| // 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 If a class [C] in an opted-in library implements the same generic |
| /// class [I] more than once as [I0], .., [In], and at least one of the [Ii] is |
| /// not syntactically equal to the others, then it is an error if |
| /// [NNBD_TOP_MERGE(S0, ..., Sn)] is not defined where [Si] is [NORM(Ii)]. |
| /// Otherwise, for the purposes of runtime subtyping checks, [C] is considered to |
| /// implement the canonical interface given by [NNBD_TOP_MERGE(S0, ..., Sn)]. |
| /// |
| /// @description Check that result of [NNBD_TOP_MERGE] for the cases: |
| /// NNBD_TOP_MERGE(dynamic*, dynamic*) = dynamic |
| /// NNBD_TOP_MERGE(void*, void*) = void |
| /// NNBD_TOP_MERGE(Null*, Null*) = Null |
| /// |
| /// @author iarkh@unipro.ru |
| |
| // Requirements=nnbd-weak |
| |
| import "../../../../Utils/expect.dart"; |
| import "override_checking_A06_opted_out_lib.dart"; |
| |
| class in_dynamic extends out_dynamic implements out_dynamic1 {} |
| class in_void extends out_void implements out_void1 {} |
| class in_Null extends out_Null implements out_Null1 {} |
| |
| main() { |
| Expect.isTrue(in_dynamic().f is dynamic Function(dynamic)); |
| Expect.isTrue(in_void().f is void Function(void)); |
| Expect.isTrue(in_Null().f is Null Function(Null)); |
| Expect.runtimeIsType<dynamic Function(dynamic)>(in_dynamic().f); |
| Expect.runtimeIsType<void Function(void)>(in_void().f); |
| Expect.runtimeIsType<Null Function(Null)>(in_Null().f); |
| } |