LanguageFeatures/nnbd/weak/generics_A01_t08.dart

 // Copyright (c) 2020, 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 type parameter of the generic function
/// alias is not clearly specified, it is treated as [dynamic] at runtime.
///
/// See also co19 issue #530.
/// @Issue 40367, 40368
///
/// @author iarkh@unipro.ru

 // Requirements=nnbd-weak

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

typedef T    Function1<T>();
typedef void Function2<T>(T);
typedef T    Function3<T>(T);
typedef void Function4<T>();

typedef T1   Function5<T1, T2, T3>(T2, T3);

void main() {
  Expect.equals(typeOf<Function1<dynamic>>(), typeOf<Function1>());
  Expect.equals(typeOf<Function2<dynamic>>(), typeOf<Function2>());
  Expect.equals(typeOf<Function3<dynamic>>(), typeOf<Function3>());
  Expect.equals(typeOf<Function4<dynamic>>(), typeOf<Function4>());

  Expect.equals(
      typeOf<Function5<dynamic, dynamic, dynamic>>(), typeOf<Function5>());
}