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_BINARY_SEARCH_HPP_INCLUDED
10 #define BOOST_RANGE_ALGORITHM_BINARY_SEARCH_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 binary_search
24 ///
25 /// range-based version of the binary_search std algorithm
26 ///
27 /// \pre ForwardRange is a model of the ForwardRangeConcept
28 /// \pre BinaryPredicate is a model of the BinaryPredicateConcept
29 template<class ForwardRange, class Value>
binary_search(const ForwardRange & rng,const Value & val)30 inline bool binary_search(const ForwardRange& rng, const Value& val)
31 {
32 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
33 return std::binary_search(boost::begin(rng), boost::end(rng), val);
34 }
35
36 /// \overload
37 template<class ForwardRange, class Value, class BinaryPredicate>
binary_search(const ForwardRange & rng,const Value & val,BinaryPredicate pred)38 inline bool binary_search(const ForwardRange& rng, const Value& val,
39 BinaryPredicate pred)
40 {
41 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
42 return std::binary_search(boost::begin(rng), boost::end(rng), val, pred);
43 }
44
45 } // namespace range
46 using range::binary_search;
47 } // namespace boost
48
49 #endif // include guard
50