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 |
81 | |