LanguageFeatures/Spread-collections/ConstSpreads_A09_t09.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 cannot be non-constant,
 * cannot be [null] and cannot be of the type which is not [List] or [Set]
 * @author iarkh@unipro.ru
 */

List l = [];
Set s = {11};

const m1 = {1: 1};
Map m2 = {2: 2};

const int i1 = 25;
int i2 = 25;

const n = null;

main() {
  const Set res1  = const {...l};
// [error line 29, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  const Set res2  = const {...s};
// [error line 33, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  const Set res3  = const {...m1};
// [error line 37, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  const Set res4  = const {...m2};
// [error line 41, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  const Set res5  = const {...i1};
// [error line 45, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  const Set res6  = const {...i2};
// [error line 49, column 0]
// [analyzer] unspecified
// [cfe] unspecified
  const Set res7  = const {...n};
  //                ^
  // [cfe] Constant evaluation error:
  //                          ^
  // [analyzer] COMPILE_TIME_ERROR.CONST_SPREAD_EXPECTED_LIST_OR_SET
}