I don't know the serialization lib in such details. All I know is that the code works. But you need the virtual foo() function in the class declaration and you need to have the BOOST_CLASS_EXPORT macros. Christian On 2/6/07, Aljaz wrote:

Hello.. I have a derived class serialization: for instance:

class client_request_base { public: client_request_base() : _type( 0 ) {} private: friend boost::serialization::access; template< class ARCHIVE > void serialize( ARCHIVE& ar, const unsigned int version ) { ar & _type; } unsigned int _type; };

class calc_skip_images_request : public client_request_base { public: calc_skip_images_request() : client_request_base( 1 ), _images_client( 0 ) {} private: friend boost::serialization::access; template< class ARCHIVE > void serialize( ARCHIVE& ar, const unsigned int version ) { ar & boost::serialization::base_object( *this ); ar & _images_client; } unsigned int _images_client; };

Now I wonder.. If I want to use serialization do I have do EXPORT second class? Or set first class to abstract? Like:

BOOST_IS_ABSTRACT( client_request_base ) BOOST_CLASS_EXPORT(calc_skip_images_request)

Im confused which of these two things is needed? When should I use export and when is abstract macro?

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I have another question.. When I want to export serialized data (derived class) do I have to use pointer or can I use 'referenced object'? std::istringstream archive_stream(data); boost::archive::text_iarchive archive(archive_stream); baseclass *t; archive & t; or can I do: baseclass t; archive & t;