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range_return.hpp in vendors/XIOS/current/extern/boost/include/boost/range/detail – NEMO

source: vendors/XIOS/current/extern/boost/include/boost/range/detail/range_return.hpp @ 3408

Last change on this file since 3408 was 3408, checked in by rblod, 12 years ago

importing initial XIOS vendor drop
  • Property svn:keywords set to Id
File size: 6.0 KB
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1//  Copyright Neil Groves 2009. Use, modification and
2//  distribution is subject to the Boost Software License, Version
3//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
4//  http://www.boost.org/LICENSE_1_0.txt)
5//
6//
7// For more information, see http://www.boost.org/libs/range/
8//
9#ifndef BOOST_RANGE_DETAIL_RANGE_RETURN_HPP_INCLUDED
10#define BOOST_RANGE_DETAIL_RANGE_RETURN_HPP_INCLUDED
11
12#include <boost/range/begin.hpp>
13#include <boost/range/end.hpp>
14#include <boost/range/iterator_range.hpp>
15
16namespace boost
17{
18    enum range_return_value
19    {
20        // (*) indicates the most common values
21        return_found,       // only the found resulting iterator (*)
22        return_next,        // next(found) iterator
23        return_prior,       // prior(found) iterator
24        return_begin_found, // [begin, found) range (*)
25        return_begin_next,  // [begin, next(found)) range
26        return_begin_prior, // [begin, prior(found)) range
27        return_found_end,   // [found, end) range (*)
28        return_next_end,    // [next(found), end) range
29        return_prior_end,   // [prior(found), end) range
30        return_begin_end    // [begin, end) range
31    };
32
33    template< class SinglePassRange, range_return_value >
34    struct range_return
35    {
36        typedef boost::iterator_range<
37            BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type > type;
38
39        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type found,
40                         SinglePassRange& rng)
41        {
42            return type(found, boost::end(rng));
43        }
44    };
45
46    template< class SinglePassRange >
47    struct range_return< SinglePassRange, return_found >
48    {
49        typedef BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type type;
50
51        static type pack(type found, SinglePassRange&)
52        {
53            return found;
54        }
55    };
56
57    template< class SinglePassRange >
58    struct range_return< SinglePassRange, return_next >
59    {
60        typedef BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type type;
61
62        static type pack(type found, SinglePassRange& rng)
63        {
64            return found == boost::end(rng)
65                ? found
66                : boost::next(found);
67        }
68    };
69
70    template< class BidirectionalRange >
71    struct range_return< BidirectionalRange, return_prior >
72    {
73        typedef BOOST_DEDUCED_TYPENAME range_iterator<BidirectionalRange>::type type;
74
75        static type pack(type found, BidirectionalRange& rng)
76        {
77            return found == boost::begin(rng)
78                ? found
79                : boost::prior(found);
80        }
81    };
82
83    template< class SinglePassRange >
84    struct range_return< SinglePassRange, return_begin_found >
85    {
86        typedef boost::iterator_range<
87            BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type > type;
88
89        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type found,
90                         SinglePassRange& rng)
91        {
92            return type(boost::begin(rng), found);
93        }
94    };
95
96    template< class SinglePassRange >
97    struct range_return< SinglePassRange, return_begin_next >
98    {
99        typedef boost::iterator_range<
100            BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type > type;
101
102        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type found,
103                         SinglePassRange& rng)
104        {
105            return type( boost::begin(rng), 
106                         found == boost::end(rng) ? found : boost::next(found) );
107        }
108    };
109
110    template< class BidirectionalRange >
111    struct range_return< BidirectionalRange, return_begin_prior >
112    {
113        typedef boost::iterator_range<
114            BOOST_DEDUCED_TYPENAME range_iterator<BidirectionalRange>::type > type;
115
116        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<BidirectionalRange>::type found,
117                         BidirectionalRange& rng)
118        {
119            return type( boost::begin(rng),
120                         found == boost::begin(rng) ? found : boost::prior(found) );
121        }
122    };
123
124    template< class SinglePassRange >
125    struct range_return< SinglePassRange, return_found_end >
126    {
127        typedef boost::iterator_range<
128            BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type > type;
129
130        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type found,
131                         SinglePassRange& rng)
132        {
133            return type(found, boost::end(rng));
134        }
135    };
136
137    template< class SinglePassRange >
138    struct range_return< SinglePassRange, return_next_end >
139    {
140        typedef boost::iterator_range<
141            BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type > type;
142
143        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type found,
144                         SinglePassRange& rng)
145        {
146            return type( found == boost::end(rng) ? found : boost::next(found),
147                         boost::end(rng) );
148        }
149    };
150
151    template< class BidirectionalRange >
152    struct range_return< BidirectionalRange, return_prior_end >
153    {
154        typedef boost::iterator_range<
155            BOOST_DEDUCED_TYPENAME range_iterator<BidirectionalRange>::type > type;
156
157        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<BidirectionalRange>::type found,
158                         BidirectionalRange& rng)
159        {
160            return type( found == boost::begin(rng) ? found : boost::prior(found),
161                         boost::end(rng) );
162        }
163    };
164
165    template< class SinglePassRange >
166    struct range_return< SinglePassRange, return_begin_end >
167    {
168        typedef boost::iterator_range<
169            BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type > type;
170
171        static type pack(BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type found,
172                         SinglePassRange& rng)
173        {
174            return type(boost::begin(rng), boost::end(rng));
175        }
176    };
177
178}
179
180#endif // include guard
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