Language/Generics/Superbounded_types/function_A01_t06.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion Any use of a type [T] which is not well-bounded is a
/// compile-time error.
/// @description Checks that compile error is thrown when call generic
/// function with two dependant type parameters which are not bounded well.
/// @Issue 37061
/// @author iarkh@unipro.ru


class A<X extends A<X>> {}
void testme<X extends Y, Y extends A<X>>() {}

main() {
  testme();                   //# 01: compile-time error

  testme<Never, dynamic>();    //# 02: compile-time error
  testme<dynamic, Never>();    //# 03: compile-time error
  testme<dynamic, dynamic>(); //# 04: compile-time error

  testme<Null, Object?>();    //# 05: compile-time error
  testme<Object, Null>();     //# 06: compile-time error
  testme<Object, Object?>();  //# 07: compile-time error

  testme<Null, void>();       //# 08: compile-time error
  testme<void, Null>();       //# 09: compile-time error
  testme<void, void>();       //# 10: compile-time error

  testme<A<Null>, Null>();    //# 11: compile-time error
}