| // 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 A generic class declaration introduces a generic class into the |
| /// enclosing library scope. A generic class is a mapping that accepts a list of |
| /// actual type arguments and maps them to a class. Consider a generic class |
| /// declaration [G] named [C] with formal type parameter declarations [X1 extends |
| /// B1,..., Xm extends Bm], and a parameterized type [T] of the form |
| /// [C<T1,..., Tl>]. |
| /// Otherwise, said parameterized type [C<T1,..., Tm>] denotes an application of |
| /// the generic class declared by [G] to the type arguments [T1],...,[Tm]. This |
| /// yields a class [C0] whose members are equivalent to those of a class |
| /// declaration which is obtained from the declaration [G] by replacing each |
| /// occurrence of [Xj] by [Tj]. |
| /// @description Checks that each occurrence of [Xj] is replaced by [Tj] for |
| /// generic class [C0] with several parameters. |
| /// @author iarkh@unipro.ru |
| |
| |
| import "dart:async"; |
| import "../../Utils/expect.dart"; |
| |
| class A<X extends A<X>> {} |
| |
| class C<T1, T2, T3> { |
| check(exp1, exp2, exp3) { |
| Expect.equals(exp1, T1); |
| Expect.equals(exp2, T2); |
| Expect.equals(exp3, T3); |
| } |
| } |
| |
| main() { |
| (new C<int, int, int>()).check(int, int, int); |
| (new C<List, dynamic, String>()).check(List, dynamic, String); |
| (new C<String, Null, Null>()).check(String, Null, Null); |
| (new C<C, C, C>()).check(C, C, C); |
| (new C<A, C, C>()).check(A, C, C); |
| (new C<dynamic, dynamic, dynamic>()).check(dynamic, dynamic, dynamic); |
| (new C<Null, Null, Null>()).check(Null, Null, Null); |
| (new C<Object, List, FutureOr>()).check(Object, List, dynamic); |
| (new C<FutureOr, dynamic, dynamic>()).check(dynamic, dynamic, dynamic); |
| } |
| |