| // 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 Given a switch statement which switches over an expression e of |
| /// type T, where the cases are dispatched based on expressions e0...ek: |
| /// |
| /// - It is no longer required that the ei evaluate to instances of the same |
| /// class. |
| /// - It is an error if any of the ei evaluate to a value whose static type is |
| /// not a subtype of T. |
| /// - It is an error if any of the ei evaluate to constants for which equality |
| /// is not primitive. |
| /// - If T is an enum type, it is a warning if the switch does not handle all |
| /// enum cases, either explicitly or via a default. |
| /// - If T is Q? where Q is an enum type, it is a warning if the switch does not |
| /// handle all enum cases and null, either explicitly or via a default. |
| /// |
| /// @description Check that it is a warning if T is Q? where Q is an enum type |
| /// and the switch does not handle all enum cases and null, either explicitly or |
| /// via a default. |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-strong |
| |
| enum E { |
| one, |
| two, |
| three |
| } |
| |
| main() { |
| var e = E.three as E?; |
| switch (e) { |
| //^^^^^^^^^^ |
| // [analyzer] STATIC_WARNING.MISSING_ENUM_CONSTANT_IN_SWITCH |
| case E.one: |
| true; |
| break; |
| case E.two: |
| false; |
| break; |
| case E.three: |
| 42; |
| } |
| } |