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_INDEX_GEN_HPP
14#define BOOST_MULTI_ARRAY_INDEX_GEN_HPP
15
16#include "boost/array.hpp"
17#include "boost/multi_array/index_range.hpp"
18#include "boost/multi_array/range_list.hpp"
19#include "boost/multi_array/types.hpp"
20#include <algorithm>
21#include <cstddef>
22
23namespace boost {
24namespace detail {
25namespace multi_array {
26
27
28template <int NumRanges, int NumDims>
29struct index_gen {
30private:
31 typedef ::boost::detail::multi_array::index index;
32 typedef ::boost::detail::multi_array::size_type size_type;
33 typedef index_range<index,size_type> range;
34public:
35 template <int Dims, int Ranges>
36 struct gen_type {
37 typedef index_gen<Ranges,Dims> type;
38 };
39
40 typedef typename range_list_generator<range,NumRanges>::type range_list;
41 range_list ranges_;
42
43 index_gen() { }
44
45 template <int ND>
46 explicit index_gen(const index_gen<NumRanges-1,ND>& rhs,
47 const range& r)
48 {
49 std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin());
50 *ranges_.rbegin() = r;
51 }
52
53 index_gen<NumRanges+1,NumDims+1>
54 operator[](const range& r) const
55 {
56 index_gen<NumRanges+1,NumDims+1> tmp;
57 std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
58 *tmp.ranges_.rbegin() = r;
59 return tmp;
60 }
61
62 index_gen<NumRanges+1,NumDims>
63 operator[](index idx) const
64 {
65 index_gen<NumRanges+1,NumDims> tmp;
66 std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
67 *tmp.ranges_.rbegin() = range(idx);
68 return tmp;
69 }
70
71 static index_gen<0,0> indices() {
72 return index_gen<0,0>();
73 }
74};
75
76} // namespace multi_array
77} // namespace detail
78} // namespace boost
79
80
81#endif
82

source code of include/boost/multi_array/index_gen.hpp