| /* |
| * 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 In an unmigrated library, override checking is done using legacy |
| * types. This means that an unmigrated library can bring together otherwise |
| * incompatible methods. When choosing the most specific signature during |
| * interface computation, all nullability and requiredness annotations are |
| * ignored, and the [Never] type is treated as [Null]. |
| * |
| * @description Check that if legacy class implements opted-in class, child |
| * class type parameter can be [Null] if parent class type parameter is [Never]. |
| * |
| * @Issue 40389 |
| * @author iarkh@unipro.ru |
| */ |
| // Requirements=nnbd-weak |
| // @dart=2.6 |
| |
| import "../../../../Utils/expect.dart"; |
| import "override_checking_A01_opted_in_lib.dart"; |
| |
| class A<T extends Null> implements OPTED_NEVER<T> { dynamic getParamType() => typeOf<T>(); } |
| |
| main() { |
| Expect.equals(Null, A().getParamType()); |
| Expect.equals(Null, A<Null>().getParamType()); |
| } |