From the code snippet, I can say that you are not serializing via a pointer to base class, since you serialize tmp which is an object, not a pointer (by the way, tmp is just an object of the base class... you would lose the information of *event if event pointed to a derived class).

Try changing: SENSOR_Event tmp = *event; oa << tmp; to just: oa << event; And also, include the BOOST_CLASS_EXPORT macro for the base class. Or, you can try doing (to see what it does): const SENSOR_Event tmp = *event; oa << tmp; but there, you are serializing a pointer, not an object. Jean-Noël -----Message d'origine----- De : boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] De la part de Tobias Combe Envoyé : mardi 28 février 2006 16:51 À : boost-users@lists.boost.org Objet : Re: [Boost-users] problem with serialization of pure virtual Jean Noel wrote:

You should send a code snippet.

Event.h: #include #include #include #include #include #include #include <fstream> class SENSOR_Event{ friend class Sensor; friend class AODVRTSensor; friend class OLSRRTSensor; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar.register<NodeEvent>(); ""// for each derived class ar & time; ar & sourceId; ar & sourceType; ar & eventType; ar & *data; } protected: double time; int sourceId; std::string sourceType; std::string eventType; DataNode *data; public: ... }; class NodeEvent : public SENSOR_Event{ private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::base_object(*this); } public: NodeEvent(); NodeEvent(double nodeId, double x, double y, double z, double speed); }; ...//other derived Events BOOST_CLASS_EXPORT(NodeEvent); ""// for each derived class BOOST_IS_ABSTRACT(SENSOR_Event); Sensor.cc: #include "Event.h" void Sensor::send(const SENSOR_Event *event){ ... // serialize to string std::stringstream s; boost::archive::text_oarchive oa(s); SENSOR_Event tmp = *event; oa << tmp; std::string p = s.str(); ... } Error: ... boost/archive/detail/oserializer.hpp: In function `void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive, T = SENSOR_Event]': boost/archive/basic_text_oarchive.hpp:78: instantiated from `void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = SENSOR_Event, Archive = boost::archive::text_oarchive]' boost/archive/detail/interface_oarchive.hpp:78: instantiated from `Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = SENSOR_Event, Archive = boost::archive::text_oarchive]' IDSNet/Sensor.cc:24: instantiated from here boost/archive/detail/oserializer.hpp:567: error: incomplete type ` boost::STATIC_ASSERTION_FAILURE<false>' does not have member `value'

What are the syntax error you get, and the error you get when doing a "BOOST_CLASS_EXPORT(derived);" ?

"syntax error before `;' token" for that line

I also have a problem with an abstract base class (although at link time, not compile time). Try removing the pure virtual function (just to see if it works).

this doesn't help

Another hint too would be to try to serialize a constant member; sometimes I had strange ASSERTION_FAILURE related to serialization of non-constants (this is also explained in the docs)

I'm serializing a constant member... _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users