LanguageFeatures/Spread-collections/ConstSpreads_A09_t13.dart

// 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 From the Unified collection Spec:
/// A spreadElement starting with [...] is a constant element if its expression
/// is constant and it evaluates to a constant List, Set or Map instance
/// originally created by a list, set or map literal. It is a potentially
/// constant element if the expression is a potentially constant expression.
/// @description: Checks that constant set spread element can be constant list
/// or set.
/// @author iarkh@unipro.ru


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

Set emptyset = {};

main() {
  const Set res1 = const {...[1, 2, 3], 4};
  Expect.setEquals({1, 2, 3, 4}, res1);

  const Set res2 = const {5, ...{2, 11}};
  Expect.setEquals({5, 2, 11}, res2);

  const Set res3 = const {...{}};
  Expect.setEquals(emptyset, res3);
}