#include <QtNetwork/qabstractsocket.h>
#ifndef QABSTRACTSOCKET_H
class QAbstractSocket: public QIODevice{
   /* Some contents are skipped to improve readability */
   public: enum SocketError{
      ConnectionRefusedError = 0,
      RemoteHostClosedError = 1,
      HostNotFoundError = 2,
      SocketAccessError = 3,
      SocketResourceError = 4,
      SocketTimeoutError = 5,
      DatagramTooLargeError = 6,
      NetworkError = 7,
      AddressInUseError = 8,
      SocketAddressNotAvailableError = 9,
      UnsupportedSocketOperationError = 10,
      UnknownSocketError = -1,
   };
   /* ... */
};
#endif // QABSTRACTSOCKET_H