Re: [Boost-users] question about boost serialization library

From: Hughes, James (jhughes_at_[hidden])
Date: 2007-07-06 05:08:09

You need to put the archive header files before the rest...

#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp> 

Then

#include <boost/serialization/nvp.hpp>
#include <boost/serialization/utility.hpp>
#include <boost/serialization/map.hpp>
#include <boost/serialization/version.hpp>

I think this issue of ordering (which continually catches me out with
its huge list of obscure error messages!) has been fixed in the latest
version, but Mr Ramey will be able to confirm that.

James

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] 
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of Fei Liu
> Sent: 05 July 2007 15:35
> To: boost-users_at_[hidden]; ramey_at_[hidden]; Fei Liu
> Subject: [Boost-users] question about boost serialization library
> 
> Hello, I am trying out the boost serialization library. I've gotten 
> demo_xml.cpp to work correctly. Now I want to serialize a customized 
> class but I got some errors I don't fully understand. Here is teh 
> complete source code and error. Judging from the error it seems I am 
> missing something. But I've compared with demo_xml.cpp and I am lost. 
> Any help is appreciated.
> 
> #include <string>
> #include <iomanip>
> #include <iostream>
> #include <sstream>
> 
> #include <boost/serialization/nvp.hpp>
> #include <boost/serialization/utility.hpp>
> #include <boost/serialization/map.hpp>
> #include <boost/serialization/version.hpp>
> #include <boost/archive/xml_iarchive.hpp>
> #include <boost/archive/xml_oarchive.hpp>
> 
> 
> class demo{
> 
> private:
> std::map<std::string, std::string> attrs;
> public:
> demo(const std::string & key, const std::string & value){
> attrs[key] = value;
> }
> demo & insert(const std::string & key, const std::string & value){
> attrs[key] = value;
> return *this;
> }
> 
> void save(std::ostream & os){
> assert(os.good());
> boost::archive::xml_oarchive oa(os);
> oa << BOOST_SERIALIZATION_NVP(*this);
> }
> 
> void restore(std::istream & is){
> assert(is.good());
> boost::archive::xml_iarchive ia(is);
> ia >> BOOST_SERIALIZATION_NVP(*this);
> }
> friend class boost::serialization::access;
> friend std::ostream & operator<<(std::ostream &os, const demo &bs);
> template<class Archive>
> void serialize(Archive &ar, const unsigned int version)
> {
> ar & BOOST_SERIALIZATION_NVP(attrs);
> }
> };
> BOOST_CLASS_VERSION(demo, 1)
> 
> std::ostream & operator<<(std::ostream &os, const demo &bs)
> {
> std::map<std::string, std::string>::const_iterator it;
> for(it = bs.attrs.begin(); it != bs.attrs.end(); it++){
> os << it->first << it->second;
> }
> return os;
> }
> 
> int main(){
> demo x("a", "abcde");
> x.insert("b", "badfaf");
> 
> std::ostringstream os;
> std::istringstream is;
> 
> x.save(os);
> std::cout << x;
> is.str(os.str());
> x.restore(is);
> std::cout << x;
> }
> g++ -fstrict-aliasing -fomit-frame-pointer -Wall -pedantic 
> -ansi -g -O2 
> boost_s_map.cpp -o boost_s_map -lboost_serialization
> /usr/include/boost/archive/detail/oserializer.hpp: In constructor 
> 'boost::archive::detail::oserializer<Archive, T>::oserializer() [with 
> Archive = boost::archive::xml_oarchive, T = demo]':
> /usr/include/boost/archive/detail/oserializer.hpp:135: 
> instantiated from 
> 'static boost::archive::detail::oserializer<Archive, T>& 
> boost::archive::detail::oserializer<Archive, T>::instantiate() [with 
> Archive = boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/archive/detail/oserializer.hpp:264: 
> instantiated from 
> 'static void boost::archive::detail::save_non_pointer_type<Archive, 
> T>::save_standard::invoke(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/archive/detail/oserializer.hpp:322: 
> instantiated from 
> 'static void boost::archive::detail::save_non_pointer_type<Archive, 
> T>::invoke(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/archive/detail/oserializer.hpp:536: 
> instantiated from 
> 'void boost::archive::save(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/archive/basic_xml_oarchive.hpp:99: 
> instantiated from 
> 'void 
> boost::archive::basic_xml_oarchive<Archive>::save_override(const 
> boost::serialization::nvp<T>&, int) [with T = demo, Archive = 
> boost::archive::xml_oarchive]'
> /usr/include/boost/archive/detail/interface_oarchive.hpp:78: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) 
> [with T = const boost::serialization::nvp<demo>, Archive = 
