Re: [Boost-users] Serialization withpolymorphic_*_archiveandBOOST_CLASS_EXPORT

From: Robert Ramey (ramey_at_[hidden])
Date: 2006-11-07 11:51:59

Anders Wang Kristensen wrote:
> Thanks for your swift reply!
>
> In my example with the non-templated serialize with
> polymorphic_iarchive the statement BOOST_CLASS_EXPORT(B) fails to
> compile. It compiles
> fine without that statement, but fails to serialize with asserion:
> Assertion failed: NULL != bpos_ptr, file
> include\boost\archive\detail\oserializer.hpp, line 418
> If I manully register B with register_type it works.
>
> I'm using VC8 and boost 1.33.1 and I've attached the error message
> from compiling.
>
> -- Anders

Try the following:

>> int main(int argc, const char* argv[]){
>>    boost::shared_ptr<const A> a(new B); // Note "const"
>>    boost::shared_ptr<A> a1;
>>    std::stringstream ss;
>>   {
>>        boost::archive::polymorphic_text_oarchive oa(ss);
>>        //oa.template register_type<B>();
>>       oa << BOOST_SERIALIZATION_NVP(a);
>>    }
>>    try{
>>        boost::archive::polymorphic_text_iarchive ia(ss);
>>        //ia.template register_type<B>();
>>        ia >> BOOST_SERIALIZATION_NVP(a1);
>>    }
>>    catch(...){
>>        ...
>>    }
>>    B* x = dynamic_cast<B*>(a.get());
>>    B* y = dynamic_cast<B*>(b.get());
>>
>>    assert(*x == *y);
>>    return 0;
>> }

Also I strongly recommend you used templated serialize functions.

Robert Ramey

> 1>Compiling...
> 1>_main.cpp
> 1>include\boost\serialization\access.hpp(109) : error C2664: 'void
> B::serialize(boost::archive::polymorphic_iarchive &,const unsigned
> int)' : cannot convert parameter 1 from
> 'boost::archive::text_oarchive' to
> 'boost::archive::polymorphic_iarchive &' 1>
> include\boost\serialization\serialization.hpp(81) : see reference to
> function template instantiation 'void
> boost::serialization::access::serialize<Archive,T>(Archive &,T
> &,const unsigned int)' being compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\serialization.hpp(140) : see
> reference to function template instantiation 'void
> boost::serialization::serialize<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(152) : see
> reference to function template instantiation 'void
> boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(145) : while
> compiling class template member function 'void
> boost::archive::detail::oserializer<Archive,T>::save_object_data(boost::archive::detail::basic_oarchive
>
> &,const void *) const'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(163) : see
> reference to class template instantiation
> 'boost::archive::detail::oserializer<Archive,T>' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(162) : while
> compiling class template member function 'const
> boost::archive::detail::basic_oserializer
> &boost::archive::detail::pointer_oserializer<T,Archive>::get_basic_serializer(void)
> const'
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::text_oarchive
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(515) : see
> reference to class template instantiation
> 'boost::archive::detail::pointer_oserializer<T,Archive>' being
> compiled 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::text_oarchive
> 1>        ]
> 1>        include\boost\serialization\export.hpp(86) : see reference
> to function template instantiation 'const
> boost::archive::detail::basic_pointer_oserializer
> &boost::archive::detail::instantiate_pointer_oserializer<Archive,T>(Archive
> *,T *)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(82) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::o::invoke(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(105) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>::o' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(89) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(116) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(115) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::for_each_archive<ASeq,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>            ASeq=boost::archive::detail::known_archive_types::type,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(132) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::for_each_archive<ASeq,T>' being
> compiled
> 1>        with
> 1>        [
> 1>            ASeq=boost::archive::detail::known_archive_types::type,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(131) : while
> compiling class template member function
> 'boost::archive::detail::export_generator<T,ASeq>::export_generator(void)'
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>        include\boost\serialization\export.hpp(177) : see reference
> to class template instantiation
