blob: 60429ec9cce0f583f4d0fe5f331a51b26861218a [file] [log] [blame]
// @dart = 2.6
import 'package:expect/expect.dart';
abstract class A<T> {
A.empty();
factory A() = B<T, List<T>>;
}
abstract class B<U, W> extends A<U> {
B.empty() : super.empty();
factory B() = C<U, W, Map<U, W>>;
}
class C<V, S, R> extends B<V, S> {
C() : super.empty();
toString() => "${V},${S},${R}";
}
main() {}