#include "boost/mpl/vector.hpp"
#include "boost/mpl/range_c.hpp"
#include "boost/mpl/zip_view.hpp"
#include "boost/mpl/identity.hpp"
#include "boost/mpl/for_each.hpp"
#include <boost/mpl/list.hpp>
#include "boost/mpl/size.hpp"
#include "boost/mpl/int.hpp"
#include "boost/mpl/at.hpp"

//#include <iostream>


namespace mpl = boost::mpl ;
using mpl::_ ;


struct Array_Item
{
  int a ;
  int b ;

  void set( int a_param, int b_param )
  {
    a = a_param ;
    b = b_param ;
  }
} ;


struct Initializer
{
  Initializer( Array_Item *item ) : array_( item ) { }
  template < typename U > void operator()( mpl::identity< U > )
  {
    array_[mpl::at_c< U, 0 >::type::value].
      set( mpl::at_c< U, 1>::type::a_param, 
	   mpl::at_c< U, 1>::type::b_param ) ;
  }
  
  Array_Item *array_ ;
} ;


template < typename Descriptor_List_ >
struct Holder
{
  typedef Descriptor_List_ Descriptor_List ;

  static void setup( void )
  {
    static Array_Item array_[mpl::size< Descriptor_List >::type::value] ;

    typedef mpl::zip_view < mpl::vector2 < mpl::range_c< int, 0, mpl::size<Descriptor_List >::value >, Descriptor_List > > My_View ;
    

    mpl::for_each< My_View, mpl::make_identity<_> >( Initializer( array_ ) ) ;

    //std::cout << array_[0].a << ", " << array_[0].b << std::endl ;
    //std::cout << array_[1].a << ", " << array_[1].b << std::endl ;
  }
} ;


#if 0
template < typename Descriptor_List_ >
void
Holder< Descriptor_List_ >::setup( void )
{
  static Array_Item array_[mpl::size< Descriptor_List >::type::value] ;  

  typedef mpl::zip_view < mpl::vector2 < mpl::range_c< int, 0, mpl::size<Descriptor_List >::value >
    , Descriptor_List
    >
    > My_View ;


  mpl::for_each< My_View, mpl::make_identity<_> >( Initializer( array_ ) ) ;

//std::cout << array_[0].a << ", " << array_[0].b << std::endl ;
//std::cout << array_[1].a << ", " << array_[1].b << std::endl ;
}
#endif


struct First_Descriptor
{
  static const int a_param = 46 ;
  static const int b_param = 23 ;
}  ;


struct Second_Descriptor
{
  static const int a_param = 2567 ;
  static const int b_param = -42 ;
} ;


typedef mpl::list< First_Descriptor, Second_Descriptor > Descriptors ;


int
main()
{
  //  for ( int i = 0; i < 1000000000; ++i )
  //    {
      Holder< Descriptors >::setup() ;
      //    }

  return 0 ;
}