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src/test/compile-fail/issue-21659-show-relevant-trait-impls-2.rs
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// 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. | ||
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trait Foo<A> { | ||
fn foo(&self, a: A) -> A { | ||
a | ||
} | ||
} | ||
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trait NotRelevant<A> { | ||
fn nr(&self, a: A) -> A { | ||
a | ||
} | ||
} | ||
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struct Bar; | ||
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impl Foo<i8> for Bar {} | ||
impl Foo<i16> for Bar {} | ||
impl Foo<i32> for Bar {} | ||
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impl Foo<u8> for Bar {} | ||
impl Foo<u16> for Bar {} | ||
impl Foo<u32> for Bar {} | ||
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impl NotRelevant<usize> for Bar {} | ||
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fn main() { | ||
let f1 = Bar; | ||
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f1.foo(1usize); | ||
//~^ error: the trait `Foo<usize>` is not implemented for the type `Bar` | ||
// | help: the following implementations were found: | ||
// | help: Foo<i8> | ||
// | help: Foo<i16> | ||
// | help: Foo<i32> | ||
// | help: Foo<u8> | ||
// | help: and 2 others | ||
} |
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src/test/compile-fail/issue-21659-show-relevant-trait-impls-3.rs
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// 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. | ||
|
||
trait Foo<A> { | ||
fn foo(&self, a: A) -> A { | ||
a | ||
} | ||
} | ||
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trait NotRelevant<A> { | ||
fn nr(&self, a: A) -> A { | ||
a | ||
} | ||
} | ||
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struct Bar; | ||
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impl NotRelevant<usize> for Bar {} | ||
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fn main() { | ||
let f1 = Bar; | ||
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f1.foo(1usize); | ||
//~^ error: method named `foo` found for type `Bar` in the current scope | ||
//~| help: items from traits can only be used if the trait is implemented and in scope | ||
//~| help: candidate #1: `Foo` | ||
} |