1 // Copyright 2002 The Trustees of Indiana University. 2 3 // Use, modification and distribution is subject to the Boost Software 4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 7 // Boost.MultiArray Library 8 // Authors: Ronald Garcia 9 // Jeremy Siek 10 // Andrew Lumsdaine 11 // See http://www.boost.org/libs/multi_array for documentation. 12 13 #ifndef BOOST_MULTI_ARRAY_EXTENT_GEN_HPP 14 #define BOOST_MULTI_ARRAY_EXTENT_GEN_HPP 15 16 #include "boost/multi_array/extent_range.hpp" 17 #include "boost/multi_array/range_list.hpp" 18 #include "boost/multi_array/types.hpp" 19 #include "boost/array.hpp" 20 #include <algorithm> 21 22 namespace boost { 23 namespace detail { 24 namespace multi_array { 25 26 27 template <std::size_t NumRanges> 28 class extent_gen { 29 public: 30 typedef boost::detail::multi_array::index index; 31 typedef boost::detail::multi_array::size_type size_type; 32 typedef extent_range<index,size_type> range; 33 private: 34 typedef typename range_list_generator<range,NumRanges>::type range_list; 35 public: 36 template <std::size_t Ranges> 37 struct gen_type { 38 typedef extent_gen<Ranges> type; 39 }; 40 41 range_list ranges_; 42 extent_gen()43 extent_gen() { } 44 45 // Used by operator[] to expand extent_gens extent_gen(const extent_gen<NumRanges-1> & rhs,const range & a_range)46 extent_gen(const extent_gen<NumRanges-1>& rhs, 47 const range& a_range) 48 { 49 std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin()); 50 *ranges_.rbegin() = a_range; 51 } 52 53 extent_gen<NumRanges+1> operator [](const range & a_range)54 operator[](const range& a_range) 55 { 56 return extent_gen<NumRanges+1>(*this,a_range); 57 } 58 59 extent_gen<NumRanges+1> operator [](index idx)60 operator[](index idx) 61 { 62 return extent_gen<NumRanges+1>(*this,range(0,idx)); 63 } 64 extents()65 static extent_gen<0> extents() { 66 return extent_gen<0>(); 67 } 68 }; 69 70 } // namespace multi_array 71 } // namespace detail 72 } // namespace boost 73 74 75 #endif 76