| // Copyright Neil Groves 2009. Use, modification and |
| // distribution is subject to the Boost Software License, Version |
| // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // |
| // For more information, see http://www.boost.org/libs/range/ |
| // |
| #ifndef BOOST_RANGE_ALGORITHM_EXT_IS_SORTED_HPP_INCLUDED |
| #define BOOST_RANGE_ALGORITHM_EXT_IS_SORTED_HPP_INCLUDED |
| |
| #include <boost/concept_check.hpp> |
| #include <boost/range/begin.hpp> |
| #include <boost/range/end.hpp> |
| #include <boost/range/concepts.hpp> |
| #include <boost/range/value_type.hpp> |
| #include <algorithm> |
| |
| namespace boost |
| { |
| namespace range_detail |
| { |
| template<class ForwardIterator> |
| inline bool is_sorted(ForwardIterator first, ForwardIterator last) |
| { |
| for (ForwardIterator next = first; first != last && ++next != last; ++first) |
| if (*next < *first) |
| return false; |
| return true; |
| } |
| |
| template<class ForwardIterator, class BinaryPredicate> |
| inline bool is_sorted(ForwardIterator first, ForwardIterator last, BinaryPredicate pred) |
| { |
| for (ForwardIterator next = first; first != last && ++next != last; ++first) |
| if (pred(*next, *first)) |
| return false; |
| return true; |
| } |
| } |
| |
| namespace range |
| { |
| |
| /// \brief template function count |
| /// |
| /// range-based version of the count std algorithm |
| /// |
| /// \pre SinglePassRange is a model of the SinglePassRangeConcept |
| template<class SinglePassRange> |
| inline bool is_sorted(const SinglePassRange& rng) |
| { |
| BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const SinglePassRange>)); |
| BOOST_RANGE_CONCEPT_ASSERT((LessThanComparableConcept<BOOST_DEDUCED_TYPENAME range_value<const SinglePassRange>::type>)); |
| return range_detail::is_sorted(boost::begin(rng), boost::end(rng)); |
| } |
| |
| /// \overload |
| template<class SinglePassRange, class BinaryPredicate> |
| inline bool is_sorted(const SinglePassRange& rng, BinaryPredicate pred) |
| { |
| BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const SinglePassRange>)); |
| BOOST_RANGE_CONCEPT_ASSERT((BinaryPredicateConcept<BinaryPredicate, BOOST_DEDUCED_TYPENAME range_value<const SinglePassRange>::type, BOOST_DEDUCED_TYPENAME range_value<const SinglePassRange>::type>)); |
| return range_detail::is_sorted(boost::begin(rng), boost::end(rng), pred); |
| } |
| |
| } // namespace range |
| using range::is_sorted; |
| } // namespace boost |
| |
| #endif // include guard |