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_EXTENT_GEN_HPP
14#define BOOST_MULTI_ARRAY_EXTENT_GEN_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;
32 typedef extent_range<index,size_type> range;
33private:
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
76

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