90 lines
1.6 KiB
Rust
90 lines
1.6 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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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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#[warn(clippy::cmp_owned)]
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#[allow(clippy::unnecessary_operation)]
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fn main() {
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fn with_to_string(x : &str) {
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x != "foo".to_string();
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"foo".to_string() != x;
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}
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let x = "oh";
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with_to_string(x);
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x != "foo".to_owned();
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x != String::from("foo");
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42.to_string() == "42";
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Foo.to_owned() == Foo;
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"abc".chars().filter(|c| c.to_owned() != 'X');
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"abc".chars().filter(|c| *c != 'X');
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let x = &Baz;
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let y = &Baz;
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y.to_owned() == *x;
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let x = &&Baz;
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let y = &Baz;
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y.to_owned() == **x;
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}
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struct Foo;
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impl PartialEq for Foo {
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fn eq(&self, other: &Self) -> bool {
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self.to_owned() == *other
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}
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}
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impl ToOwned for Foo {
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type Owned = Bar;
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fn to_owned(&self) -> Bar {
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Bar
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}
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}
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#[derive(PartialEq)]
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struct Bar;
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impl PartialEq<Foo> for Bar {
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fn eq(&self, _: &Foo) -> bool {
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true
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}
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}
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impl std::borrow::Borrow<Foo> for Bar {
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fn borrow(&self) -> &Foo {
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static FOO: Foo = Foo;
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&FOO
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}
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}
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#[derive(PartialEq)]
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struct Baz;
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impl ToOwned for Baz {
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type Owned = Baz;
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fn to_owned(&self) -> Baz {
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Baz
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}
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}
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