> 'boost::archive::detail::export_generator<T,ASeq>' being compiled
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>        include\boost\serialization\export.hpp(176) : while
> compiling class template member function 'const
> boost::archive::detail::export_generator<T,ASeq>
> *boost::archive::detail::export_instance<T,ASeq>::not_abstract::invoke(void)'
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>        include\boost\serialization\export.hpp(192) : see reference
> to class template instantiation
> 'boost::archive::detail::export_instance<T,ASeq>::not_abstract' being
> compiled
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>        include\boost\serialization\export.hpp(211) : see reference
> to function template instantiation 'std::pair<_Ty1,_Ty2>
> boost::archive::detail::export_instance_invoke<T,ASeq>(void)' being
> compiled 1>        with
> 1>        [
> 1>            _Ty1=const
> boost::archive::detail::export_generator<B,boost::archive::detail::known_archive_types::type>
>
> *,
> 1>            _Ty2=const boost::archive::detail::guid_initializer<B>
> *, 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>        include\boost\serialization\export.hpp(210) : while
> compiling class template member function 'std::pair<_Ty1,_Ty2>
> boost::archive::detail::export_archives<T,ASeq>::non_empty_archive_list::invoke(void)'
> 1>        with
> 1>        [
> 1>            _Ty1=const
> boost::archive::detail::export_generator<B,boost::archive::detail::known_archive_types::type>
>
> *,
> 1>            _Ty2=const boost::archive::detail::guid_initializer<B>
> *, 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>        include\boost\serialization\export.hpp(225) : see reference
> to class template instantiation
> 'boost::archive::detail::export_archives<T,ASeq>::non_empty_archive_list'
> being compiled
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            ASeq=boost::archive::detail::known_archive_types::type
> 1>        ]
> 1>
> c:\users\awk\desktop\work\code\src\tests\scenegraph_regression\_main.cpp(129)
>> see reference to function template instantiation
>> 'std::pair<_Ty1,_Ty2>
> boost::archive::detail::export_archives_invoke<B,boost::archive::detail::known_archive_types::type>(B
>
> &,boost::archive::detail::known_archive_types::type &)' being compiled
> 1>        with
> 1>        [
> 1>            _Ty1=const
> boost::archive::detail::export_generator<B,boost::archive::detail::known_archive_types::type>
>
> *,
> 1>            _Ty2=const boost::archive::detail::guid_initializer<B> *
> 1>        ]
> 1>include\boost\serialization\access.hpp(109) : error C2664: 'void
> B::serialize(boost::archive::polymorphic_iarchive &,const unsigned
> int)' : cannot convert parameter 1 from
> 'boost::archive::text_iarchive' to
> 'boost::archive::polymorphic_iarchive &' 1>
> include\boost\serialization\serialization.hpp(81) : see reference to
> function template instantiation 'void
> boost::serialization::access::serialize<Archive,T>(Archive &,T
> &,const unsigned int)' being compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\serialization.hpp(140) : see
> reference to function template instantiation 'void
> boost::serialization::serialize<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(164) : see
> reference to function template instantiation 'void
> boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(157) : while
> compiling class template member function 'void
> boost::archive::detail::iserializer<Archive,T>::load_object_data(boost::archive::detail::basic_iarchive
>
> &,void *,const unsigned int) const'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(175) : see
> reference to class template instantiation
> 'boost::archive::detail::iserializer<Archive,T>' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(174) : while
> compiling class template member function 'const
> boost::archive::detail::basic_iserializer
> &boost::archive::detail::pointer_iserializer<T,Archive>::get_basic_serializer(void)
> const'
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::text_iarchive
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(546) : see
> reference to class template instantiation
> 'boost::archive::detail::pointer_iserializer<T,Archive>' being
> compiled 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::text_iarchive
> 1>        ]
> 1>        include\boost\serialization\export.hpp(78) : see reference
> to function template instantiation 'const
> boost::archive::detail::basic_pointer_iserializer
> &boost::archive::detail::instantiate_pointer_iserializer<Archive,T>(Archive
