31 lines
887 B
Rust
31 lines
887 B
Rust
// Copyright 2014 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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// Test that a where clause attached to a method allows us to add
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// additional constraints to a parameter out of scope.
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struct Foo<T> {
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value: T
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}
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struct Bar; // does not implement Eq
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impl<T> Foo<T> {
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fn equals(&self, u: &Foo<T>) -> bool where T : Eq {
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self.value == u.value
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}
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}
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fn main() {
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let x = Foo { value: Bar };
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x.equals(&x);
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//~^ ERROR `Bar: std::cmp::Eq` is not satisfied
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}
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