125 lines
4.4 KiB
C++
125 lines
4.4 KiB
C++
/****************************************************************************
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**
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** https://www.qxorm.com/
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** Copyright (C) 2013 XDL Team (ic-east.com)
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**
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** This file is part of the QxOrm library
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any
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** damages arising from the use of this software
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**
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** Commercial Usage
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** Licensees holding valid commercial QxOrm licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and XDL Team
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file 'license.gpl3.txt' included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met : http://www.gnu.org/copyleft/gpl.html
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**
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** If you are unsure which license is appropriate for your use, or
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** if you have questions regarding the use of this file, please contact :
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** ic-east.com
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**
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****************************************************************************/
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#ifndef _QX_GET_BASE_CLASS_H_
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#define _QX_GET_BASE_CLASS_H_
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#ifdef _MSC_VER
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#pragma once
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#endif
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/*!
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* \file get_base_class.h
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* \author XDL Team
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* \ingroup QxTraits
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* \brief qx::trait::get_base_class<T>::type : retrieve base class of type T registered into QxOrm context and return qx::trait::no_base_class_defined if no base class defined
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*/
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#include <QxTraits/get_class_name.h>
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namespace qx
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{
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namespace trait
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{
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class no_base_class_defined
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{
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public:
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no_base_class_defined() { ; };
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virtual ~no_base_class_defined() { ; };
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virtual void dummy() = 0;
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};
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/*!
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* \ingroup QxTraits
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* \brief qx::trait::get_base_class<T>::type : retrieve base class of type T registered into QxOrm context and return qx::trait::no_base_class_defined if no base class defined
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*/
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template <class T>
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class get_base_class
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{
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public:
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typedef qx::trait::no_base_class_defined type;
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};
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template <class T>
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class is_base_class_defined
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{
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public:
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enum
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{
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value = (std::is_same<typename qx::trait::get_base_class<T>::type, qx::trait::no_base_class_defined>::value ? 0 : 1)
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};
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};
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template <class T>
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class get_base_class_2
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{
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private:
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typedef typename qx::trait::get_base_class<T>::type type_base;
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private:
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enum
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{
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is_base_ok = (std::is_same<type_base, qx::trait::no_base_class_defined>::value ? 0 : 1)
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};
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public:
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typedef typename std::conditional<is_base_ok, type_base, T>::type type;
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};
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} // namespace trait
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} // namespace qx
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QX_REGISTER_CLASS_NAME(qx::trait::no_base_class_defined)
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#define QX_REGISTER_BASE_CLASS(derivedClass, baseClass) \
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namespace qx \
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{ \
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namespace trait \
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{ \
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template <> \
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class get_base_class<derivedClass> \
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{ \
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public: \
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typedef baseClass type; \
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}; \
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} \
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} // namespace qx::trait
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#define QX_GET_BASE_CLASS(T) qx::trait::get_base_class<T>::type
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#define QX_GET_BASE_CLASS_WITH_TYPENAME(T) qx::trait::get_base_class<typename T>::type
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#define QX_IS_BASE_CLASS_DEFINED(T) qx::trait::is_base_class_defined<T>::value
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#define QX_IS_BASE_CLASS_DEFINED_WITH_TYPENAME(T) qx::trait::is_base_class_defined<typename T>::value
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#define QX_GET_BASE_CLASS_2(T) qx::trait::get_base_class_2<T>::type
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#define QX_GET_BASE_CLASS_2_WITH_TYPENAME(T) qx::trait::get_base_class_2<typename T>::type
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#endif // _QX_GET_BASE_CLASS_H_
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