> boost::archive::xml_oarchive]'
> boost_s_map.cpp:30: instantiated from here
> /usr/include/boost/archive/detail/oserializer.hpp:107: error: 
> incomplete 
> type 'boost::serialization::extended_type_info_null<demo>' used in 
> nested name specifier
> /usr/include/boost/archive/detail/iserializer.hpp: In constructor 
> 'boost::archive::detail::iserializer<Archive, T>::iserializer() [with 
> Archive = boost::archive::xml_iarchive, T = demo]':
> /usr/include/boost/archive/detail/iserializer.hpp:146: 
> instantiated from 
> 'static boost::archive::detail::iserializer<Archive, T>& 
> boost::archive::detail::iserializer<Archive, T>::instantiate() [with 
> Archive = boost::archive::xml_iarchive, T = demo]'
> /usr/include/boost/archive/detail/iserializer.hpp:375: 
> instantiated from 
> 'static void boost::archive::detail::load_non_pointer_type<Archive, 
> T>::load_standard::invoke(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T = demo]'
> /usr/include/boost/archive/detail/iserializer.hpp:425: 
> instantiated from 
> 'static void boost::archive::detail::load_non_pointer_type<Archive, 
> T>::invoke(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T 
> = demo]'
> /usr/include/boost/archive/detail/iserializer.hpp:572: 
> instantiated from 
> 'void boost::archive::load(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T = demo]'
> /usr/include/boost/archive/basic_xml_iarchive.hpp:80: 
> instantiated from 
> 'void 
> boost::archive::basic_xml_iarchive<Archive>::load_override(const 
> boost::serialization::nvp<T>&, int) [with T = demo, Archive = 
> boost::archive::xml_iarchive]'
> /usr/include/boost/archive/xml_iarchive.hpp:74: instantiated 
> from 'void 
> boost::archive::xml_iarchive_impl<Archive>::load_override(T&, 
> int) [with 
> T = const boost::serialization::nvp<demo>, Archive = 
> boost::archive::xml_iarchive]'
> /usr/include/boost/archive/detail/interface_iarchive.hpp:76: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) 
> [with T = const boost::serialization::nvp<demo>, Archive = 
> boost::archive::xml_iarchive]'
> boost_s_map.cpp:36: instantiated from here
> /usr/include/boost/archive/detail/iserializer.hpp:114: error: 
> incomplete 
> type 'boost::serialization::extended_type_info_null<demo>' used in 
> nested name specifier
> /usr/include/boost/archive/detail/iserializer.hpp: In member function 
> 'bool boost::archive::detail::iserializer<Archive, 
> T>::is_polymorphic() 
> const [with Archive = boost::archive::xml_iarchive, T = demo]':
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/iserializer.hpp:142: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/archive/detail/iserializer.hpp:143: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/archive/detail/oserializer.hpp: In member function 
> 'bool boost::archive::detail::oserializer<Archive, 
> T>::is_polymorphic() 
> const [with Archive = boost::archive::xml_oarchive, T = demo]':
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/oserializer.hpp:131: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/archive/detail/oserializer.hpp:132: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<demo>'
> /usr/include/boost/archive/detail/oserializer.hpp: In constructor 
> 'boost::archive::detail::oserializer<Archive, T>::oserializer() [with 
> Archive = boost::archive::xml_oarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]':
> /usr/include/boost/archive/detail/oserializer.hpp:135: 
> instantiated from 
> 'static boost::archive::detail::oserializer<Archive, T>& 
> boost::archive::detail::oserializer<Archive, T>::instantiate() [with 
> Archive = boost::archive::xml_oarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:264: 
> instantiated from 
> 'static void boost::archive::detail::save_non_pointer_type<Archive, 
> T>::save_standard::invoke(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:322: 
> instantiated from 
> 'static void boost::archive::detail::save_non_pointer_type<Archive, 
> T>::invoke(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:536: 
> instantiated from 
> 'void boost::archive::save(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/archive/basic_xml_oarchive.hpp:99: 
> instantiated from 
> 'void 
> boost::archive::basic_xml_oarchive<Archive>::save_override(const 
> boost::serialization::nvp<T>&, int) [with T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >, Archive = 
> boost::archive::xml_oarchive]'
