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