prefer-match

Prefer match over switch statements and repeated equality chains

Repeated equality branches and switch cases encode selection as independent statements.
Instead, you SHOULD use match to bind the selected value and its cases in one expression.

- Category: style
- Level: warning
- Fix: none
- Scope: module

Reported

function describe(value: int32): string {
    if (value === 0) {
        return "zero";
    } else if (value === 1) {
        return "one";
    } else if (value === 2) {
        return "two";
    }

    return "many";
}
Accepted

function describe(value: int32): string {
    return match (value) {
        0 => "zero"
        1 => "one"
        2 => "two"
        _ => "many"
    };
}
language/linter/src/rules/style/prefermatch.rs:7