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_EQUAL_RANGE_HPP_INCLUDED
10 #define BOOST_RANGE_ALGORITHM_EQUAL_RANGE_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 <algorithm>
17
18 namespace boost
19 {
20 namespace range
21 {
22
23 /// \brief template function equal_range
24 ///
25 /// range-based version of the equal_range std algorithm
26 ///
27 /// \pre ForwardRange is a model of the ForwardRangeConcept
28 /// \pre SortPredicate is a model of the BinaryPredicateConcept
29 template<class ForwardRange, class Value>
30 inline std::pair<
31 BOOST_DEDUCED_TYPENAME boost::range_iterator<ForwardRange>::type,
32 BOOST_DEDUCED_TYPENAME boost::range_iterator<ForwardRange>::type
33 >
equal_range(ForwardRange & rng,const Value & val)34 equal_range(ForwardRange& rng, const Value& val)
35 {
36 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
37 return std::equal_range(boost::begin(rng), boost::end(rng), val);
38 }
39
40 /// \overload
41 template<class ForwardRange, class Value>
42 inline std::pair<
43 BOOST_DEDUCED_TYPENAME boost::range_iterator<const ForwardRange>::type,
44 BOOST_DEDUCED_TYPENAME boost::range_iterator<const ForwardRange>::type
45 >
equal_range(const ForwardRange & rng,const Value & val)46 equal_range(const ForwardRange& rng, const Value& val)
47 {
48 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
49 return std::equal_range(boost::begin(rng), boost::end(rng), val);
50 }
51
52 /// \overload
53 template<class ForwardRange, class Value, class SortPredicate>
54 inline std::pair<
55 BOOST_DEDUCED_TYPENAME boost::range_iterator<ForwardRange>::type,
56 BOOST_DEDUCED_TYPENAME boost::range_iterator<ForwardRange>::type
57 >
equal_range(ForwardRange & rng,const Value & val,SortPredicate pred)58 equal_range(ForwardRange& rng, const Value& val, SortPredicate pred)
59 {
60 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
61 return std::equal_range(boost::begin(rng), boost::end(rng), val, pred);
62 }
63
64 /// \overload
65 template<class ForwardRange, class Value, class SortPredicate>
66 inline std::pair<
67 BOOST_DEDUCED_TYPENAME boost::range_iterator<const ForwardRange>::type,
68 BOOST_DEDUCED_TYPENAME boost::range_iterator<const ForwardRange>::type
69 >
equal_range(const ForwardRange & rng,const Value & val,SortPredicate pred)70 equal_range(const ForwardRange& rng, const Value& val, SortPredicate pred)
71 {
72 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
73 return std::equal_range(boost::begin(rng), boost::end(rng), val, pred);
74 }
75
76 } // namespace range
77 using range::equal_range;
78 } // namespace boost
79
80 #endif // include guard
81