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oxc/only-used-in-recursion Correctness

✅ This rule is turned on by default.

⚠️🛠️ A dangerous auto-fix is available for this rule.

What it does

Checks for arguments that are only used in recursion with no side-effects.

Inspired by the only_used_in_recursion rule in Clippy.

Why is this bad?

Supplying an argument that is only used in recursive calls is likely a mistake.

It increases cognitive complexity and may impact performance.

Examples

Examples of incorrect code for this rule:

function test(onlyUsedInRecursion) {
  return test(onlyUsedInRecursion);
}

Examples of correct code for this rule:

function f(a: number): number {
  if (a == 0) {
    return 1;
  } else {
    return f(a - 1);
  }
}

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)

{
  "rules": {
    "oxc/only-used-in-recursion": "error"
  }
}

CLI

oxlint --deny oxc/only-used-in-recursion

References

• Rule Source