| // 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]. |
| * @compile-error |
| * @author iarkh@unipro.ru |
| */ |
| |
| main() { |
| const List res = const [...?({1: 2, 3: 4} as Map?)]; |
| } |
