[Boost-users] [serialization] Cannot serialize multimap.

Hi. I have a multimap where A and B are not default constructible. I provided load_construct_data and save_construct_data for both, but the library doesn't allow me to serialize this multimap. It fails at compile time: It seems to be the library trying to use default constructors. Does anyone know any way or a workaround or whatever to make this compile correctly? Thanks in advance.