qt-everywhere-src-5.15.1/qtwayland/src/compositor/global/qwaylandutils_p.h

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** This file is part of the QtWaylandCompositor module of the Qt Toolkit.
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#ifndef QWAYLANDUTILS_P_H
#define QWAYLANDUTILS_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>

struct wl_resource;

QT_BEGIN_NAMESPACE

namespace QtWayland {

template<typename return_type>
return_type fromResource(struct ::wl_resource *resource) {
    if (auto *r = std::remove_pointer<return_type>::type::Resource::fromResource(resource))
        return static_cast<return_type>(r->object());
    return nullptr;
}

} // namespace QtWayland

QT_END_NAMESPACE

#endif // QWAYLANDUTILS_P_H