| // Copyright (c) 2021, 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 We will introduce syntax allowing you to explicitly instantiate a |
| /// function tear-off and a type literal for a generic class. The former for |
| /// consistency with constructor tear-offs, the latter to introduce in-line |
| /// types without needing a typedef, like we did for function types. And we do |
| /// both now because they share the same grammar productions. |
| /// |
| /// Example: |
| /// |
| /// T id<T>(T value) => value; |
| /// var idInt = id<int>; // Explicitly instantiated tear-off, saves on writing function types. |
| /// and |
| /// Type intList = List<int>; // In-line instantiated type literal. |
| /// |
| /// @description Checks example from the Spec. |
| /// @author iarkh@unipro.ru |
| |
| // SharedOptions=--enable-experiment=constructor-tearoffs |
| |
| import "../../Utils/expect.dart"; |
| |
| T id<T>(T value) => value; |
| var idInt = id<int>; |
| |
| main() { |
| int i = idInt(4); |
| Expect.equals(4, i); |
| |
| i = idInt(-1); |
| Expect.equals(-1, i); |
| |
| i = idInt(0); |
| Expect.equals(0, i); |
| } |