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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_EXTENT_GEN_RG071801_HPP | |
14 | #define BOOST_EXTENT_GEN_RG071801_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 | ||
43 | extent_gen() { } | |
44 | ||
45 | // Used by operator[] to expand extent_gens | |
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> | |
54 | operator[](const range& a_range) | |
55 | { | |
56 | return extent_gen<NumRanges+1>(*this,a_range); | |
57 | } | |
58 | ||
59 | extent_gen<NumRanges+1> | |
60 | operator[](index idx) | |
61 | { | |
62 | return extent_gen<NumRanges+1>(*this,range(0,idx)); | |
63 | } | |
64 | ||
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 // BOOST_EXTENT_GEN_RG071801_HPP |