| /* |
| * 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 In a setOrMapLiteral collection, the inferred type of an element |
| * is a set element type T, a pair of a key type K and a value type V, or both. |
| * It is computed relative to a context type P: |
| * ... |
| * If collection is unambiguously a map literal then P is Map<Pk, Pv> where Pk |
| * and Pv are determined by downwards inference, and may be ? if the downwards |
| * context does not constrain one or both. |
| * |
| * @description Checks that if collection is unambiguously a map literal then P |
| * is Map<Pk, Pv> where Pk and Pv are determined by downwards inference, and may |
| * be ? if the downwards context does not constrain one or both. |
| * @author sgrekhov@unipro.ru |
| */ |
| import "../../Utils/expect.dart"; |
| |
| class C {} |
| |
| main() { |
| Expect.isTrue({1: 1, 2: 2, 3: 3.14} is Map<int, num>); |
| Expect.isTrue({new C(): new C()} is Map<C, C>); |
| Expect.isTrue({1: 1, 2: 2, 3.14: "3.14"} is Map<num, Object>); |
| Expect.isTrue({1: 1, 2: 2, "3.14": 3.14} is Map<Object, num>); |
| } |