prefer-private-named-parameters

v1.38.0

style

effort: 2m

configurable

has IDE fix

has auto-fix

pro+

Suggests using private named parameters instead of assigning to a private class field manually.

⚙️ Config

Set only-same-name (default is true) to highligh parameters that match the field name.

analysis_options.yaml

dcm:
  rules:
    - prefer-private-named-parameters:
        only-same-name: true

Example

❌ Bad:

class Point {
  final double _x;

  // LINT: Prefer using private named parameters instead of assigning to the private field manually.
  Point({required double x}) : _x = x;
}

✅ Good:

class Point {
  final double _x;

  Point({required this._x});
}

class PointPrivateAssert {
  final double _x;

  PointPrivateAssert({required double? x}) : assert(x >= 0), _x = x ?? 0;
}