Sprout/sprout/algorithm/search_n.hpp
2013-02-23 15:21:27 +09:00

36 lines
1.2 KiB
C++

#ifndef SPROUT_ALGORITHM_SEARCH_N_HPP
#define SPROUT_ALGORITHM_SEARCH_N_HPP
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/iterator/value_iterator.hpp>
#include <sprout/functional/equal_to.hpp>
#include <sprout/algorithm/search.hpp>
namespace sprout {
// 25.2.13 Search
//
// recursion depth:
// O(log(N1+N2))
//
template<typename ForwardIterator, typename Size, typename T, typename BinaryPredicate>
inline SPROUT_CONSTEXPR ForwardIterator
search_n(ForwardIterator first, ForwardIterator last, Size count, T const& value, BinaryPredicate pred) {
typedef sprout::value_iterator<T const&> iterator;
typedef typename std::iterator_traits<iterator>::difference_type difference_type;
return sprout::search(
first, last,
iterator(value, static_cast<difference_type>(count)), iterator(value, 0),
pred
);
}
template<typename ForwardIterator, typename Size, typename T>
inline SPROUT_CONSTEXPR ForwardIterator
search_n(ForwardIterator first, ForwardIterator last, Size count, T const& value) {
return sprout::search_n(first, last, count, value, sprout::equal_to<>());
}
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_SEARCH_N_HPP