modules/core/include/dpl/bool_operator.h

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *    Licensed under the Apache License, Version 2.0 (the "License");
   5  *    you may not use this file except in compliance with the License.
   6  *    You may obtain a copy of the License at
   7  *
   8  *        http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *    Unless required by applicable law or agreed to in writing, software
  11  *    distributed under the License is distributed on an "AS IS" BASIS,
  12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *    See the License for the specific language governing permissions and
  14  *    limitations under the License.
  15  */
  16 /*
  17  * @file        bool_operator.h
  18  * @author      Przemyslaw Dobrowolski (p.dobrowolsk@samsung.com)
  19  * @version     1.0
  20  * @brief       This file is the implementation file of bool operator
  21  *
  22  * This module is deprecated, please use standard C++11 feature: explicit conversion operator
  23  *
  24  * example:
  25  *  explicit operator bool() {};
  26  */
  27 #ifndef DPL_BOOL_OPERATOR_H
  28 #define DPL_BOOL_OPERATOR_H
  29
  30 #include <dpl/availability.h>
  31
  32 #define DPL_IMPLEMENT_BOOL_OPERATOR(Type, ThisType, CheckPtr, ClassPtr)                        \
  33     typedef Type *ThisType::*UnknownBoolType;                                                  \
  34                                                                                                \
  35     operator UnknownBoolType() const                                                           \
  36     {                                                                                          \
  37         return (CheckPtr == NULL) ? NULL : &ThisType::ClassPtr;                                \
  38     } DPL_DEPRECATED_WITH_MESSAGE("use standard C++11 feature: explicit conversion operator"); \
  39                                                                                                \
  40     bool operator !() const                                                                    \
  41     {                                                                                          \
  42         return CheckPtr == NULL;                                                               \
  43     } DPL_DEPRECATED_WITH_MESSAGE("use standard C++11 feature: explicit conversion operator"); \
  44
  45 #endif // DPL_BOOL_OPERATOR_H