at_c test

at_c.cc

#include <boost/phoenix.hpp>
#include <boost/fusion/adapted.hpp>

#include <iostream>

struct S
{
    int a0, a1, a2, a3, a4, a5, a6, a7; 
};

BOOST_FUSION_ADAPT_STRUCT(S,
    (int, a0) 
    (int, a1) 
    (int, a2) 
    (int, a3) 
    (int, a4) 
    (int, a5) 
    (int, a6) 
    (int, a7))

int main()
{
    S s = { 40, 41, 42, 43, 44, 45, 46, 47 };
    std::cerr << boost::phoenix::at_c<7>(s)() << std::endl;
}