| /* |
| * 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 To infer the type of element: |
| * ... |
| * If element is a spreadElement with expression e1: |
| * ... |
| * If P is Map<Pk, Pv> then let S be the inferred type of e1 in context P: |
| * ... |
| * If S is Null and the spread operator is ...?, then the key and value element |
| * types are Null. |
| * |
| * @description Checks that if S is Null and the spread operator is ...?, then |
| * the key and value element types are Null |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=constant-update-2018 |
| import "../../Utils/expect.dart"; |
| |
| Map<K, V> foo<K, V>(Map<K, V> s) => s; |
| |
| main() { |
| Null x = null; |
| var m = foo({...?x}); |
| Expect.isTrue(m is Map<Null, Null>); |
| } |
