no-lonely-if

Disallow an if statement as the only statement in an else block

else { if (condition) ... } has the same control flow as else if (condition) ... when the block contains no other statements.
Instead, you SHOULD flatten the nested if into the existing conditional chain.

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

Reported

function classify(value: int32): string {
    if (value > 0) {
        return "positive";
    } else {
        if (value < 0) {
            return "negative";
        }
    }
    return "zero";
}
Accepted

function classify(value: int32): string {
    if (value > 0) {
        return "positive";
    } else if (value < 0) {
        return "negative";
    }
    return "zero";
}
Prior art

- ESLint · no-lonely-if

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