use_super_parameters

Parameter '{0}' could be a super parameter.

Parameters '{0}' could be super parameters.

The analyzer produces this diagnostic when a parameter to a constructor is passed to a super constructor without being referenced or modified and a super parameter isn't used.

The following code produces this diagnostic because the parameters of the constructor for B are only used as arguments to the super constructor:

class A {
  A({int? x, int? y});
}
class B extends A {
  B({int? x, int? y}) : super(x: x, y: y);
}

Use a super parameter to pass the arguments:

class A {
  A({int? x, int? y});
}
class B extends A {
  B({super.x, super.y});
}

Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-08. View source or report an issue.