manual-unwrap-or

Prefer Result fallback methods over equivalent pattern matching

Branching on a Result to select its successful payload or a fallback manually unwraps the Result.
Instead, you SHOULD use unwrapOr for eager values or unwrapOrElse for computed fallbacks.

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

Reported

function value(result: Result<int32, string>): int32 {
    return match (result) {
        Ok { value } => value
        Err { error: _ } => 0
    };
}
Accepted

function value(result: Result<int32, string>): int32 {
    return result.unwrapOr(0);
}
Prior art

- Clippy · manualunwrapor

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