> *,T *)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(74) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::i::invoke(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(105) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>::i' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(89) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(116) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::text_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(115) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::for_each_archive<ASeq,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>
> ASeq=boost::mpl::list5<boost::archive::text_iarchive,boost::archive::xml_oarchive,boost::archive::xml_iarchive,boost::archive::polymorphic_oarchive,boost::archive::polymorphic_iarchive>,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(122) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::for_each_archive<ASeq,T>' being
> compiled
> 1>        with
> 1>        [
> 1>
> ASeq=boost::mpl::list5<boost::archive::text_iarchive,boost::archive::xml_oarchive,boost::archive::xml_iarchive,boost::archive::polymorphic_oarchive,boost::archive::polymorphic_iarchive>,
> 1>            T=B
> 1>        ]
> 1>include\boost\serialization\access.hpp(109) : error C2664: 'void
> B::serialize(boost::archive::polymorphic_iarchive &,const unsigned
> int)' : cannot convert parameter 1 from
> 'boost::archive::xml_oarchive' to
> 'boost::archive::polymorphic_iarchive &' 1>
> include\boost\serialization\serialization.hpp(81) : see reference to
> function template instantiation 'void
> boost::serialization::access::serialize<Archive,T>(Archive &,T
> &,const unsigned int)' being compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\serialization.hpp(140) : see
> reference to function template instantiation 'void
> boost::serialization::serialize<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(152) : see
> reference to function template instantiation 'void
> boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(145) : while
> compiling class template member function 'void
> boost::archive::detail::oserializer<Archive,T>::save_object_data(boost::archive::detail::basic_oarchive
>
> &,const void *) const'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(163) : see
> reference to class template instantiation
> 'boost::archive::detail::oserializer<Archive,T>' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(162) : while
> compiling class template member function 'const
> boost::archive::detail::basic_oserializer
> &boost::archive::detail::pointer_oserializer<T,Archive>::get_basic_serializer(void)
> const'
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::xml_oarchive
> 1>        ]
> 1>        include\boost\archive\detail\oserializer.hpp(515) : see
> reference to class template instantiation
> 'boost::archive::detail::pointer_oserializer<T,Archive>' being
> compiled 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::xml_oarchive
> 1>        ]
> 1>        include\boost\serialization\export.hpp(86) : see reference
> to function template instantiation 'const
> boost::archive::detail::basic_pointer_oserializer
> &boost::archive::detail::instantiate_pointer_oserializer<Archive,T>(Archive
> *,T *)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(82) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::o::invoke(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(105) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>::o' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(89) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(116) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_oarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(115) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::for_each_archive<ASeq,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>
> ASeq=boost::mpl::list4<boost::archive::xml_oarchive,boost::archive::xml_iarchive,boost::archive::polymorphic_oarchive,boost::archive::polymorphic_iarchive>,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(122) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::for_each_archive<ASeq,T>' being
> compiled
> 1>        with
> 1>        [
> 1>
> ASeq=boost::mpl::list4<boost::archive::xml_oarchive,boost::archive::xml_iarchive,boost::archive::polymorphic_oarchive,boost::archive::polymorphic_iarchive>,
> 1>            T=B
> 1>        ]
> 1>include\boost\serialization\access.hpp(109) : error C2664: 'void
> B::serialize(boost::archive::polymorphic_iarchive &,const unsigned
> int)' : cannot convert parameter 1 from
> 'boost::archive::xml_iarchive' to
> 'boost::archive::polymorphic_iarchive &' 1>
> include\boost\serialization\serialization.hpp(81) : see reference to
> function template instantiation 'void
> boost::serialization::access::serialize<Archive,T>(Archive &,T
