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QxOrm 1.1.9
C++ Object Relational Mapping library
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00001 /**************************************************************************** 00002 ** 00003 ** http://www.qxorm.com/ 00004 ** http://sourceforge.net/projects/qxorm/ 00005 ** Original file by Lionel Marty 00006 ** 00007 ** This file is part of the QxOrm library 00008 ** 00009 ** This software is provided 'as-is', without any express or implied 00010 ** warranty. In no event will the authors be held liable for any 00011 ** damages arising from the use of this software. 00012 ** 00013 ** GNU Lesser General Public License Usage 00014 ** This file must be used under the terms of the GNU Lesser 00015 ** General Public License version 2.1 as published by the Free Software 00016 ** Foundation and appearing in the file 'license.lgpl.txt' included in the 00017 ** packaging of this file. Please review the following information to 00018 ** ensure the GNU Lesser General Public License version 2.1 requirements 00019 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 00020 ** 00021 ** If you have questions regarding the use of this file, please contact : 00022 ** contact@qxorm.com 00023 ** 00024 ****************************************************************************/ 00025 00026 #ifndef _QX_GET_BASE_CLASS_H_ 00027 #define _QX_GET_BASE_CLASS_H_ 00028 00029 #ifdef _MSC_VER 00030 #pragma once 00031 #endif 00032 00040 #include <boost/mpl/if.hpp> 00041 #include <boost/mpl/logical.hpp> 00042 #include <boost/type_traits/is_same.hpp> 00043 00044 #include <QxTraits/get_class_name.h> 00045 00046 namespace qx { 00047 namespace trait { 00048 00049 class no_base_class_defined 00050 { no_base_class_defined() { ; }; virtual ~no_base_class_defined() { ; }; virtual void dummy() = 0; }; 00051 00056 template <class T> 00057 class get_base_class 00058 { public: typedef qx::trait::no_base_class_defined type; }; 00059 00060 template <class T> 00061 class is_base_class_defined 00062 { public: enum { value = (boost::is_same<typename qx::trait::get_base_class<T>::type, qx::trait::no_base_class_defined>::value ? 0 : 1) }; }; 00063 00064 template <class T> 00065 class get_base_class_2 00066 { 00067 private: typedef typename qx::trait::get_base_class<T>::type type_base; 00068 private: enum { is_base_ok = (boost::is_same<type_base, qx::trait::no_base_class_defined>::value ? 0 : 1) }; 00069 public: typedef typename boost::mpl::if_c<is_base_ok, type_base, T>::type type; 00070 }; 00071 00072 } // namespace trait 00073 } // namespace qx 00074 00075 QX_REGISTER_CLASS_NAME(qx::trait::no_base_class_defined) 00076 00077 #define QX_REGISTER_BASE_CLASS(derivedClass, baseClass) \ 00078 namespace qx { namespace trait { \ 00079 template <> \ 00080 class get_base_class< derivedClass > \ 00081 { public: typedef baseClass type; }; \ 00082 } } // namespace qx::trait 00083 00084 #define QX_GET_BASE_CLASS(T) qx::trait::get_base_class< T >::type 00085 #define QX_GET_BASE_CLASS_WITH_TYPENAME(T) qx::trait::get_base_class< typename T >::type 00086 #define QX_IS_BASE_CLASS_DEFINED(T) qx::trait::is_base_class_defined< T >::value 00087 #define QX_IS_BASE_CLASS_DEFINED_WITH_TYPENAME(T) qx::trait::is_base_class_defined< typename T >::value 00088 #define QX_GET_BASE_CLASS_2(T) qx::trait::get_base_class_2< T >::type 00089 #define QX_GET_BASE_CLASS_2_WITH_TYPENAME(T) qx::trait::get_base_class_2< typename T >::type 00090 00091 #endif // _QX_GET_BASE_CLASS_H_