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