| /* |
| * Copyright 2014 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef NB_POLYMORPHIC_DOWNCAST_H_ |
| #define NB_POLYMORPHIC_DOWNCAST_H_ |
| |
| #include "starboard/common/log.h" |
| |
| namespace nb { |
| |
| // This function is designed to model the behavior of polymorphic_downcast from |
| // http://www.boost.org/doc/libs/1_56_0/libs/conversion/cast.htm |
| |
| template <typename Derived, typename Base> |
| Derived polymorphic_downcast(Base base) { |
| #if defined(COBALT_BUILD_TYPE_DEBUG) || defined(COBALT_BUILD_TYPE_DEVEL) |
| SB_DCHECK(dynamic_cast<Derived>(base) == base); |
| #endif |
| return static_cast<Derived>(base); |
| } |
| |
| } // namespace nb |
| |
| #endif // NB_POLYMORPHIC_DOWNCAST_H_ |
