| // 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 list [...?] spread element can be constant |
| /// list or set or [null]. |
| /// @author iarkh@unipro.ru |
| |
| |
| main() { |
| const List res1 = const [...?([1, 2, 3] as List?), 4]; |
| const List res2 = const [5, ...?({2, 11} as Set?)]; |
| const List res3 = const [...?null]; |
| } |
