| // 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 From the Unified collections Spec: |
| /// We require that at least one component unambiguously determine the literal |
| /// form, otherwise it is a compile-time error. So, given: |
| /// dynamic x = <int, int>{}; |
| /// Iterable l = []; |
| /// Map m = {}; |
| /// Then: |
| /// {...x} // Static error, because it is ambiguous. |
| /// {...x, ...l} // Statically a set, runtime error when spreading x. |
| /// {...x, ...m} // Statically a map, no runtime error. |
| /// {...l, ...m} // Static error, because it must be both a set and a map. |
| /// @description Checks some dynamic cases of the type inference |
| /// @author iarkh@unipro.ru |
| |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| dynamic set1 = <int>{}; |
| dynamic set2 = <int>{}; |
| dynamic map1 = <int, int>{}; |
| dynamic map2 = <int, int>{}; |
| |
| Map res; |
| Expect.throws(() => res = {...map1, ...set1}); |
| Expect.throws(() => res = {...set1, ...map1}); |
| Expect.throws(() => res = {...set1, ...set2}); |
| |
| Map res1 = {...map1, ...map2}; |
| } |