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_INDEX_GEN_RG071801_HPP
Chris@16: #define BOOST_INDEX_GEN_RG071801_HPP
Chris@16: 
Chris@16: #include "boost/array.hpp"
Chris@16: #include "boost/multi_array/index_range.hpp"
Chris@16: #include "boost/multi_array/range_list.hpp"
Chris@16: #include "boost/multi_array/types.hpp"
Chris@16: #include <algorithm> 
Chris@16: #include <cstddef>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace detail {
Chris@16: namespace multi_array {
Chris@16: 
Chris@16: 
Chris@16: template <int NumRanges, int NumDims>
Chris@16: struct index_gen {
Chris@16: private:
Chris@16:   typedef ::boost::detail::multi_array::index index;
Chris@16:   typedef ::boost::detail::multi_array::size_type size_type;
Chris@16:   typedef index_range<index,size_type> range;
Chris@16: public:
Chris@16:   template <int Dims, int Ranges>
Chris@16:   struct gen_type {
Chris@16:     typedef index_gen<Ranges,Dims> type;
Chris@16:   };
Chris@16: 
Chris@16:   typedef typename range_list_generator<range,NumRanges>::type range_list;
Chris@16:   range_list ranges_;
Chris@16: 
Chris@16:   index_gen() { }
Chris@16: 
Chris@16:   template <int ND>
Chris@16:   explicit index_gen(const index_gen<NumRanges-1,ND>& rhs,
Chris@16:             const range& r)
Chris@16:   {
Chris@16:     std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin());
Chris@16:     *ranges_.rbegin() = r;
Chris@16:   }
Chris@16: 
Chris@16:   index_gen<NumRanges+1,NumDims+1>
Chris@16:   operator[](const range& r) const
Chris@16:   {
Chris@16:     index_gen<NumRanges+1,NumDims+1> tmp;
Chris@16:     std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
Chris@16:     *tmp.ranges_.rbegin() = r;
Chris@16:     return tmp;
Chris@16:   }
Chris@16: 
Chris@16:   index_gen<NumRanges+1,NumDims>
Chris@16:   operator[](index idx) const
Chris@16:   {
Chris@16:     index_gen<NumRanges+1,NumDims> tmp;
Chris@16:     std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
Chris@16:     *tmp.ranges_.rbegin() = range(idx);
Chris@16:     return tmp;
Chris@16:   }    
Chris@16: 
Chris@16:   static index_gen<0,0> indices() {
Chris@16:     return index_gen<0,0>();
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_INDEX_GEN_RG071801_HPP