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

Revision 857, 1.9 KB checked in by igarcia, 19 years ago (diff)
Line 
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
22namespace boost {
23namespace detail {
24namespace multi_array {
25
26
27template <std::size_t NumRanges>
28class extent_gen {
29public:
30  typedef boost::detail::multi_array::index index;
31  typedef boost::detail::multi_array::size_type size_type;
32private:
33  typedef extent_range<index,size_type> range;
34  typedef typename range_list_generator<range,NumRanges>::type range_list;
35public:
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
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