| // 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 The upwards inference key type of an if-else map element is the |
| /// least upper bound of the key types of the "then" and "else" elements, |
| /// likewise for the value type. |
| /// |
| /// @description Checks that the upwards inference key type of an if-else map |
| /// element is the least upper bound of the key types of the "then" and "else" |
| /// elements, likewise for the value type. |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../Utils/expect.dart"; |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| main() { |
| var i = 1; |
| var map1 = { |
| new C(): new C(), |
| if (i > 0) new B(): new B() else new B(): new A() |
| }; |
| Expect.isTrue(map1 is Map<B, A>); |
| Expect.runtimeIsType<Map<B, A>>(map1); |
| |
| var map2 = { |
| "": "", |
| if (i < 0) "": "" else "": 1, |
| }; |
| Expect.isTrue(map2 is Map<String, Object>); |
| Expect.runtimeIsType<Map<String, Object>>(map2); |
| |
| var map3 = { |
| 1: 1, |
| if (i > 0) 3:3 else 3.14: 3, |
| if (i < 0) 2: 2 |
| }; |
| Expect.isTrue(map3 is Map<num, int>); |
| Expect.runtimeIsType<Map<num, int>>(map3); |
| } |