[boost] Archive * This() and the most derived class.

From: George M. Garner Jr. (gmgarner_at_[hidden])
Date: 2005-04-12 07:51:13

Robert,

A comment in interface_oarchive.hpp states that 
interface_oarchive<Archive>::This() is supposed to return the a pointer to 
the most derived class.  Actually, it gives you a pointer to the "Archive" 
template parameter which may or may not be the most derived class, depending 
on how your internal "invoke" plumbing resolves the type.  In the following 
case I was able to get the most derived class only by overriding both 
operator<<(const T & t) and save_override()(using VC2k3):

class fau_xml_woarchive :
public boost::archive::xml_woarchive
{
public:
    [...]
    template<class T>
    void save_override(const ::boost::serialization::nvp<T> & t, int i)
    {
        save_start(t.name());
        boost::archive::save(*this, t.value());
        save_end(t.name());
    }
    template<class T>
    _Mytype& operator<<(const T & t)
    {
        save_override(t, 0);
        return *this;
    }
    [...]
};

Was that your intention?

Regards,

George.