> /usr/include/boost/archive/detail/interface_oarchive.hpp:78: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) 
> [with T = const 
> boost::serialization::nvp<std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >, Archive = boost::archive::xml_oarchive]'
> /usr/include/boost/archive/detail/interface_oarchive.hpp:86: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_oarchive<Archive>::operator&
> (T&) [with 
> T = const boost::serialization::nvp<std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >, Archive = boost::archive::xml_oarchive]'
> boost_s_map.cpp:43: instantiated from 'void demo::serialize(Archive&, 
> unsigned int) [with Archive = boost::archive::xml_oarchive]'
> /usr/include/boost/serialization/access.hpp:109: instantiated from 
> 'static void boost::serialization::access::serialize(Archive&, T&, 
> unsigned int) [with Archive = boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/serialization/serialization.hpp:81: 
> instantiated from 
> 'void boost::serialization::serialize(Archive&, T&, unsigned 
> int) [with 
> Archive = boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/serialization/serialization.hpp:140: instantiated 
> from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned 
> int) [with Archive = boost::archive::xml_oarchive, T = demo]'
> /usr/include/boost/archive/detail/oserializer.hpp:148: 
> instantiated from 
> 'void boost::archive::detail::oserializer<Archive, 
> T>::save_object_data(boost::archive::detail::basic_oarchive&, const 
> void*) const [with Archive = boost::archive::xml_oarchive, T = demo]'
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/oserializer.hpp:107: error: 
> incomplete 
> type 
> 'boost::serialization::extended_type_info_null<std::map<std::b
> asic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >' used in nested name specifier
> /usr/include/boost/archive/detail/iserializer.hpp: In constructor 
> 'boost::archive::detail::iserializer<Archive, T>::iserializer() [with 
> Archive = boost::archive::xml_iarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]':
> /usr/include/boost/archive/detail/iserializer.hpp:146: 
> instantiated from 
> 'static boost::archive::detail::iserializer<Archive, T>& 
> boost::archive::detail::iserializer<Archive, T>::instantiate() [with 
> Archive = boost::archive::xml_iarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:375: 
> instantiated from 
> 'static void boost::archive::detail::load_non_pointer_type<Archive, 
> T>::load_standard::invoke(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:425: 
> instantiated from 
> 'static void boost::archive::detail::load_non_pointer_type<Archive, 
> T>::invoke(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T 
> = std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:572: 
> instantiated from 
> 'void boost::archive::load(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/archive/basic_xml_iarchive.hpp:80: 
> instantiated from 
> 'void 
> boost::archive::basic_xml_iarchive<Archive>::load_override(const 
> boost::serialization::nvp<T>&, int) [with T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >, Archive = 
> boost::archive::xml_iarchive]'
> /usr/include/boost/archive/xml_iarchive.hpp:74: instantiated 
> from 'void 
> boost::archive::xml_iarchive_impl<Archive>::load_override(T&, 
> int) [with 
> T = const boost::serialization::nvp<std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >, Archive = boost::archive::xml_iarchive]'
> /usr/include/boost/archive/detail/interface_iarchive.hpp:76: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) 
> [with T = const 
> boost::serialization::nvp<std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >, Archive = boost::archive::xml_iarchive]'
> /usr/include/boost/archive/detail/interface_iarchive.hpp:83: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_iarchive<Archive>::operator&
> (T&) [with 
> T = const boost::serialization::nvp<std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >, Archive = boost::archive::xml_iarchive]'
> boost_s_map.cpp:43: instantiated from 'void demo::serialize(Archive&, 
> unsigned int) [with Archive = boost::archive::xml_iarchive]'
> /usr/include/boost/serialization/access.hpp:109: instantiated from 
> 'static void boost::serialization::access::serialize(Archive&, T&, 
> unsigned int) [with Archive = boost::archive::xml_iarchive, T = demo]'
> /usr/include/boost/serialization/serialization.hpp:81: 
> instantiated from 
> 'void boost::serialization::serialize(Archive&, T&, unsigned 
