| // 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 Null check operator: If N is an expression of the form E!, then: |
| /// Let before(E) = before(N) |
| /// Let null(N) = unreachable(null(E)) |
| /// Let nonNull(N) = nonNull(E) |
| /// @description Checks reachability after Null check operator |
| /// |
| /// @author sgrekhov@unipro.ru |
| /// @issue 42021 |
| |
| // Requirements=nnbd-strong |
| import "../../../Utils/expect.dart"; |
| |
| main () { |
| late int i; |
| var s = "" as String?; |
| if (s! == null) { |
| i = 42; // `i` is not definitely unassigned because in a weak mode the |
| // condition may be true |
| } |
| try { |
| i; |
| Expect.fail("Error expected"); |
| } on Error catch(e) { |
| // Ok |
| } |
| } |
