#include <boost/function.hpp>
#include <boost/ref.hpp>

#include <iostream>

struct Myfun
{
    void operator()(void) {}
};

int main(int argc, char *argv[])
{
    Myfun f;

    boost::function<void (void)> f1(boost::ref(f));
    boost::function<void (void)> f2 = f1;

    std::cout << f2.target<Myfun>() << std::endl;

    return 0;
}