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fix recursion depth: find_end

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This commit is contained in:
bolero-MURAKAMI 2012-12-13 13:03:18 +09:00
parent 90890d2336
commit 9b0d1a7933
2 changed files with 59 additions and 12 deletions
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59
sprout/algorithm/find_end.hpp
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@ -5,9 +5,60 @@
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/search.hpp>
#include <sprout/functional/equal_to.hpp>
#include <sprout/detail/algorithm/search_one.hpp>
namespace sprout {
namespace detail {
template<typename RandomAccessIterator1, typename ForwardIterator2, typename BinaryPredicate>
inline SPROUT_CONSTEXPR RandomAccessIterator1
find_end_impl_ra(
RandomAccessIterator1 first1, RandomAccessIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2,
BinaryPredicate pred,
typename std::iterator_traits<RandomAccessIterator1>::difference_type pivot, RandomAccessIterator1 last1_, RandomAccessIterator1 result,
RandomAccessIterator1 searched
)
{
return searched < first1 ? sprout::detail::find_end_impl_ra(
sprout::next(first1, pivot), last1, first2, last2, pred,
(NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) - pivot) / 2, last1_, searched,
sprout::detail::find_end_impl_ra(
first1, sprout::next(first1, pivot), first2, last2, pred,
pivot / 2, last1_, searched,
first1
)
)
: searched == last1_ ? result
: pivot == 0 ? sprout::detail::search_one(first1, last1_, first2, last2, pred)
: sprout::detail::find_end_impl_ra(
sprout::next(first1, pivot), last1, first2, last2, pred,
(NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) - pivot) / 2, last1_, result,
sprout::detail::find_end_impl_ra(
first1, sprout::next(first1, pivot), first2, last2, pred,
pivot / 2, last1_, result,
first1
)
)
;
}
template<typename RandomAccessIterator1, typename ForwardIterator2, typename BinaryPredicate>
inline SPROUT_CONSTEXPR RandomAccessIterator1
find_end(
RandomAccessIterator1 first1, RandomAccessIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2,
BinaryPredicate pred,
std::random_access_iterator_tag*
)
{
return first1 == last1 ? last1
: sprout::detail::find_end_impl_ra(
first1, last1, first2, last2, pred,
NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) / 2, last1, last1,
first1
)
;
}
template<typename ForwardIterator1, typename ForwardIterator2, typename BinaryPredicate>
inline SPROUT_CONSTEXPR ForwardIterator1
find_end_impl(
@ -20,7 +71,7 @@ namespace sprout {
return first1 == last1 ? result
: sprout::detail::find_end_impl(
sprout::search(sprout::next(first1), last1, first2, last2, pred), last1, first2, last2, pred,
first1
first1
)
;
}
@ -62,11 +113,7 @@ namespace sprout {
ForwardIterator2 first2, ForwardIterator2 last2
)
{
return sprout::find_end(
first1, last1,
first2, last2,
sprout::equal_to<>()
);
return sprout::find_end(first1, last1, first2, last2, sprout::equal_to<>());
}
} // namespace sprout