| // 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] translates to: |
| /// PASSTHRU[F, fn[x] => x[EXP(e2)]] |
| /// |
| /// @description If e1 translates to F then e1[e2] translates to: |
| /// PASSTHRU[F, fn[x] => x[EXP(e2)]] |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| class C { |
| int operator[](int index) => index; |
| } |
| |
| main() { |
| C c1 = new C(); |
| Expect.equals(42, c1[42]); |
| |
| C? c2 = new C(); |
| if (c2 != null) { |
| Expect.equals(42, c2[42]); |
| } |
| } |
