| // 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. |
| |
| /// @assertion We say that a type T0 is a subtype of a type T1 (written T0 <: T1) |
| /// when: |
| /// Left Null: if T0 is Null then: |
| /// - if T1 is a type variable (promoted or not) the query is false |
| /// - If T1 is FutureOr<S> for some S, then the query is true iff Null <: S. |
| /// - If T1 is Null, S? or S* for some S, then the query is true. |
| /// - Otherwise, the query is false |
| /// @description Check that if type T0 is Null and If T1 is Null? then T0 is |
| /// subtype of T1 |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// @description Check that if type T0 is a subtype of a type T1, then instance |
| /// of T0 can be assigned to the mixin member of type T1 |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// This test is generated from left_null_A04.dart and |
| /// class_member_x03.dart. |
| /// Don't modify it. If you want to change this test, change one of the files |
| /// above and then run generator.dart to regenerate the tests. |
| |
| |
| |
| |
| Null t0Instance = null; |
| Null? t1Instance = null; |
| |
| const t1Default = null; |
| |
| |
| |
| |
| class ClassMemberMixin1_t03 { |
| Null? m = t1Default; |
| |
| void set superSetter(dynamic val) {} |
| } |
| |
| class ClassMember1_t03 extends Object with ClassMemberMixin1_t03 { |
| test() { |
| m = t0Instance; |
| superSetter = t0Instance; |
| } |
| } |
| |
| main() { |
| ClassMember1_t03 c1 = new ClassMember1_t03(); |
| c1.m = t0Instance; |
| c1.test(); |
| c1.superSetter = t0Instance; |
| } |