4aca540018
This patch allows overlap to occur between any two impls of a trait for traits which have no associated items. Several compile-fail tests around coherence had to be changed to add at least one item to the trait they test against. Ref #29864
31 lines
913 B
Rust
31 lines
913 B
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(optin_builtin_traits)]
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trait MyTrait { fn foo() {} }
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impl MyTrait for .. {}
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//~^ ERROR redundant default implementations of trait `MyTrait`
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impl MyTrait for .. {}
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trait MySafeTrait {}
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unsafe impl MySafeTrait for .. {}
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//~^ ERROR implementing the trait `MySafeTrait` is not unsafe
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unsafe trait MyUnsafeTrait {}
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impl MyUnsafeTrait for .. {}
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//~^ ERROR the trait `MyUnsafeTrait` requires an `unsafe impl` declaration
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fn main() {}
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