| /* |
| * 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 This grammar is ambiguous in cases like [{ ...a }] because |
| * [mapLiteral], [setLiteral], and [mapOrSetLiteral] all match. In cases of |
| * ambiguity like this, [mapOrSetLiteral] is always chosen. Then the |
| * disambiguation happens based on the static types, below. It is not ambiguous |
| * if the collection has any type arguments. If there is one, it's a set. If |
| * two, a map. Otherwise, it's an error. |
| * @description Checks that it is a set if collection has one type argument, it |
| * is a map if collection has two arguments and exception is thrown if there are |
| * three or more type arguments. |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=constant-update-2018 |
| |
| import "../../Utils/expect.dart"; |
| |
| main() { |
| var a; |
| Expect.isTrue(<int>{} is Set); |
| Expect.isTrue(<int, int>{} is Map); |
| } |
