LanguageFeatures/nnbd/generics_A01_t05.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 Check that default function typedef type parameter is treated as
 * [Object?] dynamically.
 * @author iarkh@unipro.ru
 */
// SharedOptions=--enable-experiment=non-nullable

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

typedef G1<T> = T Function();
typedef G2<T> = void Function(T);
typedef G3<T> = void Function<T1 extends T>();
typedef G4<T1, T2, T3> = T1 Function(T2, T3);
typedef G5<T1, T2, T3, T4> = T1 Function<TT extends T2>(T3, T4);

typedef G6<T> = void Function();
typedef G7<T1, T2, T3> = void Function();

typedef G3_expected = void Function<T>();
typedef G5_expected = Object? Function<T>(Object?, Object?);

main() {
  Expect.equals(
      typeOf<G1<Object?>>(),
      typeOf<G1>()
  );

  Expect.equals(
      typeOf<G2<Object?>>(),
      typeOf<G2>()
  );

  Expect.equals(G3_expected, G3);

  Expect.equals(
      typeOf<G4<Object?, Object?, Object?>>(),
      typeOf<G4>()
  );

  Expect.equals(G5_expected, G5);

  Expect.equals(
      typeOf<G6<Object?>>(),
      typeOf<G6>()
  );

  Expect.equals(
      typeOf<G7<Object?, Object?, Object?>>(),
      typeOf<G7>()
  );
}