Chris@16: // Copyright 2002 The Trustees of Indiana University.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software 
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  Boost.MultiArray Library
Chris@16: //  Authors: Ronald Garcia
Chris@16: //           Jeremy Siek
Chris@16: //           Andrew Lumsdaine
Chris@16: //  See http://www.boost.org/libs/multi_array for documentation.
Chris@16: 
Chris@16: #ifndef BOOST_EXTENT_GEN_RG071801_HPP
Chris@16: #define BOOST_EXTENT_GEN_RG071801_HPP
Chris@16: 
Chris@16: #include "boost/multi_array/extent_range.hpp"
Chris@16: #include "boost/multi_array/range_list.hpp"
Chris@16: #include "boost/multi_array/types.hpp"
Chris@16: #include "boost/array.hpp"
Chris@16: #include <algorithm>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace detail {
Chris@16: namespace multi_array {
Chris@16: 
Chris@16: 
Chris@16: template <std::size_t NumRanges>
Chris@16: class extent_gen {
Chris@16: public:
Chris@16:   typedef boost::detail::multi_array::index index;
Chris@16:   typedef boost::detail::multi_array::size_type size_type;
Chris@16:   typedef extent_range<index,size_type> range;
Chris@16: private:
Chris@16:   typedef typename range_list_generator<range,NumRanges>::type range_list;
Chris@16: public:
Chris@16:   template <std::size_t Ranges>
Chris@16:   struct gen_type {
Chris@16:     typedef extent_gen<Ranges> type;
Chris@16:   };
Chris@16: 
Chris@16:   range_list ranges_;
Chris@16: 
Chris@16:   extent_gen() { }
Chris@16: 
Chris@16:   // Used by operator[] to expand extent_gens
Chris@16:   extent_gen(const extent_gen<NumRanges-1>& rhs,
Chris@16:             const range& a_range)
Chris@16:   {
Chris@16:     std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin());
Chris@16:     *ranges_.rbegin() = a_range;
Chris@16:   }
Chris@16: 
Chris@16:   extent_gen<NumRanges+1>
Chris@16:   operator[](const range& a_range)
Chris@16:   {
Chris@16:     return extent_gen<NumRanges+1>(*this,a_range);    
Chris@16:   }
Chris@16: 
Chris@16:   extent_gen<NumRanges+1>
Chris@16:   operator[](index idx)
Chris@16:   {
Chris@16:     return extent_gen<NumRanges+1>(*this,range(0,idx));    
Chris@16:   }    
Chris@16: 
Chris@16:   static extent_gen<0> extents() {
Chris@16:     return extent_gen<0>();
Chris@16:   }
Chris@16: };
Chris@16: 
Chris@16: } // namespace multi_array
Chris@16: } // namespace detail
Chris@16: } // namespace boost
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_EXTENT_GEN_RG071801_HPP