How to iterate over archive in boost::serialization - c++

Question

I loaded multiple data into boost::archive::text_oarchive, now I need to extract the data.
But because the archive contains multiple records, I would need an iterator.
something like
//input archive
boost::archive::text_iarchive iarch(ifs);
//read until the end of file
while (!iarch.eof()){
//read current value
iarch >> temp;
...//do something with temp
}
is there any standard way to iterate over elements of the archive?
I found only iarchive.iterator_type, but is it what I need and how do I use it?

Answer 1

The iterator type you are looking at actually comes from
class shared_ptr_helper {
...
typedef std::set<
boost::shared_ptr<const void>,
collection_type_compare
> collection_type;
typedef collection_type::const_iterator iterator_type;
which is used during the load of the archive rather than being an iterator for external use I think.
If you look at the link http://www.boost.org/doc/libs/1_53_0/libs/serialization/doc/index.html under tutorial -> STL Collection you will see the following example:
#include <boost/serialization/list.hpp>
class bus_route
{
friend class boost::serialization::access;
std::list<bus_stop *> stops;
template<class Archive>
void serialize(Archive & ar, const unsigned int version)
{
ar & stops;
}
public:
bus_route(){}
};
If that isn't quite what you need then you would probably need to look at overriding load and save as per http://www.boost.org/doc/libs/1_53_0/libs/serialization/doc/tutorial.html#splitting
and adding handling as required.