RS.CLIPPY.PTR_EQ

Use `std::ptr::eq` when comparing raw pointers

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

What it does

Use std::ptr::eq when applicable

Why is this bad?

ptr::eq can be used to compare &T references (which coerce to *const T implicitly) by their address rather than comparing the values they point to.

Example

let a = &[1, 2, 3];
let b = &[1, 2, 3];

assert!(a as *const _ as usize == b as *const _ as usize);

Use instead:

let a = &[1, 2, 3];
let b = &[1, 2, 3];

assert!(std::ptr::eq(a, b));