Re: [Boost-users] serialization and object tracking question...

From: Graham Reitz (graham.cpp_at_[hidden])
Date: 2007-10-07 22:01:34

Ok I am confused (again)

I changed it to the non-intrusive mode:

namespace boost {
namespace serialization {
template<class Archive>
void serialize(Archive & ar, clients & c, const unsigned int version)
{
    ar & c.client_first_name;  // all std::string
    ar & c.client_middle_initial;
    ar & c.client_last_name;
    ar & c.client_street_address;
}

} // namespace serialization
} // namespace boost

With:
BOOST_CLASS_TRACKING(clients, boost::serialization::track_never)
I receive this error:
boost/serialization/access.hpp:109: error: 'struct clients' has no
member named 'serialize'

Without:
//BOOST_CLASS_TRACKING(clients, boost::serialization::track_never)
I receive this error:
boost/archive/detail/oserializer.hpp:566: error: invalid application
of 'sizeof' to incomplete type
'boost::STATIC_ASSERTION_FAILURE<false>'

Which is what I started with.
What am I missing?

Thanks for any help,
Graham

On 10/7/07, Graham Reitz <graham.cpp_at_[hidden]> wrote:
> I think the issue is that the structure clients used in class client_i
> as m_client doesn't have any information on how do serialize itself.
>
> I don't have control over the clients structure, as it is created for
> me by the mysql++ macro.  It is a simple structure with public access
> to its internals which are primitives.
>
> Just use the non-intrusive serialization method?  Or is there a more
> convenient method?
>
> Thanks,
> Graham
>
> On 10/7/07, Graham Reitz <graham.cpp_at_[hidden]> wrote:
> > I am having trouble wrapping my head around object tracking for serialization.
> >
> > I see how to change the default behavior:
> > BOOST_CLASS_TRACKING(my_class, boost::serialization::track_never)
> >
> > ...but based on the error below how do I determine what kind of object
> > tracking is needed?
> >
> > oserializer.hpp:566: error: invalid application of 'sizeof' to
> > incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>'
> >
> > inline void save(Archive & ar, T &t){
> >     // if your program traps here, it indicates taht your doing one of
> > the following:
> >     // a) serializing an object of a type marked "track_never" through
> > a pointer.
> >     // b) saving an non-const object of a type not markd "track_never)
> >     // Either of these conditions may be an indicator of an error usage of the
> >     // serialization library and should be double checked.  See documentation on
> >     // object tracking.
> >     BOOST_STATIC_ASSERT(check_tracking<T>::value);
> >
> > The following is the class to be serialized:
> >
> > class client_i
> > {
> > private:
> >     friend class boost::serialization::access;
> >
> >     template<class Archive>
> >     void serialize(Archive & ar, const unsigned int version)
> >     { ar & m_client; }
> >
> >     clients m_client;
> > public:
> >
> >     client_i() {};
> >     client_i(clients c) : m_client(c) {};
> >     ~client_i() {};
> > };
> >
> > clients is a mysql++ specialized sql structure that is created via one
> > of the mysql++ macros, i.e. sql_create_N().
> >
> > Any help understanding this would be greatly appreciated.
> >
> > Thanks,
> >
> > Graham
> >
>