no-needless-match

Disallow matches that reconstruct their scrutinee unchanged

A match whose every arm returns the exact value selected by its pattern leaves the scrutinee unchanged.
Instead, you SHOULD use the scrutinee directly.

- Category: style
- Level: warning
- Fix: automatic
- Scope: module

Reported

function preserve(value: int32): int32 {
    return match (value) {
        0 => 0
        1 => 1
        value => value
    };
}
Accepted

function preserve(value: int32): int32 {
    return value;
}
Prior art

- Clippy · needlessmatch

language/linter/src/rules/style/noneedlessmatch.rs:8