manual-ok-err

Prefer Result projection methods over equivalent pattern matching

Branching on a Result to select one payload or undefined manually projects the Result.
Instead, you SHOULD use ok or err to project the selected payload.

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

Reported

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

function value(result: Result<int32, string>): int32 | undefined {
    return result.ok();
}
Prior art

- Clippy · manualokerr

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