> &,const unsigned int)' being compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\serialization.hpp(140) : see
> reference to function template instantiation 'void
> boost::serialization::serialize<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(164) : see
> reference to function template instantiation 'void
> boost::serialization::serialize_adl<Archive,T>(Archive &,T &,const
> unsigned int)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(157) : while
> compiling class template member function 'void
> boost::archive::detail::iserializer<Archive,T>::load_object_data(boost::archive::detail::basic_iarchive
>
> &,void *,const unsigned int) const'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(175) : see
> reference to class template instantiation
> 'boost::archive::detail::iserializer<Archive,T>' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(174) : while
> compiling class template member function 'const
> boost::archive::detail::basic_iserializer
> &boost::archive::detail::pointer_iserializer<T,Archive>::get_basic_serializer(void)
> const'
> 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::xml_iarchive
> 1>        ]
> 1>        include\boost\archive\detail\iserializer.hpp(546) : see
> reference to class template instantiation
> 'boost::archive::detail::pointer_iserializer<T,Archive>' being
> compiled 1>        with
> 1>        [
> 1>            T=B,
> 1>            Archive=boost::archive::xml_iarchive
> 1>        ]
> 1>        include\boost\serialization\export.hpp(78) : see reference
> to function template instantiation 'const
> boost::archive::detail::basic_pointer_iserializer
> &boost::archive::detail::instantiate_pointer_iserializer<Archive,T>(Archive
> *,T *)' being compiled
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(74) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::i::invoke(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(105) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>::i' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(89) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::archive<Archive,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(116) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::archive<Archive,T>' being
> compiled 1>        with
> 1>        [
> 1>            Archive=boost::archive::xml_iarchive,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(115) : while
> compiling class template member function 'void
> boost::archive::detail::export_impl::for_each_archive<ASeq,T>::instantiate(void)'
> 1>        with
> 1>        [
> 1>
> ASeq=boost::mpl::list3<boost::archive::xml_iarchive,boost::archive::polymorphic_oarchive,boost::archive::polymorphic_iarchive>,
> 1>            T=B
> 1>        ]
> 1>        include\boost\serialization\export.hpp(122) : see reference
> to class template instantiation
> 'boost::archive::detail::export_impl::for_each_archive<ASeq,T>' being
> compiled
> 1>        with
> 1>        [
> 1>
> ASeq=boost::mpl::list3<boost::archive::xml_iarchive,boost::archive::polymorphic_oarchive,boost::archive::polymorphic_iarchive>,
> 1>            T=B
> 1>        ]
>
> ----- Original Message -----
> From: "Robert Ramey" <ramey_at_[hidden]>
> Newsgroups: gmane.comp.lib.boost.user
> Sent: Tuesday, November 07, 2006 2:42 AM
> Subject: Re: Serialization with
> polymorphic_*_archiveandBOOST_CLASS_EXPORT
>
>
>> Anders Wang Kristensen wrote:
>>> Hi,
>>>
>>> I'm having trouble serializing through the a pointer to the base as
>>> shown below.
>>> If I manually register class B with template register_type<B>() it
>>> works, but I
>>> would rather use the BOOST_CLASS_EXPORT macros since that is more
>>> convenient.
>>>
>>> Unfortunately BOOST_CLASS_EXPORT  assumes you are using the
>>> templated version of serialize, and not
>>> polymorphic_iarchive/oarchive, that I'm using.
>>
>> I don't think that's true. Maybe you mean it assums you are using
>> member serialize functions - but that won't be true either.
>>
>> Basically I think your example should function.  Where does it fail?
>> Does it throw and exception? where? does the assert fail?, etc.,etc.
>> Also what compiler, os, version of boost etc.?
>>
>> Though its beside the point, I would also make your example more
>> portable wit the fillowing
>> changes:
>>
>> ...
>> struct A {
>>    template<class Archive>
>>    void serialize(Archive & ar, const unsigned int file_version);
>>    ...
>> };
>> template<class Archive>
>> void A::serialize(Archive & ar, const unsigned int file_version){
>>    ar & BOOST_SERIALIZATION_NVP(data);
>> }
>>
>> struct B : public A {
>>    template<class Archive>
>>    void serialize(Archive & ar, const unsigned int file_version);
>>    ...
