| // Copyright (c) 2020, 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 The definitions of least and greatest closure are changed in null |
| * safe libraries to substitute [Never] in positions where previously [Null |
| * would have been substituted, and [Object?] in positions where previously |
| * [Object] or [dynamic] would have been substituted. |
| * @description Check that correct type is substituted for [void |
| * Function({required bool x})] typedef. |
| * @note Read more about the least and greatest closure test template: |
| * https://github.com/dart-lang/co19/issues/575#issuecomment-613542349 |
| * |
| * @author iarkh@unipro.ru |
| */ |
| // Requirements=nnbd-strong |
| |
| import "../../../../Utils/expect.dart"; |
| |
| typedef check = void Function({required bool x}); |
| |
| void main() { |
| void f(check Function() g) => g(); |
| Expect.throws(() { f(() => captureTypeArgument()); }); |
| Expect.equals(typeOf<check>(), capturedTypeArgument); |
| } |