Since the demo doesn't use BOOST_EXPORT, I suspect that that there is some sort of problem related to instantiation of abstract base class code for exported types. I'lll look into it. If you can look into it, thank you, Robert. I have finished the organization of my (big) project serialization into separate files for each class, and now everything is working fine ! :) However, I still have the problem that every time I use a std::vector of pointers, and serialize it as such, there is a compile time error, since extended_type_info for the std::vector is not defined. This is a bug since type info should not matter here. My workaround was to use a BOOST_CLASS_TYPE_INFO(std::vector< ClassPointedTo *>, extended_type_info_no_rtti< std::vector< ClassPointedTo *> >) everytime such a vector occurs. However, if you can look into this problem and fix it, Robert, this would appreciated. I could then remove my workaround code, which makes my code ugly :) Jean-Noël -----Message d'origine----- De : boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] De la part de Robert Ramey Envoyé : jeudi 2 mars 2006 03:49 À : boost-users@lists.boost.org Objet : Re: [Boost-users] Serialization: docs regarding abstract base class Note that the tutorial programs do use BOOST_IS_ABSTRACT so I've always assumed that it functions as advertised. Since the demo doesn't use BOOST_EXPORT, I suspect that that there is some sort of problem related to instantiation of abstract base class code for exported types. I'lll look into it. Robert Ramey "RIVASSEAU Jean Noel" wrote in message news:87F60F7FA02FF749AFB02BD9FCAA6B04DE1BE3@naserv31.nanterre.oberthurcs.com... I quote the Boost serialization docs: When serializing an object through a pointer to its base class and that base class is abstract (i.e. has at least one virtual function assigned a value of 0), A compile error will be emitted. This is addressable in one over several ways: remove the =0 in the base classes so that the base class is no longer abstract. implement is_abstract for your compiler. (code written according to the C++ standard is included with this library. But it is known to fail on several compilers. If the compiler suports "is_abstract" type trait - use that. Otherwise assume a class is NOT abstract unless BOOST_IS_ABSTRACT has been set for the class. use the macro BOOST_IS_ABSTRACT(my_class) to indicate that the class is an abstract base class. This will cause the compiler to avoid generating code that causes this error. I still do not understand part 2 of this advice, Robert. Could you explain? Jean-Noël Ps: as already mentioned, part 3 does not change anything for me, and I'd like to avoid the solution of part 1 since I do want the base class to be abstract. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users