| // Copyright (c) 2018, 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. |
| |
| /*@testedFeatures=inference*/ |
| library test; |
| |
| class NullEquality { |
| @override |
| Null operator ==(Object other) => null; |
| } |
| |
| class SubNullEquality extends NullEquality { |
| void test() { |
| var /*@type=bool*/ super_equals_self = |
| super /*@target=NullEquality::==*/ == this; |
| var /*@type=bool*/ super_equals_null = |
| super /*@target=NullEquality::==*/ == null; |
| var /*@type=bool*/ super_not_equals_self = |
| super /*@target=NullEquality::==*/ != this; |
| var /*@type=bool*/ super_not_equals_null = |
| super /*@target=NullEquality::==*/ != null; |
| } |
| } |
| |
| test() { |
| NullEquality n = new NullEquality(); |
| var /*@type=bool*/ equals_self = n /*@target=NullEquality::==*/ == n; |
| var /*@type=bool*/ equals_null = n /*@target=NullEquality::==*/ == null; |
| var /*@type=bool*/ null_equals = null /*@target=Object::==*/ == n; |
| var /*@type=bool*/ not_equals_self = n /*@target=NullEquality::==*/ != n; |
| var /*@type=bool*/ not_equals_null = n /*@target=NullEquality::==*/ != null; |
| var /*@type=bool*/ null_not_equals = null /*@target=Object::==*/ != n; |
| } |
| |
| main() { |
| test(); |
| new SubNullEquality(). /*@target=SubNullEquality::test*/ test(); |
| } |