static constructor in Dart

Question

How to write static constructor in Dart?

class Generator
{
   static List<Type> typesList = [];

   //static
   //{ /*static initializations*/}

}

Answer 1

There is no such thing as a static constructor in Dart. Named constructors such as Shape.circle() are achieved by something like

class A {
  A() {
    print('default constructor');
  }
  A.named() {
    print('named constructor');
  }
}

void main() {
  A();
  A.named();
}

You might also be interested in this factory constructors question

Update: A couple of static initializer work-arounds

class A {
  static const List<Type> typesList = [];
  A() {
    if (typesList.isEmpty) {
      // initialization...
    }
  }
}

Or the static stuff can be moved out of the class if it isn't meant to be accessed by users of the class.

const List<Type> _typesList = [];
void _initTypes() {}

class A {
  A() {
    if (_typesList.isEmpty) _initTypes();
  }
}