// 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


main() {
  Map? aMap = {1: 1, 2: 2, 3: 3};
  var res = <int>{...?aMap};
//                ^^^^
// [analyzer] unspecified
// [cfe] unspecified
}