modules_mobile/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 #ifndef DPL_BOOL_OPERATOR_H
  23 #define DPL_BOOL_OPERATOR_H
  24
  25 #define DPL_IMPLEMENT_BOOL_OPERATOR(Type, ThisType, CheckPtr, ClassPtr) \
  26     typedef Type *ThisType::*UnknownBoolType;                           \
  27                                                                         \
  28     operator UnknownBoolType() const                                    \
  29     {                                                                   \
  30         return (CheckPtr == NULL) ? NULL : &ThisType::ClassPtr;         \
  31     }                                                                   \
  32                                                                         \
  33     bool operator !() const                                             \
  34     {                                                                   \
  35         return CheckPtr == NULL;                                        \
  36     }
  37
  38 #endif // DPL_BOOL_OPERATOR_H