Sprout/sprout/algorithm/fixed/push_heap.hpp
2011-10-02 00:19:13 +09:00

74 lines
2.3 KiB
C++

#ifndef SPROUT_ALGORITHM_FIXED_PUSH_HEAP_HPP
#define SPROUT_ALGORITHM_FIXED_PUSH_HEAP_HPP
#include <sprout/config.hpp>
#include <sprout/fixed_container/traits.hpp>
#include <sprout/fixed_container/functions.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
#include <sprout/algorithm/fixed/swap_element.hpp>
#include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT_DETAIL
namespace sprout {
namespace fixed {
namespace detail {
template<typename Container, typename Compare>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type push_heap_impl(
Container const& cont,
Compare comp,
typename sprout::fixed_container_traits<Container>::difference_type offset,
typename sprout::fixed_container_traits<Container>::difference_type n
)
{
return n != 0 && comp(*sprout::next(sprout::fixed_begin(cont), offset + (n - 1) / 2), *sprout::next(sprout::fixed_begin(cont), offset + n))
? sprout::fixed::detail::push_heap_impl(
sprout::fixed::swap_element(
cont,
sprout::next(sprout::fixed_begin(cont), offset + (n - 1) / 2),
sprout::next(sprout::fixed_begin(cont), offset + n)
),
comp,
offset,
(n - 1) / 2
)
: sprout::clone(cont)
;
}
} // namespace detail
//
// push_heap
//
template<typename Container, typename Compare>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type push_heap(
Container const& cont,
Compare comp
)
{
return sprout::fixed::detail::push_heap_impl(
cont,
comp,
sprout::fixed_begin_offset(cont),
sprout::size(cont) - 1
);
}
//
// push_heap
//
template<typename Container>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type push_heap(
Container const& cont
)
{
return sprout::fixed::detail::push_heap_impl(
cont,
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::less<typename sprout::fixed_container_traits<Container>::value_type>(),
sprout::fixed_begin_offset(cont),
sprout::size(cont) - 1
);
}
} // namespace fixed
using sprout::fixed::push_heap;
} // namespace sprout
#endif // #ifndef SPROUT_ALGORITHM_FIXED_PUSH_HEAP_HPP