#include <QtNetwork/qabstractsocket.h>
#ifndef QABSTRACTSOCKET_H
class QAbstractSocket: public QIODevice{
   /* Some contents are skipped to improve readability */
   public: enum SocketState{
      UnconnectedState = 0,
      HostLookupState = 1,
      ConnectingState = 2,
      ConnectedState = 3,
      BoundState = 4,
      ListeningState = 5,
      ClosingState = 6,
   };
   /* ... */
};
#endif // QABSTRACTSOCKET_H