range/algorithm/binary_search.hpp

0001 //  Copyright Neil Groves 2009. Use, modification and
0002 //  distribution is subject to the Boost Software License, Version
0003 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0004 //  http://www.boost.org/LICENSE_1_0.txt)
0005 //
0006 //
0007 // For more information, see http://www.boost.org/libs/range/
0008 //
0009 #ifndef BOOST_RANGE_ALGORITHM_BINARY_SEARCH_HPP_INCLUDED
0010 #define BOOST_RANGE_ALGORITHM_BINARY_SEARCH_HPP_INCLUDED
0011
0012 #include <boost/concept_check.hpp>
0013 #include <boost/range/begin.hpp>
0014 #include <boost/range/end.hpp>
0015 #include <boost/range/concepts.hpp>
0016 #include <algorithm>
0017
0018 namespace boost
0019 {
0020     namespace range
0021     {
0022
0023 /// \brief template function binary_search
0024 ///
0025 /// range-based version of the binary_search std algorithm
0026 ///
0027 /// \pre ForwardRange is a model of the ForwardRangeConcept
0028 /// \pre BinaryPredicate is a model of the BinaryPredicateConcept
0029 template<class ForwardRange, class Value>
0030 inline bool binary_search(const ForwardRange& rng, const Value& val)
0031 {
0032     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
0033     return std::binary_search(boost::begin(rng), boost::end(rng), val);
0034 }
0035
0036 /// \overload
0037 template<class ForwardRange, class Value, class BinaryPredicate>
0038 inline bool binary_search(const ForwardRange& rng, const Value& val,
0039                           BinaryPredicate pred)
0040 {
0041     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
0042     return std::binary_search(boost::begin(rng), boost::end(rng), val, pred);
0043 }
0044
0045     } // namespace range
0046     using range::binary_search;
0047 } // namespace boost
0048
0049 #endif // include guard