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Packet

QDataStream

operator>>

operator<<

stream << somIntMember

error: \'int DG::Packet::_state\' is private
error: \'DG::Packet::PacketType DG::Packet::_type\' is private

namespace DG{
class Packet{
    public:
    struct CommonHeader{
        public:
            quint32 id;
            QTime time;
            quint32 size;
            PacketType packetType;
        public:
            CommonHeader();
            CommonHeader(quint32 sz, PacketType type);
            friend QDataStream& operator<<(QDataStream&, const Packet::CommonHeader& header);
            friend QDataStream& operator>>(QDataStream&, Packet::CommonHeader& header);
    };
private:
    PacketType _type;
    int _state;
public:
    friend QDataStream& operator<<(QDataStream&, const Packet& packet);
    friend QDataStream& operator>>(QDataStream&, Packet& packet);
};
}

#include \"packet.h\"
using namespace DG;
QDataStream& operator<<(QDataStream& stream, const Packet& packet){
    stream << packet._state << packet._type;
    return packet.serialize(stream);
}