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83 lines
2.5 KiB
83 lines
2.5 KiB
3 days ago
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/****************************************************************************
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**
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** https://www.qxorm.com/
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** Copyright (C) 2013 Lionel Marty (contact@qxorm.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 Lionel Marty
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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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** contact@qxorm.com
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**
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****************************************************************************/
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#ifndef _QX_QT_META_OBJECT_H_
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#define _QX_QT_META_OBJECT_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 qt_meta_object.h
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* \author Lionel Marty
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* \ingroup QxTraits
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* \brief qx::trait::qt_meta_object<T>::get() : if T is based on QObject class, then return QMetaObject instance of Qt introspection engine, else return NULL
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*/
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#include <QtCore/qmetaobject.h>
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#include <QtCore/qmetatype.h>
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namespace qx {
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namespace trait {
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/*!
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* \ingroup QxTraits
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* \brief qx::trait::qt_meta_object<T>::get() : if T is based on QObject class, then return QMetaObject instance of Qt introspection engine, else return NULL
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*/
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template <typename T>
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class qt_meta_object
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{
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public:
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enum { is_valid = (std::is_base_of<QObject, T>::value) };
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static const QMetaObject * get()
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{ return qtMetaObject<qt_meta_object<T>::is_valid, 0>::get(); }
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private:
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template <bool isQObject /* = false */, int dummy>
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struct qtMetaObject
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{ static inline const QMetaObject * get() { return NULL; } };
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template <int dummy>
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struct qtMetaObject<true, dummy>
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{ static inline const QMetaObject * get() { return (& T::staticMetaObject); } };
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};
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} // namespace trait
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} // namespace qx
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#endif // _QX_QT_META_OBJECT_H_
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