QxOrm 1.4.9
C++ Object Relational Mapping library
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get_base_class.h
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1/****************************************************************************
2**
3** https://www.qxorm.com/
4** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
5**
6** This file is part of the QxOrm library
7**
8** This software is provided 'as-is', without any express or implied
9** warranty. In no event will the authors be held liable for any
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15** Software or, alternatively, in accordance with the terms contained in
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18** GNU General Public License Usage
19** Alternatively, this file may be used under the terms of the GNU
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31
32#ifndef _QX_GET_BASE_CLASS_H_
33#define _QX_GET_BASE_CLASS_H_
34
35#ifdef _MSC_VER
36#pragma once
37#endif
38
47
48namespace qx {
49namespace trait {
50
52{ public: no_base_class_defined() { ; }; virtual ~no_base_class_defined() { ; }; virtual void dummy() = 0; };
53
58template <class T>
61
62template <class T>
64{ public: enum { value = (std::is_same<typename qx::trait::get_base_class<T>::type, qx::trait::no_base_class_defined>::value ? 0 : 1) }; };
65
66template <class T>
68{
70private: enum { is_base_ok = (std::is_same<type_base, qx::trait::no_base_class_defined>::value ? 0 : 1) };
71public: typedef typename std::conditional<is_base_ok, type_base, T>::type type;
72};
73
74} // namespace trait
75} // namespace qx
76
78
79#define QX_REGISTER_BASE_CLASS(derivedClass, baseClass) \
80namespace qx { namespace trait { \
81template <> \
82class get_base_class< derivedClass > \
83{ public: typedef baseClass type; }; \
84} } // namespace qx::trait
85
86#define QX_GET_BASE_CLASS(T) qx::trait::get_base_class< T >::type
87#define QX_GET_BASE_CLASS_WITH_TYPENAME(T) qx::trait::get_base_class< typename T >::type
88#define QX_IS_BASE_CLASS_DEFINED(T) qx::trait::is_base_class_defined< T >::value
89#define QX_IS_BASE_CLASS_DEFINED_WITH_TYPENAME(T) qx::trait::is_base_class_defined< typename T >::value
90#define QX_GET_BASE_CLASS_2(T) qx::trait::get_base_class_2< T >::type
91#define QX_GET_BASE_CLASS_2_WITH_TYPENAME(T) qx::trait::get_base_class_2< typename T >::type
92
93#endif // _QX_GET_BASE_CLASS_H_
std::conditional< is_base_ok, type_base, T >::type type
qx::trait::get_base_class< T >::type type_base
qx::trait::get_base_class<T>::type : retrieve base class of type T registered into QxOrm context and ...
qx::trait::no_base_class_defined type
qx::trait::get_class_name<T>::get() : return class name of type T under const char * format,...
#define QX_REGISTER_CLASS_NAME(className)
Root namespace for all QxOrm library features.