| // 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 If e1 translates to F then e1?[e2] = e3 translates to: |
| /// SHORT[EXP(e1), fn[x] => x[EXP(e2)] = EXP(e3)] |
| /// |
| /// @description Check that if e1 translates to F then e1?[e2] = e3 translates |
| /// to: SHORT[EXP(e1), fn[x] => x[EXP(e2)] = EXP(e3)]. Test type aliases |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-strong |
| import '../../Utils/expect.dart'; |
| |
| class C { |
| List _list; |
| void operator[]=(int index, dynamic value) => _list[index] = value; |
| |
| C(int length) : _list = new List.filled(length, null); |
| } |
| |
| typedef CAlias1 = C?; |
| typedef CAlias2 = C; |
| |
| void testShort(C? x, int index, dynamic value) { |
| var actual = x?[index] = value; |
| var n0 = x; |
| var expected = n0 == null ? null : n0[index] = value; |
| Expect.equals(expected, actual); |
| } |
| |
| |
| main() { |
| CAlias1 c1 = null; |
| testShort(c1, 42, "Lily was here"); |
| c1 = new C(3); |
| testShort(c1, 2, "Show must go on"); |
| |
| CAlias1? c2 = null; |
| testShort(c2, 42, "Lily was here"); |
| c2 = new C(3); |
| testShort(c2, 2, "Show must go on"); |
| |
| CAlias2? c3 = null; |
| testShort(c3, 42, "Lily was here"); |
| c3 = new C(3); |
| testShort(c3, 2, "Show must go on"); |
| |
| CAlias2 c4 = new C(3); |
| testShort(c4, 2, "Show must go on"); |
| } |