LanguageFeatures/nnbd/weak/type-aliases/generics_A01_t03.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 The default bound of generic type parameters is treated as
 * [Object?].
 * @description It seems like it is not possible to obtain the value of the
 * default bound at runtime, we can only obtain the result of instantiation to
 * bound. So the test checks that if generic type parameter of non-function
 * typedef is not clearly specified, it is treated as [dynamic] at runtime.
 * See also co19 issue #530.
 * @Issue 40367, 40368
 * @author iarkh@unipro.ru
 */
// SharedOptions=--enable-experiment=nonfunction-type-aliases
// Requirements=nnbd-weak

import "../../../../Utils/expect.dart";

class A<T> {}
typedef AAlias<T> = A<T>;

class B<T1, T2, T3> {}
typedef BAlias<T1, T2, T3> = B<T1, T2, T3>;

main() {
  Expect.equals(typeOf<AAlias<dynamic>>(), typeOf<AAlias>());
  Expect.equals(typeOf<BAlias<dynamic, dynamic, dynamic>>(), typeOf<BAlias>());
}