// Copyright 2002 The Trustees of Indiana University.

// Use, modification and distribution is subject to the Boost Software 

// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

//  Boost.MultiArray Library

//  Authors: Ronald Garcia

//           Jeremy Siek

//           Andrew Lumsdaine

//  See http://www.boost.org/libs/multi_array for documentation.

#ifndef RANGE_LIST_RG072501_HPP

#define RANGE_LIST_RG072501_HPP

//

// range_list.hpp - helper to build boost::arrays for *_set types

//

#include "boost/array.hpp"

namespace boost {

namespace detail {

namespace multi_array {

/////////////////////////////////////////////////////////////////////////

// choose range list begins

//

struct choose_range_list_n {

  template <typename T, std::size_t NumRanges>

  struct bind {

    typedef boost::array<T,NumRanges> type;

  };

};

struct choose_range_list_zero {

  template <typename T, std::size_t NumRanges>

  struct bind {

    typedef boost::array<T,1> type;

  };

};

template <std::size_t NumRanges>

struct range_list_gen_helper {

  typedef choose_range_list_n choice;

};

template <>

struct range_list_gen_helper<0> {

  typedef choose_range_list_zero choice;

};

template <typename T, std::size_t NumRanges>

struct range_list_generator {

private:

  typedef typename range_list_gen_helper<NumRanges>::choice Choice;

public:

  typedef typename Choice::template bind<T,NumRanges>::type type;

};

//

// choose range list ends

/////////////////////////////////////////////////////////////////////////

} // namespace multi_array

} // namespace detail

} // namespace boost

#endif // RANGE_LIST_RG072501_HPP