RS.CLIPPY.UNNECESSARY_WRAPS

Functions that only return `Ok` or `Some`

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

What it does

Checks for private functions that only return Ok or Some.

Why is this bad?

It is not meaningful to wrap values when no None or Err is returned.

Known problems

There can be false positives if the function signature is designed to fit some external requirement.

Example

fn get_cool_number(a: bool, b: bool) -> Option<i32> {
    if a && b {
        return Some(50);
    }
    if a {
        Some(0)
    } else {
        Some(10)
    }
}

Use instead:

fn get_cool_number(a: bool, b: bool) -> i32 {
    if a && b {
        return 50;
    }
    if a {
        0
    } else {
        10
    }
}

Configuration

avoid-breaking-exported-api: Suppress lints whenever the suggested change would cause breakage for other crates.

(default: true)