> int) [with 
> Archive = boost::archive::xml_iarchive, T = demo]'
> /usr/include/boost/serialization/serialization.hpp:140: instantiated 
> from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned 
> int) [with Archive = boost::archive::xml_iarchive, T = demo]'
> /usr/include/boost/archive/detail/iserializer.hpp:160: 
> instantiated from 
> 'void boost::archive::detail::iserializer<Archive, 
> T>::load_object_data(boost::archive::detail::basic_iarchive&, void*, 
> unsigned int) const [with Archive = 
> boost::archive::xml_iarchive, T = demo]'
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/iserializer.hpp:114: error: 
> incomplete 
> type 
> 'boost::serialization::extended_type_info_null<std::map<std::b
> asic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >' used in nested name specifier
> /usr/include/boost/archive/detail/iserializer.hpp: In member function 
> 'bool boost::archive::detail::iserializer<Archive, 
> T>::is_polymorphic() 
> const [with Archive = boost::archive::xml_iarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]':
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/iserializer.hpp:142: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/archive/detail/iserializer.hpp:143: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/archive/detail/oserializer.hpp: In member function 
> 'bool boost::archive::detail::oserializer<Archive, 
> T>::is_polymorphic() 
> const [with Archive = boost::archive::xml_oarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]':
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/oserializer.hpp:131: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/archive/detail/oserializer.hpp:132: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::map<std::ba
> sic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >'
> /usr/include/boost/archive/detail/oserializer.hpp: In constructor 
> 'boost::archive::detail::oserializer<Archive, T>::oserializer() [with 
> Archive = boost::archive::xml_oarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]':
> /usr/include/boost/archive/detail/oserializer.hpp:135: 
> instantiated from 
> 'static boost::archive::detail::oserializer<Archive, T>& 
> boost::archive::detail::oserializer<Archive, T>::instantiate() [with 
> Archive = boost::archive::xml_oarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:264: 
> instantiated from 
> 'static void boost::archive::detail::save_non_pointer_type<Archive, 
> T>::save_standard::invoke(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:322: 
> instantiated from 
> 'static void boost::archive::detail::save_non_pointer_type<Archive, 
> T>::invoke(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:536: 
> instantiated from 
> 'void boost::archive::save(Archive&, const T&) [with Archive = 
> boost::archive::xml_oarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/basic_xml_oarchive.hpp:99: 
> instantiated from 
> 'void 
> boost::archive::basic_xml_oarchive<Archive>::save_override(const 
> boost::serialization::nvp<T>&, int) [with T = const std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > 
>  >, Archive = boost::archive::xml_oarchive]'
> /usr/include/boost/archive/detail/interface_oarchive.hpp:78: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) 
> [with T = const boost::serialization::nvp<const std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  >, Archive = boost::archive::xml_oarchive]'
> /usr/include/boost/serialization/collections_save_imp.hpp:43: 
> instantiated from 'void 
> boost::serialization::stl::save_collection(Archive&, const 
> Container&) 
> [with Archive = boost::archive::xml_oarchive, Container = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/serialization/map.hpp:46: instantiated from 'void 
> boost::serialization::save(Archive&, const std::map<Key, 
> Type, Compare, 
> Allocator>&, unsigned int) [with Archive = 
> boost::archive::xml_oarchive, 
> Type = std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, Key = std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, Compare = 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, Allocator = std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >]'
> /usr/include/boost/serialization/split_free.hpp:45: instantiated from 
> 'static void boost::serialization::free_saver<Archive, 
> T>::invoke(Archive&, const T&, unsigned int) [with Archive = 
> boost::archive::xml_oarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/serialization/split_free.hpp:74: instantiated from 
