| // Copyright (c) 2014, 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. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| class A { |
| const factory A() = B; |
| } |
| |
| class B implements A { |
| const B(); |
| |
| operator ==(o) => true; |
| } |
| |
| confuse(x) { |
| if (DateTime.now().millisecondsSinceEpoch == 42) return confuse(2); |
| return x; |
| } |
| |
| main() { |
| // It is a compile-time error if the key type overrides operator ==. |
| dynamic m = const {const A(): 42}; |
| // ^ |
| // [cfe] Constant evaluation error: |
| // ^^^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS |
| Expect.equals(42, m[confuse(const B())]); |
| |
| m = const {"foo": 99, const A(): 499}; |
| // ^ |
| // [cfe] Constant evaluation error: |
| // ^^^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS |
| Expect.equals(499, m[confuse(const B())]); |
| } |