#define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
#define BOOST_MPL_LIMIT_MAP_SIZE 40

#include <iostream>
#include <boost/mpl/at.hpp>
#include <boost/mpl/map.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/size.hpp>

struct a1_t {};
struct a2_t {};
struct a3_t {};
struct a4_t {};
struct a5_t {};
struct a6_t {};
struct a7_t {};
struct a8_t {};
struct a9_t {};
struct b1_t {};
struct b2_t {};
struct b3_t {};
struct b4_t {};
struct b5_t {};
struct b6_t {};
struct b7_t {};
struct b8_t {};
struct b9_t {};
struct c1_t {};
struct c2_t {};
struct c3_t {};
struct c4_t {};
struct c5_t {};
struct c6_t {};
struct c7_t {};
struct c8_t {};
struct c9_t {};

namespace MPL = boost::mpl;

typedef MPL::map< 
    MPL::pair< a1_t, MPL::int_< 1 > >, 
    MPL::pair< a2_t, MPL::int_< 2 > >,
    MPL::pair< a3_t, MPL::int_< 3 > >, 
    MPL::pair< a4_t, MPL::int_< 4 > >,
    MPL::pair< a5_t, MPL::int_< 5 > >, 
    MPL::pair< a6_t, MPL::int_< 6 > >,
    MPL::pair< a7_t, MPL::int_< 7 > >, 
    MPL::pair< a8_t, MPL::int_< 8 > >,
    MPL::pair< a9_t, MPL::int_< 9 > >,
    MPL::pair< b1_t, MPL::int_< 1 > >, 
    MPL::pair< b2_t, MPL::int_< 2 > >,
    MPL::pair< b3_t, MPL::int_< 3 > >, 
    MPL::pair< b4_t, MPL::int_< 4 > >,
    MPL::pair< b5_t, MPL::int_< 5 > >, 
    MPL::pair< b6_t, MPL::int_< 6 > >,
    MPL::pair< b7_t, MPL::int_< 7 > >, 
    MPL::pair< b8_t, MPL::int_< 8 > >,
    MPL::pair< b9_t, MPL::int_< 9 > >,
    MPL::pair< c1_t, MPL::int_< 1 > >/*, 
    MPL::pair< c2_t, MPL::int_< 2 > >,
    MPL::pair< c3_t, MPL::int_< 3 > >, 
    MPL::pair< c4_t, MPL::int_< 4 > >*/
> type_map;

template < typename T >
void print_type_value()
{
    typedef typename MPL::at< type_map, T >::type int_t;
    std::cout << "-> " << int_t::value << std::endl;
}

int main()
{
    print_type_value< a1_t >();
    print_type_value< a2_t >();
    
    typedef MPL::size< type_map >::type map_size_t;
    std::cout << "MPL map size: " << map_size_t::value << std::endl;
}