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