First - there's no way to do it. Second - that's probably the best anyway. This better mirrors standard C++ behavior in that non-polymophic (mono-morphic?) base classes do not have any access to drived data or functions. Third - there really is a a way to do it using one's own extended_type_info strategy - see docs and test_no_rtti. But I would only recommend this for those how can't use an rtti system and who do thier own dental work. Robert Ramey "Yan Zhang" <Yan.Zhang@mitchell.com> wrote in message news:F96935FCB9C3D549B3B6CD8915811A2F0FF00D8F@mail60nt.mitchell.com... Hi Robert, I know that it works for abstract base class. But if the base class is not abstract class how you do it? Is it possible? Thanks, yan ------------------------------------------------------------------------------ From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Monday, July 11, 2005 3:55 PM To: boost-users@lists.boost.org Subject: Re: [Boost-users] How to serialize a derived class object withbaseclass pointer? try making the base class a polymorphic class by adding the following changes: virtual ~CMyCls1() = 0; "Yan Zhang" <Yan.Zhang@mitchell.com> wrote in message news:F96935FCB9C3D549B3B6CD8915811A2F0FF00C7C@mail60nt.mitchell.com... Hi, I'm trying to serialize an object of derived class with a base class pointer, somehow only base class's serialization member function got called. Here is the code (simplified): class CMyCls1 { public: CMyCls1() : m(10) {} ~CMyCls1() {} private: friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(m); } int m; virtual ~CMyCls1() = 0; }; class CMyCls2 : public CMyCls1 { public: CMyCls2() : x(1.5) {} ~CMyCls2() {} private: friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(CMyCls1); ar & BOOST_SERIALIZATION_NVP(x); } double x; virtual ~CMyCls2(); }; void main () { CMyCls1 *pmycls = new CMyCls2; . oa.register_type(static_cast<CMyCls1 *>(NULL)); oa.register_type(static_cast<CMyCls2 *>(NULL)); oa << BOOST_SERIALIZATION_NVP(pmycls); . } Look at the archive file, only base class data is serialized. Actuall, CMyCls2::serialization() is not called at all. How do you serialize a derived class object with a pointer of base class? Thanks, Yan ---------------------------------------------------------------------------- _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ------------------------------------------------------------------------------ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users