rust/tests/ui/partialeq_ne_impl.rs

#![allow(dead_code)]

struct Foo;

impl PartialEq for Foo {
    fn eq(&self, _: &Foo) -> bool {
        true
    }
    fn ne(&self, _: &Foo) -> bool {
        //~^ ERROR: re-implementing `PartialEq::ne` is unnecessary
        //~| NOTE: `-D clippy::partialeq-ne-impl` implied by `-D warnings`
        false
    }
}

struct Bar;

impl PartialEq for Bar {
    fn eq(&self, _: &Bar) -> bool {
        true
    }
    #[allow(clippy::partialeq_ne_impl)]
    fn ne(&self, _: &Bar) -> bool {
        false
    }
}

fn main() {}