| // 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 The requirement that the condition in a boolean conditional |
| /// control expression (e.g. the a conditional statement, conditional element, |
| /// while loop, etc) be assignable to bool is unchanged from pre null-safe Dart. |
| /// The change in assignability means that the static type of the condition may |
| /// only be dynamic, Never, or bool |
| /// |
| /// @description Checks that the static type of the condition (in assignability) |
| /// may be dynamic, Never, or bool |
| /// |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-weak |
| import "../../../Utils/expect.dart"; |
| |
| Never foo() { |
| throw "Never"; |
| } |
| |
| dynamic bar(x) => x; |
| |
| main() { |
| bool b = true; |
| bool x = false; |
| x = b; |
| x = bar(true); |
| Expect.throws(() { |
| x = bar("Lily was here"); |
| }); |
| Expect.throws(() { |
| x = foo(); |
| }); |
| } |