| // 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 (Unified collections) Let [e] be a [setOrMapLiteral]. |
| /// |
| /// If [e] has a context [C], and the base type of [C] is [Cbase] (that is, |
| /// [Cbase] is [C] with all wrapping [FutureOrs] removed), and [Cbase] is not |
| /// [?], then let [S] be the greatest closure. |
| /// |
| /// If [e] has [typeArguments] then: |
| /// |
| /// If there is exactly one type argument [T], then [e] is a set literal with |
| /// static type [Set<T>]. |
| /// |
| /// @description Checks that [setOrMapLiteral] has one type argument, it's a set. |
| /// @author iarkh@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| var aSet = {1, 2, 3} as Set?; |
| var aList = [1, 2, 3] as List?; |
| |
| var res1 = <int>{...?aSet}; |
| Expect.isTrue(res1 is Set); |
| Expect.runtimeIsType<Set>(res1); |
| |
| var res2 = <Object>{...?aList}; |
| Expect.isTrue(res2 is Set); |
| Expect.runtimeIsType<Set>(res2); |
| } |