mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-23 21:25:49 +00:00
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
#ifndef SPROUT_ALGORITHM_ALL_OF_HPP
|
|
#define SPROUT_ALGORITHM_ALL_OF_HPP
|
|
|
|
#include <iterator>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
#include <sprout/iterator/type_traits/is_iterator.hpp>
|
|
#include <sprout/utility/pair.hpp>
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
template<typename RandomAccessIterator, typename Predicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
all_of_impl_ra(
|
|
RandomAccessIterator first, RandomAccessIterator last, Predicate pred,
|
|
typename std::iterator_traits<RandomAccessIterator>::difference_type pivot
|
|
)
|
|
{
|
|
return pivot == 0 ? pred(*first)
|
|
: sprout::detail::all_of_impl_ra(
|
|
first, sprout::next(first, pivot), pred,
|
|
pivot / 2
|
|
)
|
|
&& sprout::detail::all_of_impl_ra(
|
|
sprout::next(first, pivot), last, pred,
|
|
(sprout::distance(first, last) - pivot) / 2
|
|
)
|
|
;
|
|
}
|
|
template<typename RandomAccessIterator, typename Predicate>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
sprout::is_constant_distance_iterator<RandomAccessIterator>::value,
|
|
bool
|
|
>::type
|
|
all_of(
|
|
RandomAccessIterator first, RandomAccessIterator last, Predicate pred,
|
|
std::random_access_iterator_tag*
|
|
)
|
|
{
|
|
return first == last ? true
|
|
: sprout::detail::all_of_impl_ra(first, last, pred, sprout::distance(first, last) / 2)
|
|
;
|
|
}
|
|
|
|
template<typename InputIterator, typename Predicate>
|
|
inline SPROUT_CONSTEXPR sprout::pair<InputIterator, bool>
|
|
all_of_impl_1(
|
|
sprout::pair<InputIterator, bool> const& current,
|
|
InputIterator last, Predicate pred, typename std::iterator_traits<InputIterator>::difference_type n
|
|
)
|
|
{
|
|
typedef sprout::pair<InputIterator, bool> type;
|
|
return !current.second || current.first == last ? current
|
|
: n == 1 ? pred(*current.first) ? type(sprout::next(current.first), true) : type(current.first, false)
|
|
: sprout::detail::all_of_impl_1(
|
|
sprout::detail::all_of_impl_1(
|
|
current,
|
|
last, pred, n / 2
|
|
),
|
|
last, pred, n - n / 2
|
|
)
|
|
;
|
|
}
|
|
template<typename InputIterator, typename Predicate>
|
|
inline SPROUT_CONSTEXPR sprout::pair<InputIterator, bool>
|
|
all_of_impl(
|
|
sprout::pair<InputIterator, bool> const& current,
|
|
InputIterator last, Predicate pred, typename std::iterator_traits<InputIterator>::difference_type n
|
|
)
|
|
{
|
|
typedef sprout::pair<InputIterator, bool> type;
|
|
return !current.second || current.first == last ? current
|
|
: sprout::detail::all_of_impl(
|
|
sprout::detail::all_of_impl_1(
|
|
current,
|
|
last, pred, n
|
|
),
|
|
last, pred, n * 2
|
|
)
|
|
;
|
|
}
|
|
template<typename InputIterator, typename Predicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
all_of(
|
|
InputIterator first, InputIterator last, Predicate pred,
|
|
void*
|
|
)
|
|
{
|
|
typedef sprout::pair<InputIterator, bool> type;
|
|
return sprout::detail::all_of_impl(type(first, true), last, pred, 1).second;
|
|
}
|
|
} //namespace detail
|
|
|
|
// 25.2.1 All of
|
|
//
|
|
// recursion depth:
|
|
// O(log N)
|
|
//
|
|
template<typename InputIterator, typename Predicate>
|
|
inline SPROUT_CONSTEXPR bool
|
|
all_of(InputIterator first, InputIterator last, Predicate pred) {
|
|
typedef typename std::iterator_traits<InputIterator>::iterator_category* category;
|
|
return sprout::detail::all_of(first, last, pred, category());
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_ALGORITHM_ALL_OF_HPP
|