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#[allow(clippy::unnecessary_operation)]
#[allow(clippy::implicit_clone)]
fn main() {
let x = &Baz;
let y = &Baz;
y.to_owned() == *x;
//~^ ERROR: this creates an owned instance just for comparison
//~| NOTE: `-D clippy::cmp-owned` implied by `-D warnings`
let x = &&Baz;
let y = &Baz;
y.to_owned() == **x;
//~^ ERROR: this creates an owned instance just for comparison
let x = 0u32;
let y = U32Wrapper(x);
let _ = U32Wrapper::from(x) == y;
}
struct Foo;
impl PartialEq for Foo {
fn eq(&self, other: &Self) -> bool {
self.to_owned() == *other
//~^ ERROR: this creates an owned instance just for comparison
}
}
impl ToOwned for Foo {
type Owned = Bar;
fn to_owned(&self) -> Bar {
Bar
}
}
#[derive(PartialEq, Eq)]
struct Baz;
impl ToOwned for Baz {
type Owned = Baz;
fn to_owned(&self) -> Baz {
Baz
}
}
#[derive(PartialEq, Eq)]
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(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
struct U32Wrapper(u32);
impl From<u32> for U32Wrapper {
fn from(x: u32) -> Self {
Self(x)
}
}
impl PartialEq<u32> for U32Wrapper {
fn eq(&self, other: &u32) -> bool {
self.0 == *other
}
}
impl PartialEq<U32Wrapper> for u32 {
fn eq(&self, other: &U32Wrapper) -> bool {
*self == other.0
}
}
|
