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fix recursion depth: count, count_if, mismatch, equal, is_permutation

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bolero-MURAKAMI 2012-12-12 01:47:14 +09:00
parent b5bdde21c4
commit 75228465fe
14 changed files with 716 additions and 87 deletions
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56
sprout/algorithm/count_if.hpp
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@ -4,17 +4,65 @@
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/iterator/operation.hpp>
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
namespace sprout {
// Copyright (C) 2011 RiSK (sscrisk)
namespace detail {
template<typename RandomAccessIterator, typename Predicate>
inline SPROUT_CONSTEXPR typename std::iterator_traits<RandomAccessIterator>::difference_type
count_if_impl_ra(
RandomAccessIterator first, RandomAccessIterator last, Predicate pred,
typename std::iterator_traits<RandomAccessIterator>::difference_type pivot
)
{
return pivot == 0 ? (pred(*first) ? 1 : 0)
: sprout::detail::count_if_impl_ra(
first, sprout::next(first, pivot), pred,
pivot / 2
)
+ sprout::detail::count_if_impl_ra(
sprout::next(first, pivot), last, pred,
(NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) - pivot) / 2
)
;
}
template<typename RandomAccessIterator, typename Predicate>
inline SPROUT_CONSTEXPR typename std::iterator_traits<RandomAccessIterator>::difference_type
count_if(
RandomAccessIterator first, RandomAccessIterator last, Predicate pred,
std::random_access_iterator_tag*
)
{
return first == last ? 0
: sprout::detail::count_if_impl_ra(first, last, pred, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2)
;
}
// Copyright (C) 2011 RiSK (sscrisk)
template<typename InputIterator, typename Predicate>
inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator>::difference_type
count_if_impl(InputIterator first, InputIterator last, Predicate pred) {
return first == last ? 0
: (pred(*first) ? 1 : 0) + sprout::detail::count_if_impl(sprout::next(first), last, pred)
;
}
template<typename InputIterator, typename Predicate>
inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator>::difference_type
count_if(
InputIterator first, InputIterator last, Predicate pred,
void*
)
{
return sprout::detail::count_if_impl(first, last, pred);
}
} //namespace detail
// 25.2.9 Count
template<typename InputIterator, typename Predicate>
inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator>::difference_type
count_if(InputIterator first, InputIterator last, Predicate pred) {
return first == last ? 0
: (pred(*first) ? 1 : 0) + sprout::count_if(sprout::next(first), last, pred)
;
typedef typename std::iterator_traits<InputIterator>::iterator_category* category;
return sprout::detail::count_if(first, last, pred, category());
}
} // namespace sprout