RS.CLIPPY.PARTIALEQ_NE_IMPL

Re-implementing `PartialEq::ne`

This checker is a Clippy lint created by The Rust Project Contributors. The documentation shown here is a copy of the original documentation for: partialeq_ne_impl. Copyright ©2025 The Rust Team. All rights reserved.

What it does

Checks for manual re-implementations of PartialEq::ne.

Why is this bad?

PartialEq::ne is required to always return the negated result of PartialEq::eq, which is exactly what the default implementation does. Therefore, there should never be any need to re-implement it.

Example

struct Foo;

impl PartialEq for Foo {
    fn eq(&self, other: &Foo) -> bool { true }
    fn ne(&self, other: &Foo) -> bool { !(self == other) }
}