| // 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 [Object?] type is substituted for [typedef X<X> = |
| * FutureOr<X>]. |
| * @note Read more about the least and greatest closure test template: |
| * https://github.com/dart-lang/co19/issues/575#issuecomment-613542349 |
| * |
| * @Issue 44070 |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| import "../../../../Utils/expect.dart"; |
| import "dart:async"; |
| |
| typedef C<X> = FutureOr<X>; |
| |
| void main() { |
| void f<X>(C<X> Function() g) => g(); |
| |
| // Verify that `x` does not have type `dynamic` (but, expecting the type |
| // to be `Object?` we need the null aware access `?.`). |
| f(() => captureTypeArgument()..unknownMember); |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| f(() => captureTypeArgument()?..unknownMember); |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| f(() => captureTypeArgument()..toString()); |
| |
| f(() => captureTypeArgument()?..toString()); |
| |
| } |
