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QxOrm
1.4.2
C++ Object Relational Mapping library
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00001 /**************************************************************************** 00002 ** 00003 ** http://www.qxorm.com/ 00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com) 00005 ** 00006 ** This file is part of the QxOrm library 00007 ** 00008 ** This software is provided 'as-is', without any express or implied 00009 ** warranty. In no event will the authors be held liable for any 00010 ** damages arising from the use of this software 00011 ** 00012 ** Commercial Usage 00013 ** Licensees holding valid commercial QxOrm licenses may use this file in 00014 ** accordance with the commercial license agreement provided with the 00015 ** Software or, alternatively, in accordance with the terms contained in 00016 ** a written agreement between you and Lionel Marty 00017 ** 00018 ** GNU General Public License Usage 00019 ** Alternatively, this file may be used under the terms of the GNU 00020 ** General Public License version 3.0 as published by the Free Software 00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the 00022 ** packaging of this file. Please review the following information to 00023 ** ensure the GNU General Public License version 3.0 requirements will be 00024 ** met : http://www.gnu.org/copyleft/gpl.html 00025 ** 00026 ** If you are unsure which license is appropriate for your use, or 00027 ** if you have questions regarding the use of this file, please contact : 00028 ** contact@qxorm.com 00029 ** 00030 ****************************************************************************/ 00031 00032 #ifndef _QX_GET_BASE_CLASS_H_ 00033 #define _QX_GET_BASE_CLASS_H_ 00034 00035 #ifdef _MSC_VER 00036 #pragma once 00037 #endif 00038 00046 #include <boost/mpl/if.hpp> 00047 #include <boost/mpl/logical.hpp> 00048 #include <boost/type_traits/is_same.hpp> 00049 00050 #include <QxTraits/get_class_name.h> 00051 00052 namespace qx { 00053 namespace trait { 00054 00055 class no_base_class_defined 00056 { public: no_base_class_defined() { ; }; virtual ~no_base_class_defined() { ; }; virtual void dummy() = 0; }; 00057 00062 template <class T> 00063 class get_base_class 00064 { public: typedef qx::trait::no_base_class_defined type; }; 00065 00066 template <class T> 00067 class is_base_class_defined 00068 { public: enum { value = (boost::is_same<typename qx::trait::get_base_class<T>::type, qx::trait::no_base_class_defined>::value ? 0 : 1) }; }; 00069 00070 template <class T> 00071 class get_base_class_2 00072 { 00073 private: typedef typename qx::trait::get_base_class<T>::type type_base; 00074 private: enum { is_base_ok = (boost::is_same<type_base, qx::trait::no_base_class_defined>::value ? 0 : 1) }; 00075 public: typedef typename boost::mpl::if_c<is_base_ok, type_base, T>::type type; 00076 }; 00077 00078 } // namespace trait 00079 } // namespace qx 00080 00081 QX_REGISTER_CLASS_NAME(qx::trait::no_base_class_defined) 00082 00083 #define QX_REGISTER_BASE_CLASS(derivedClass, baseClass) \ 00084 namespace qx { namespace trait { \ 00085 template <> \ 00086 class get_base_class< derivedClass > \ 00087 { public: typedef baseClass type; }; \ 00088 } } // namespace qx::trait 00089 00090 #define QX_GET_BASE_CLASS(T) qx::trait::get_base_class< T >::type 00091 #define QX_GET_BASE_CLASS_WITH_TYPENAME(T) qx::trait::get_base_class< typename T >::type 00092 #define QX_IS_BASE_CLASS_DEFINED(T) qx::trait::is_base_class_defined< T >::value 00093 #define QX_IS_BASE_CLASS_DEFINED_WITH_TYPENAME(T) qx::trait::is_base_class_defined< typename T >::value 00094 #define QX_GET_BASE_CLASS_2(T) qx::trait::get_base_class_2< T >::type 00095 #define QX_GET_BASE_CLASS_2_WITH_TYPENAME(T) qx::trait::get_base_class_2< typename T >::type 00096 00097 #endif // _QX_GET_BASE_CLASS_H_