| // 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 An expression like: |
| /// { ...a, ...b } |
| /// Is syntactically parsed as [mapOrSetLiteral]. To determine whether it |
| /// actually is a map or set, the surrounding context is used. Given an |
| /// [mapOrSetLiteral] with context type [C]: |
| /// |
| /// If [Set<Null>] is assignable to [C], and [Map<Null, Null>] is not |
| /// assignable to [C], then the collection is a set literal. |
| /// |
| /// Otherwise, it is a map literal. |
| /// |
| /// In other words, if it can only be a set, it is. Otherwise, it's a map. |
| /// @description Checks that if [a] is a set literal and [b] is a map literal, |
| /// it's a compile error. |
| /// @author iarkh@unipro.ru |
| |
| main() { |
| List list = [1, 12, 24]; |
| Map map = {1: 1, "test": 1, 14: null}; |
| |
| var res = {...list, ...map}; |
| // ^^^^^^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