> 'void boost::serialization::split_free(Archive&, T&, unsigned 
> int) [with 
> Archive = boost::archive::xml_oarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/serialization/map.hpp:78: instantiated from 'void 
> boost::serialization::serialize(Archive&, std::map<Key, Type, 
> Compare, 
> Allocator>&, unsigned int) [with Archive = 
> boost::archive::xml_oarchive, 
> Type = std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, Key = std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, Compare = 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, Allocator = std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >]'
> /usr/include/boost/serialization/serialization.hpp:140: instantiated 
> from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned 
> int) [with Archive = boost::archive::xml_oarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/archive/detail/oserializer.hpp:148: 
> instantiated from 
> 'void boost::archive::detail::oserializer<Archive, 
> T>::save_object_data(boost::archive::detail::basic_oarchive&, const 
> void*) const [with Archive = boost::archive::xml_oarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/oserializer.hpp:107: error: 
> incomplete 
> type 'boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  >' used in nested name specifier
> /usr/include/boost/archive/detail/iserializer.hpp: In constructor 
> 'boost::archive::detail::iserializer<Archive, T>::iserializer() [with 
> Archive = boost::archive::xml_iarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]':
> /usr/include/boost/archive/detail/iserializer.hpp:146: 
> instantiated from 
> 'static boost::archive::detail::iserializer<Archive, T>& 
> boost::archive::detail::iserializer<Archive, T>::instantiate() [with 
> Archive = boost::archive::xml_iarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:375: 
> instantiated from 
> 'static void boost::archive::detail::load_non_pointer_type<Archive, 
> T>::load_standard::invoke(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:425: 
> instantiated from 
> 'static void boost::archive::detail::load_non_pointer_type<Archive, 
> T>::invoke(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T 
> = std::pair<const std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:572: 
> instantiated from 
> 'void boost::archive::load(Archive&, T&) [with Archive = 
> boost::archive::xml_iarchive, T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]'
> /usr/include/boost/archive/basic_xml_iarchive.hpp:80: 
> instantiated from 
> 'void 
> boost::archive::basic_xml_iarchive<Archive>::load_override(const 
> boost::serialization::nvp<T>&, int) [with T = std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > 
>  >, Archive = boost::archive::xml_iarchive]'
> /usr/include/boost/archive/xml_iarchive.hpp:74: instantiated 
> from 'void 
> boost::archive::xml_iarchive_impl<Archive>::load_override(T&, 
> int) [with 
> T = const boost::serialization::nvp<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  >, Archive = boost::archive::xml_iarchive]'
> /usr/include/boost/archive/detail/interface_iarchive.hpp:76: 
> instantiated from 'Archive& 
> boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) 
> [with T = const boost::serialization::nvp<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  >, Archive = boost::archive::xml_iarchive]'
> /usr/include/boost/serialization/collections_load_imp.hpp:66: 
> instantiated from 'void 
> boost::serialization::stl::archive_input_map<Archive, 
> Container>::operator()(Archive&, Container&) [with Archive = 
> boost::archive::xml_iarchive, Container = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/serialization/collections_load_imp.hpp:149: 
> instantiated from 'void 
> boost::serialization::stl::rebuild_collection(Archive&, Container&) 
> [with Archive = boost::archive::xml_iarchive, Container = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >, InputFunction = 
> boost::serialization::stl::archive_input_map<boost::archive::x
> ml_iarchive, 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > > >, R = 
> boost::serialization::stl::no_reserve_imp<std::map<std::basic_
> string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >]'
> /usr/include/boost/serialization/collections_load_imp.hpp:171: 
> instantiated from 'void 
> boost::serialization::stl::load_collection(Archive&, 
> Container&) [with 
> Archive = boost::archive::xml_iarchive, Container = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >, InputFunction = 
