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fix non-modidying operation algorithm iteration

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This commit is contained in:
bolero-MURAKAMI 2012-04-03 21:58:23 +09:00
parent db20f64991
commit cf593ffeff
7 changed files with 37 additions and 27 deletions
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16
sprout/algorithm/partition_point.hpp
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@ -12,8 +12,18 @@ namespace sprout {
template<typename ForwardIterator, typename Predicate>
SPROUT_CONSTEXPR ForwardIterator partition_point_impl(ForwardIterator first, ForwardIterator last, Predicate pred, ForwardIterator mid) {
return mid == last ? mid
: pred(*mid) ? sprout::detail::partition_point_impl(mid + 1, last, pred, mid + 1 + NS_SSCRISK_CEL_OR_SPROUT::distance(mid + 1, last) / 2)
: sprout::detail::partition_point_impl(first, mid, pred, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, mid) / 2)
: pred(*mid) ? sprout::detail::partition_point_impl(
sprout::next(mid),
last,
pred,
sprout::next(mid, 1 + NS_SSCRISK_CEL_OR_SPROUT::distance(sprout::next(mid), last) / 2)
)
: sprout::detail::partition_point_impl(
first,
mid,
pred,
sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, mid) / 2)
)
;
}
} // namespace detail
@ -21,7 +31,7 @@ namespace sprout {
// 25.3.13 Partitions
template<typename ForwardIterator, typename Predicate>
SPROUT_CONSTEXPR ForwardIterator partition_point(ForwardIterator first, ForwardIterator last, Predicate pred) {
return sprout::detail::partition_point_impl(first, last, pred, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2);
return sprout::detail::partition_point_impl(first, last, pred, sprout::next(first, NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2));
}
} // namespace sprout