { }
|
|
//~^ ERROR E0371
|
|
|
|
// But other random traits are:
|
|
trait Other { }
|
|
impl Other for dyn Baz { } // OK, Other not a supertrait of Baz
|
|
|
|
fn main() { }
|