RS.CLIPPY.NEEDLESS_OPTION_TAKE

Using `.as_ref().take()` on a temporary value

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

What it does

Checks for calling take function after as_ref.

Why is this bad?

Redundant code. take writes None to its argument. In this case the modification is useless as it's a temporary that cannot be read from afterwards.

Example

let x = Some(3);
x.as_ref().take();

Use instead:

let x = Some(3);
x.as_ref();