Contents

prefer_constructors_over_static_methods

Contents

Prefer defining constructors instead of static methods to create instances.

This rule is available as of Dart 2.0.

Details

#

PREFER defining constructors instead of static methods to create instances.

In most cases, it makes more sense to use a named constructor rather than a static method because it makes instantiation clearer.

BAD:

dart
class Point {
  num x, y;
  Point(this.x, this.y);
  static Point polar(num theta, num radius) {
    return Point(radius * math.cos(theta),
        radius * math.sin(theta));
  }
}

GOOD:

dart
class Point {
  num x, y;
  Point(this.x, this.y);
  Point.polar(num theta, num radius)
      : x = radius * math.cos(theta),
        y = radius * math.sin(theta);
}

Usage

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To enable the prefer_constructors_over_static_methods rule, add prefer_constructors_over_static_methods under linter > rules in your analysis_options.yaml file:

analysis_options.yaml
yaml
linter:
  rules:
    - prefer_constructors_over_static_methods