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

struct my_func
{
    typedef void result_type;

    void operator() (int& n)
    {
        ++n;
    }
};

int main(int, char*[])
{
    int n = 0;

    my_func f;
    boost::phoenix::bind(f, boost::ref(n))();

    return n;
}