| // 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 Finally, we define inference on a setOrMapLiteral collection as |
| /// follows: |
| /// ... |
| /// Otherwise, collection is still ambiguous, the downwards context for the |
| /// elements of collection is ?, and the disambiguation is done using the |
| /// immediate elements of collection as follows: |
| /// ... |
| /// If all elements can be a map, and at least one element must be a map, then e |
| /// is a map literal with static type Map<K, V> where K is the least upper bound |
| /// of the key types of the elements and V is the least upper bound of the value |
| /// types. |
| /// |
| /// @description Checks that if all elements can be a map, and at least one |
| /// element must be a map, then e is a map literal with static type Map<K, V> |
| /// where K is the least upper bound of the key types of the elements and V is |
| /// the least upper bound of the value types. |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| dynamic d1 = 1; |
| dynamic d2 = 2; |
| var m = {d1: d2, 3: 4}; |
| Expect.isTrue(m is Map<dynamic, dynamic>); |
| Expect.isFalse(m is Map<int, int>); |
| Expect.runtimeIsType<Map<dynamic, dynamic>>(m); |
| Expect.runtimeIsNotType<Map<int, int>>(m); |
| } |