[Boost-users] [serialization] Issues with/questions about polymorphic archives

From: Anis (mighty_ernie_at_[hidden])
Date: 2008-05-22 02:28:27

I'm seeing the following error when trying to serialize from a 
polymorphic_iarchive.  I'm new to boost::serialization, so I was hoping 
somebody could shed some light on what I was doing wrong?  I tried googling 
and searching the archives, but didn't find anything yet.

error C2678: binary '>>' : no operator found which takes a left-hand operand 
of type 'const boost::archive::polymorphic_iarchive' (or there is no 
acceptable conversion)
c:\boost\include\boost-1_35\boost\archive\detail\interface_iarchive.hpp(62): 
could be 'Archive 
&boost::archive::detail::interface_iarchive<Archive>::operator >><const 
boost::serialization::nvp<T>>(const boost::serialization::nvp<T> &)'

The code in question is essentially:
    virtual void foo(const boost::archive::polymorphic_iarchive& ar)
    {
        ar >> boost::serialization::make_nvp("typeName", *typePtr);
        ...
    }

Also, it appears as though get_library_version() is private for 
polymorphic_iarchive_dispatch.  I'm confused, isn't it public elsewhere?  I 
was hoping to have access to it.  I reckon there's a reason behind this, so 
I'm just curious as to why it's private.

Thanks!