| // 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 that if one of the spreadable element is [Map], result |
| * is statically [Map] |
| * @author iarkh@unipro.ru |
| */ |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| dynamic map = <int, int>{}; |
| dynamic set = <int>{}; |
| Map m = {}; |
| |
| Map res; |
| Expect.throws(() => res = {...m, ...set}); |
| Expect.throws(() => res = {...set, ...m}); |
| |
| Expect.isTrue({...map, ...m} is Map); |
| Expect.isTrue({...m, ...map} is Map); |
| } |