[Boost-users] [Serialization]Serialization of nested stl object

Hi, all A member of a target class, where one STL object (map) includes another (set), prevent the code from being built properly and the error message urges me to implement *serialize* method for pair. What is the typical way of implementing serialization using boost for this kind of data structures? * Code snippet class B { … map lines; .. template<class Archive> void serialize (Archive & ar, const unsigned int version) { ar & lines; … * Build error message /opt/local/include/boost/serialization/access.hpp:118: error: ‘class std::map, std::less, std::allocator > > >’ has no member named ‘serialize’ Thanks for your help in advance, /Kangkook