| // 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 |

| /// 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 |

| /// @author sgrekhov@unipro.ru |

| import "../../Utils/expect.dart"; |

| Expect.isTrue(s1 is Set<dynamic>); |

| Expect.isFalse(s1 is Set<int>); |

| Expect.isTrue(s2 is Set<dynamic>); |

| Expect.isFalse(s2 is Set<int>); |