| // 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 set, and at least one element must be a set, then |
| /// collection is a set literal with static type Set<T> where T is the least |
| /// upper bound of the set element types of the elements. |
| /// |
| /// @description Checks that if all elements can be a set, and at least one |
| /// element must be a set, then collection is a set literal with static type |
| /// Set<T> where T is the least upper bound of the set element types of the |
| /// elements |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| dynamic d1 = 1; |
| dynamic d2 = 2; |
| var s = {d1, d2, 3}; |
| Expect.isTrue(s is Set<dynamic>); |
| Expect.isFalse(s is Set<int>); |
| Expect.runtimeIsType<Set<dynamic>>(s); |
| Expect.runtimeIsNotType<Set<int>>(s); |
| } |