| // 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 [null] or 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 potentially constant |
| * expression. |
| * @description: Checks that constant set spread [...?] element can be constant |
| * list or set or [null]. |
| * @static-warning |
| * @author iarkh@unipro.ru |
| */ |
| |
| const Set? empty = {}; |
| |
| main() { |
| const Set res1 = const {...?[1, 2, 3], 4}; |
| const Set res2 = const {...?([1, 2, 3] as List?), 4}; |
| const Set res3 = const {5, ...?{2, 11}}; |
| const Set res4 = const {5, ...?({2, 11} as Set?)}; |
| const Set res5 = const {...?{}}; |
| const Set res7 = const {...?null}; |
| const Set res8 = const {...?empty}; |
| } |
