avoid-unnecessary-declaring-parameters

v1.40.0

style

effort: 2m

dart 3.13+

has IDE fix

has auto-fix

pro+

Suggests converting a declaring parameter to a regular parameter when it's not used outside of the primary constructor.

Example

❌ Bad:

// LINT: This declaring parameter can be converted to a regular parameter as it is not used outside the constructor.
//  Try removing the 'final' keyword.
class Primary(final String _value) {
  final another = _value;

  final String third;

  this : third = _value;
}

✅ Good:

class Primary(String _value) {
  final another = _value;

  final String third;

  this : third = _value;
}

class Another(final String _value) {
  void fn() {
    print(_value);
  }
}