#pragma clang system_header namespace QtPrivate { struct QSlotObjectBase {}; } namespace Qt { enum ConnectionType {}; } struct QMetaObject { struct Connection {}; }; struct QObject { static QMetaObject::Connection connectImpl(const QObject *, void **, const QObject *, void **, QtPrivate::QSlotObjectBase *, Qt::ConnectionType, const int *, const QMetaObject *); }; struct QEvent { enum Type { None }; QEvent(Type) {} }; struct QCoreApplication : public QObject { static void postEvent(QObject *receiver, QEvent *event); static QCoreApplication *instance(); }; struct QApplication : public QCoreApplication {};