>> };
>>
>> template<class Archive>
>> void B::serialize(Archive & ar, const unsigned int file_version){
>>    ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(A);
>>    ar & BOOST_SERIALIZATION_NVP(foo);
>> }
>>
>> BOOST_CLASS_EXPORT(B)
>>
>> int main(int argc, const char* argv[]){
>>    boost::shared_ptr<A> a(new B);
>>    boost::shared_ptr<A> a1;
>>    std::stringstream ss;
>>   {
>>        boost::archive::polymorphic_text_oarchive oa(ss);
>>        //oa.template register_type<B>();
>>       oa << BOOST_SERIALIZATION_NVP(a);
>>    }
>>    try{
>>        boost::archive::polymorphic_text_iarchive ia(ss);
>>        //ia.template register_type<B>();
>>        ia >> BOOST_SERIALIZATION_NVP(a1);
>>    }
>>    catch(...){
>>        ...
>>    }
>>    B* x = dynamic_cast<B*>(a.get());
>>    B* y = dynamic_cast<B*>(b.get());
>>
>>    assert(*x == *y);
>>    return 0;
>> }
>
> ----- Original Message -----
> From: "Robert Ramey" <ramey_at_[hidden]>
> Newsgroups: gmane.comp.lib.boost.user
> Sent: Tuesday, November 07, 2006 2:42 AM
> Subject: Re: Serialization with
> polymorphic_*_archiveandBOOST_CLASS_EXPORT
>
>
>> Anders Wang Kristensen wrote:
>>> Hi,
>>>
>>> I'm having trouble serializing through the a pointer to the base as
>>> shown below.
>>> If I manually register class B with template register_type<B>() it
>>> works, but I
>>> would rather use the BOOST_CLASS_EXPORT macros since that is more
>>> convenient.
>>>
>>> Unfortunately BOOST_CLASS_EXPORT  assumes you are using the
>>> templated version of serialize, and not
>>> polymorphic_iarchive/oarchive, that I'm using.
>>
>> I don't think that's true. Maybe you mean it assums you are using
>> member serialize functions - but that won't be true either.
>>
>> Basically I think your example should function.  Where does it fail?
>> Does it throw and exception? where? does the assert fail?, etc.,etc.
>> Also what compiler, os, version of boost etc.?
>>
>> Though its beside the point, I would also make your example more
>> portable wit the fillowing
>> changes:
>>
>> ...
>> struct A {
>>    template<class Archive>
>>    void serialize(Archive & ar, const unsigned int file_version);
>>    ...
>> };
>> template<class Archive>
>> void A::serialize(Archive & ar, const unsigned int file_version){
>>    ar & BOOST_SERIALIZATION_NVP(data);
>> }
>>
>> struct B : public A {
>>    template<class Archive>
>>    void serialize(Archive & ar, const unsigned int file_version);
>>    ...
>> };
>>
>> template<class Archive>
>> void B::serialize(Archive & ar, const unsigned int file_version){
>>    ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(A);
>>    ar & BOOST_SERIALIZATION_NVP(foo);
>> }
>>
>> BOOST_CLASS_EXPORT(B)
>>
>> int main(int argc, const char* argv[]){
>>    boost::shared_ptr<A> a(new B);
>>    boost::shared_ptr<A> a1;
>>    std::stringstream ss;
>>   {
>>        boost::archive::polymorphic_text_oarchive oa(ss);
>>        //oa.template register_type<B>();
>>       oa << BOOST_SERIALIZATION_NVP(a);
>>    }
>>    try{
>>        boost::archive::polymorphic_text_iarchive ia(ss);
>>        //ia.template register_type<B>();
>>        ia >> BOOST_SERIALIZATION_NVP(a1);
>>    }
>>    catch(...){
>>        ...
>>    }
>>    B* x = dynamic_cast<B*>(a.get());
>>    B* y = dynamic_cast<B*>(b.get());
>>
>>    assert(*x == *y);
>>    return 0;
>> }