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2026-04-03 11:32:07 +08:00
commit 003be19522
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--- a/include/QxTraits/get_base_class.h
+++ b/include/QxTraits/get_base_class.h
@@ -0,0 +1,124 @@
+/****************************************************************************
+**
+** https://www.qxorm.com/
+** Copyright (C) 2013 XDL Team (ic-east.com)
+**
+** This file is part of the QxOrm library
+**
+** This software is provided 'as-is', without any express or implied
+** warranty. In no event will the authors be held liable for any
+** damages arising from the use of this software
+**
+** Commercial Usage
+** Licensees holding valid commercial QxOrm licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and XDL Team
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file 'license.gpl3.txt' included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met : http://www.gnu.org/copyleft/gpl.html
+**
+** If you are unsure which license is appropriate for your use, or
+** if you have questions regarding the use of this file, please contact :
+** ic-east.com
+**
+****************************************************************************/
+
+#ifndef _QX_GET_BASE_CLASS_H_
+#define _QX_GET_BASE_CLASS_H_
+
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+/*!
+ * \file get_base_class.h
+ * \author XDL Team
+ * \ingroup QxTraits
+ * \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
+ */
+
+#include <QxTraits/get_class_name.h>
+
+namespace qx
+{
+    namespace trait
+    {
+
+        class no_base_class_defined
+        {
+        public:
+            no_base_class_defined() { ; };
+            virtual ~no_base_class_defined() { ; };
+            virtual void dummy() = 0;
+        };
+
+        /*!
+         * \ingroup QxTraits
+         * \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
+         */
+        template <class T>
+        class get_base_class
+        {
+        public:
+            typedef qx::trait::no_base_class_defined type;
+        };
+
+        template <class T>
+        class is_base_class_defined
+        {
+        public:
+            enum
+            {
+                value = (std::is_same<typename qx::trait::get_base_class<T>::type, qx::trait::no_base_class_defined>::value ? 0 : 1)
+            };
+        };
+
+        template <class T>
+        class get_base_class_2
+        {
+        private:
+            typedef typename qx::trait::get_base_class<T>::type type_base;
+
+        private:
+            enum
+            {
+                is_base_ok = (std::is_same<type_base, qx::trait::no_base_class_defined>::value ? 0 : 1)
+            };
+
+        public:
+            typedef typename std::conditional<is_base_ok, type_base, T>::type type;
+        };
+
+    } // namespace trait
+} // namespace qx
+
+QX_REGISTER_CLASS_NAME(qx::trait::no_base_class_defined)
+
+#define QX_REGISTER_BASE_CLASS(derivedClass, baseClass) \
+    namespace qx                                        \
+    {                                                   \
+        namespace trait                                 \
+        {                                               \
+            template <>                                 \
+            class get_base_class<derivedClass>          \
+            {                                           \
+            public:                                     \
+                typedef baseClass type;                 \
+            };                                          \
+        }                                               \
+    } // namespace qx::trait
+
+#define QX_GET_BASE_CLASS(T) qx::trait::get_base_class<T>::type
+#define QX_GET_BASE_CLASS_WITH_TYPENAME(T) qx::trait::get_base_class<typename T>::type
+#define QX_IS_BASE_CLASS_DEFINED(T) qx::trait::is_base_class_defined<T>::value
+#define QX_IS_BASE_CLASS_DEFINED_WITH_TYPENAME(T) qx::trait::is_base_class_defined<typename T>::value
+#define QX_GET_BASE_CLASS_2(T) qx::trait::get_base_class_2<T>::type
+#define QX_GET_BASE_CLASS_2_WITH_TYPENAME(T) qx::trait::get_base_class_2<typename T>::type
+
+#endif // _QX_GET_BASE_CLASS_H_