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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_INDEX_GEN_RG071801_HPP | |
14 | #define BOOST_INDEX_GEN_RG071801_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 | ||
23 | namespace boost { | |
24 | namespace detail { | |
25 | namespace multi_array { | |
26 | ||
27 | ||
28 | template <int NumRanges, int NumDims> | |
29 | struct index_gen { | |
30 | private: | |
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; | |
34 | public: | |
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 // BOOST_INDEX_GEN_RG071801_HPP |