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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_ALGORITHM_FIND_HPP_INCLUDED | |
10 | #define BOOST_RANGE_ALGORITHM_FIND_HPP_INCLUDED | |
11 | ||
12 | #include <boost/concept_check.hpp> | |
13 | #include <boost/range/begin.hpp> | |
14 | #include <boost/range/end.hpp> | |
15 | #include <boost/range/concepts.hpp> | |
16 | #include <boost/range/detail/range_return.hpp> | |
17 | #include <algorithm> | |
18 | ||
19 | namespace boost | |
20 | { | |
21 | namespace range | |
22 | { | |
23 | ||
24 | /// \brief template function find | |
25 | /// | |
26 | /// range-based version of the find std algorithm | |
27 | /// | |
28 | /// \pre SinglePassRange is a model of the SinglePassRangeConcept | |
29 | template< class SinglePassRange, class Value > | |
30 | inline BOOST_DEDUCED_TYPENAME disable_if< | |
31 | is_const<SinglePassRange>, | |
32 | BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type | |
33 | >::type | |
34 | find( SinglePassRange& rng, const Value& val ) | |
35 | { | |
36 | BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> )); | |
37 | return std::find(boost::begin(rng), boost::end(rng), val); | |
38 | } | |
39 | ||
40 | /// \overload | |
41 | template< class SinglePassRange, class Value > | |
42 | inline BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange>::type | |
43 | find( const SinglePassRange& rng, const Value& val ) | |
44 | { | |
45 | BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> )); | |
46 | return std::find(boost::begin(rng), boost::end(rng), val); | |
47 | } | |
48 | ||
49 | // range_return overloads | |
50 | ||
51 | /// \overload | |
52 | template< range_return_value re, class SinglePassRange, class Value > | |
53 | inline BOOST_DEDUCED_TYPENAME disable_if< | |
54 | is_const<SinglePassRange>, | |
55 | BOOST_DEDUCED_TYPENAME range_return<SinglePassRange,re>::type | |
56 | >::type | |
57 | find( SinglePassRange& rng, const Value& val ) | |
58 | { | |
59 | BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> )); | |
60 | return range_return<SinglePassRange,re>:: | |
61 | pack(std::find(boost::begin(rng), boost::end(rng), val), | |
62 | rng); | |
63 | } | |
64 | ||
65 | /// \overload | |
66 | template< range_return_value re, class SinglePassRange, class Value > | |
67 | inline BOOST_DEDUCED_TYPENAME range_return<const SinglePassRange,re>::type | |
68 | find( const SinglePassRange& rng, const Value& val ) | |
69 | { | |
70 | BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> )); | |
71 | return range_return<const SinglePassRange,re>:: | |
72 | pack(std::find(boost::begin(rng), boost::end(rng), val), | |
73 | rng); | |
74 | } | |
75 | ||
76 | } // namespace range | |
77 | using range::find; | |
78 | } | |
79 | ||
80 | #endif // include guard |