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#include <QtCore/qglobal.h>

#ifndef QNATIVEINTERFACE_H
#define QNATIVEINTERFACE_H

QT_BEGIN_NAMESPACE

// Ensures that the interface's typeinfo is exported so that
// dynamic casts work reliably, and protects the destructor
// so that pointers to the interface can't be deleted.
#define QT_DECLARE_NATIVE_INTERFACE(InterfaceClass) \
    protected: virtual ~InterfaceClass(); public:

// Declares an accessor for the native interface
#define QT_DECLARE_NATIVE_INTERFACE_ACCESSOR \
    template <typename QNativeInterface> \
    QNativeInterface *nativeInterface() const;

// Provides a definition for the interface destructor
#define QT_DEFINE_NATIVE_INTERFACE_2(Namespace, InterfaceClass) \
    QT_PREPEND_NAMESPACE(Namespace)::InterfaceClass::~InterfaceClass() = default

// Provides a definition for the destructor, and an explicit
// template instantiation of the native interface accessor.
#define QT_DEFINE_NATIVE_INTERFACE_3(Namespace, InterfaceClass, PublicClass) \
    QT_DEFINE_NATIVE_INTERFACE_2(Namespace, InterfaceClass); \
    template Q_DECL_EXPORT QT_PREPEND_NAMESPACE(Namespace)::InterfaceClass *PublicClass::nativeInterface() const

#define QT_DEFINE_NATIVE_INTERFACE(...) QT_OVERLOADED_MACRO(QT_DEFINE_NATIVE_INTERFACE, QNativeInterface, __VA_ARGS__)
#define QT_DEFINE_PRIVATE_NATIVE_INTERFACE(...) QT_OVERLOADED_MACRO(QT_DEFINE_NATIVE_INTERFACE, QNativeInterface::Private, __VA_ARGS__)

QT_END_NAMESPACE

#endif // QNATIVEINTERFACE_H