| // 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 map element without an |
| /// else is the key type of the "then" element, likewise for the value type |
| /// |
| /// @description Checks that the upwards inference key type of an if map element |
| /// without an else is the key type of the "then" element, 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 = { |
| if (i > 0) "": i, |
| }; |
| Expect.isTrue(map1 is Map<String, int>); |
| Expect.runtimeIsType<Map<String, int>>(map1); |
| |
| var map2 = { |
| "": "", |
| if (i < 0) "": 1, |
| }; |
| Expect.isTrue(map2 is Map<String, Object>); |
| Expect.runtimeIsType<Map<String, Object>>(map2); |
| |
| var map3 = { |
| new C(): new C(), |
| if (i > 0) new B(): new B(), |
| if (i < 0) new B(): new A() |
| }; |
| Expect.isTrue(map3 is Map<B, A>); |
| Expect.runtimeIsType<Map<B, A>>(map3); |
| } |