Suggest `let...else` with `return` over `match` with `return`

[frewsxcv]

What it does

Utilizes the new let...else syntax when the user returns in the non-unwrapping case

Lint Name

let-else-return

Category

style

Advantage

More concise

Drawbacks

No response

Example

let n = match some_option {
    Some(n) => n,
    None => return something_else,
};

Or

let n = if let Some(n) = some_option {
    n
} else {
    return something_else;
};

Could be written as:

let Some(n) = some_option else {
    return something_else,
};

Ideally this would also work with Result.

[est31]

I think you are looking for #8437. It is not in nightly yet, but will be after the the next clippy bump.