enum E {
  one,
  two.named(),
  three.f(),
  four.f2();

  const E();
  const E.named() : this();
  factory E.f() => values.first;
  factory E.f2() {
    return const E();
  }
  const factory E.f3() = E;
  factory E.f4() = E;
  factory E.f5() = E.f;
  factory E.f6(int value) = E.f;
}

main() {}
test() {}