Ticket #11829: mwe.cpp

#include <sstream>
#include <boost/serialization/map.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>

std::ostream& operator<<(std::ostream& out, const std::multimap<int, double> &o)
{
        for (auto &i : o)
                out << "(" << i.first << ", " << i.second << ")\n";

        return out;
}

int main()
{
        std::multimap<int, double> o;
        o.insert(std::make_pair(1, 1.1));
        o.insert(std::make_pair(1, 1.2));
        o.insert(std::make_pair(2, 2.1));
        o.insert(std::make_pair(2, 2.2));

        std::stringstream sstr;
        boost::archive::text_oarchive(sstr) << o;
        std::cout << o << std::endl;

        std::cout << sstr.str() << std::endl;

        std::multimap<int, double> i;
        boost::archive::text_iarchive(sstr) >> i;
        std::cout << i << std::endl;
}