| // 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 An expression of the form [e as T] is accepted as a potentially |
| /// and compile-time constant expression if [e] is potentially constant or |
| /// compile-time constant, respectively, and [T] is a compile-time constant type. |
| /// A compile-time constant type means any type that doesn't contain free type |
| /// variables, so the type expression always resolves to the exact same type. |
| /// @description Checks that an expression of the form [e as T] is not accepted |
| /// and causes compile time error if [e] is not a compile-time constant and it's |
| /// assigned to the [String] variable. |
| /// @compile-error |
| /// @author iarkh@unipro.ru |
| |
| dynamic str; |
| |
| main() { |
| const String? obj = str as String?; |
| } |
