avoid-unnecessary-parentheses

v1.36.0

style

effort: 2m

has IDE fix

has auto-fix

pro+

Suggests removing unnecessary parentheses.

Example

❌ Bad:

void fn(List<int> input, List<int>? another) async {
  // LINT: Unnecessary parentheses. Try removing them.
  final _ = [...(input)];

  // LINT: Unnecessary parentheses. Try removing them.
  final _ = (input.isEmpty) ? true : false;

  final toolPath = another != null
      // LINT: Unnecessary parentheses. Try removing them.
      ? input.isEmpty ? input : (await input)
      // LINT: Unnecessary parentheses. Try removing them.
      : (input);
}

bool f(int a) {
  return (a.isEven); // LINT: Unnecessary parentheses. Try removing them.
}

✅ Good:

void fn(List<int> input, List<int>? another) async {
  final _ = [...input];
  final _ = input.isEmpty ? true : false;

  final toolPath = another != null
      ? input.isEmpty ? input : await input
      : input;
}

bool f(int a) {
  return a.isEven;
}

Related Rules

• prefer-parentheses-with-if-null