williamr@2: // Copyright 2002 The Trustees of Indiana University.
williamr@2: 
williamr@2: // Use, modification and distribution is subject to the Boost Software 
williamr@2: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@2: //  Boost.MultiArray Library
williamr@2: //  Authors: Ronald Garcia
williamr@2: //           Jeremy Siek
williamr@2: //           Andrew Lumsdaine
williamr@2: //  See http://www.boost.org/libs/multi_array for documentation.
williamr@2: 
williamr@2: #ifndef RANGE_LIST_RG072501_HPP
williamr@2: #define RANGE_LIST_RG072501_HPP
williamr@2: //
williamr@2: // range_list.hpp - helper to build boost::arrays for *_set types
williamr@2: //
williamr@2: 
williamr@2: #include "boost/array.hpp"
williamr@2: 
williamr@2: namespace boost {
williamr@2: namespace detail {
williamr@2: namespace multi_array {
williamr@2: 
williamr@2: /////////////////////////////////////////////////////////////////////////
williamr@2: // choose range list begins
williamr@2: //
williamr@2: 
williamr@2: struct choose_range_list_n {
williamr@2:   template <typename T, std::size_t NumRanges>
williamr@2:   struct bind {
williamr@2:     typedef boost::array<T,NumRanges> type;
williamr@2:   };
williamr@2: };
williamr@2: 
williamr@2: struct choose_range_list_zero {
williamr@2:   template <typename T, std::size_t NumRanges>
williamr@2:   struct bind {
williamr@2:     typedef boost::array<T,1> type;
williamr@2:   };
williamr@2: };
williamr@2: 
williamr@2: 
williamr@2: template <std::size_t NumRanges>
williamr@2: struct range_list_gen_helper {
williamr@2:   typedef choose_range_list_n choice;
williamr@2: };
williamr@2: 
williamr@2: template <>
williamr@2: struct range_list_gen_helper<0> {
williamr@2:   typedef choose_range_list_zero choice;
williamr@2: };
williamr@2: 
williamr@2: template <typename T, std::size_t NumRanges>
williamr@2: struct range_list_generator {
williamr@2: private:
williamr@2:   typedef typename range_list_gen_helper<NumRanges>::choice Choice;
williamr@2: public:
williamr@2:   typedef typename Choice::template bind<T,NumRanges>::type type;
williamr@2: };
williamr@2: 
williamr@2: //
williamr@2: // choose range list ends
williamr@2: /////////////////////////////////////////////////////////////////////////
williamr@2: 
williamr@2: } // namespace multi_array
williamr@2: } // namespace detail
williamr@2: } // namespace boost
williamr@2: 
williamr@2: #endif // RANGE_LIST_RG072501_HPP