| /* |
| * 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. |
| */ |
| /* |
| * 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 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, legacy |
| * setter can accept null values if corresponding parent setter is of both |
| * nullable or non-nullable type. |
| * |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // @dart=2.4 |
| |
| import "../../Utils/expect.dart"; |
| import "override_checking_opted_in_lib.dart"; |
| |
| class A1 implements A { |
| void set set_field1(String str) { |
| Expect.isNull(str); |
| } |
| |
| void set set_field2(String str) { |
| Expect.isNull(str); |
| } |
| String field1 = "a"; |
| String field2 = "b"; |
| String get get_field1 => field1; |
| String get get_field2 => field2; |
| |
| void test_nullable(int i) => 4; |
| void test_required({int i = 1}) => 1; |
| void test_never(Null i) => 1; |
| int test_return_nullable() => 1; |
| Null test_return_never() => null; |
| } |
| |
| main() { |
| A1 a1 = A1(); |
| a1.set_field1 = null; |
| a1.set_field2 = null; |
| } |