// 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 An expression like:
///   { ...a, ...b }
/// Is syntactically parsed as [mapOrSetLiteral]. To determine whether it
/// actually is a map or set, the surrounding context is used. Given an
/// [mapOrSetLiteral] with context type [C]:
///
/// If [Set<Null>] is assignable to [C], and [Map<Null, Null>] is not
/// assignable to [C], then the collection is a set literal.
///
/// Otherwise, it is a map literal.
///
/// In other words, if it can only be a set, it is. Otherwise, it's a map.
/// @description Checks that if [a] is a set literal and [b] is a map literal,
/// it's a compile error.
/// @author iarkh@unipro.ru

main() {
  List list =  [1, 12, 24];
  Map map = {1: 1, "test": 1, 14: null};

  var res = {...list, ...map};
//          ^^^^^^^^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}