RS.CLIPPY.NEEDLESS_IF

Checks for empty if branches

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_if. Copyright ©2025 The Rust Team. All rights reserved.

What it does

Checks for empty if branches with no else branch.

Why is this bad?

It can be entirely omitted, and often the condition too.

Known issues

This will usually only suggest to remove the if statement, not the condition. Other lints such as no_effect will take care of removing the condition if it's unnecessary.

Example

if really_expensive_condition(&i) {}
if really_expensive_condition_with_side_effects(&mut i) {}

Use instead:

// <omitted>
really_expensive_condition_with_side_effects(&mut i);