source: NonGTP/Boost/boost/multi_array/index_gen.hpp @ 857

Revision 857, 2.2 KB checked in by igarcia, 19 years ago (diff)
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[857]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
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 std::size_t SizeType;
33  typedef index_range<Index,SizeType> 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 index_range<Index,SizeType>& range)
48  {
49    std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin());
50    *ranges_.rbegin() = range;
51  }
52
53  index_gen<NumRanges+1,NumDims+1>
54  operator[](const index_range<Index,SizeType>& range) const
55  {
56    index_gen<NumRanges+1,NumDims+1> tmp;
57    std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
58    *tmp.ranges_.rbegin() = range;
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() = index_range<Index,SizeType>(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
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