> boost::serialization::stl::archive_input_map<boost::archive::x
> ml_iarchive, 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > > >, R = 
> boost::serialization::stl::no_reserve_imp<std::map<std::basic_
> string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > > >]'
> /usr/include/boost/serialization/map.hpp:58: instantiated from 'void 
> boost::serialization::load(Archive&, std::map<Key, Type, Compare, 
> Allocator>&, unsigned int) [with Archive = 
> boost::archive::xml_iarchive, 
> Type = std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, Key = std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, Compare = 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, Allocator = std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >]'
> /usr/include/boost/serialization/split_free.hpp:58: instantiated from 
> 'static void boost::serialization::free_loader<Archive, 
> T>::invoke(Archive&, T&, unsigned int) [with Archive = 
> boost::archive::xml_iarchive, T = std::map<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  > >]'
> /usr/include/boost/serialization/split_free.hpp:74: instantiated from 
> 'void boost::serialization::split_free(Archive&, T&, unsigned 
> int) [with 
> Archive = boost::archive::xml_iarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/serialization/map.hpp:78: instantiated from 'void 
> boost::serialization::serialize(Archive&, std::map<Key, Type, 
> Compare, 
> Allocator>&, unsigned int) [with Archive = 
> boost::archive::xml_iarchive, 
> Type = std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, Key = std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, Compare = 
> std::less<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >, Allocator = std::allocator<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >]'
> /usr/include/boost/serialization/serialization.hpp:140: instantiated 
> from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned 
> int) [with Archive = boost::archive::xml_iarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> /usr/include/boost/archive/detail/iserializer.hpp:160: 
> instantiated from 
> 'void boost::archive::detail::iserializer<Archive, 
> T>::load_object_data(boost::archive::detail::basic_iarchive&, void*, 
> unsigned int) const [with Archive = boost::archive::xml_iarchive, T = 
> std::map<std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, std::basic_string<char, 
> std::char_traits<char>, 
> std::allocator<char> >, std::less<std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > >, 
> std::allocator<std::pair<const std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> >, 
> std::basic_string<char, 
> std::char_traits<char>, std::allocator<char> > > > >]'
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/iserializer.hpp:114: error: 
> incomplete 
> type 'boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > 
>  >' used in nested name specifier
> /usr/include/boost/archive/detail/iserializer.hpp: In member function 
> 'bool boost::archive::detail::iserializer<Archive, 
> T>::is_polymorphic() 
> const [with Archive = boost::archive::xml_iarchive, T = 
> std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]':
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/iserializer.hpp:142: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/archive/detail/iserializer.hpp:143: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/archive/detail/oserializer.hpp: In member function 
> 'bool boost::archive::detail::oserializer<Archive, 
> T>::is_polymorphic() 
> const [with Archive = boost::archive::xml_oarchive, T = 
> std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > >]':
> boost_s_map.cpp:68: instantiated from here
> /usr/include/boost/archive/detail/oserializer.hpp:131: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/archive/detail/oserializer.hpp:132: error: invalid 
> use of undefined type 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> /usr/include/boost/serialization/type_info_implementation.hpp:
> 26: error: 
> declaration of 'struct 
> boost::serialization::extended_type_info_null<std::pair<const 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> >, 
> std::basic_string<char, std::char_traits<char>, 
> std::allocator<char> > > >'
> 
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> http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 

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