rust/tests/ui/cmp_owned.rs
Matthias Krüger 435299be30 rustfmt tests
2018-12-09 23:26:16 +01:00

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
}
}