RS.CLIPPY.REF_OPTION_REF

Use `Option<&T>` instead of `&Option<&T>`

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

What it does

Checks for usage of &Option<&T>.

Why is this bad?

Since & is Copy, it's useless to have a reference on Option<&T>.

Known problems

It may be irrelevant to use this lint on public API code as it will make a breaking change to apply it.

Example

let x: &Option<&u32> = &Some(&0u32);

Use instead:

let x: Option<&u32> = Some(&0u32);