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bolero-MURAKAMI 2011-09-01 02:48:32 +00:00
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sprout/operation/fixed/join.hpp Normal file
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#ifndef SPROUT_OPERATION_FIXED_JOIN_HPP
#define SPROUT_OPERATION_FIXED_JOIN_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/fixed_container/traits.hpp>
#include <sprout/fixed_container/functions.hpp>
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT_DETAIL
namespace sprout {
namespace fixed {
namespace result_of {
//
// join
//
template<typename Container, typename Input>
struct join {
public:
typedef typename sprout::rebind_fixed_size<
typename sprout::fixed_container_traits<Container>::fixed_container_type
>::template apply<
sprout::fixed_container_traits<Container>::fixed_size + sprout::fixed_container_traits<Input>::fixed_size
>::type type;
};
} // namespace result_of
namespace detail {
template<typename Result, typename Container, typename Input, std::ptrdiff_t... Indexes>
SPROUT_CONSTEXPR inline Result join_impl(
Container const& cont,
sprout::index_tuple<Indexes...>,
typename sprout::fixed_container_traits<Container>::difference_type pos,
typename sprout::fixed_container_traits<Container>::difference_type size,
Input const& input
)
{
return Result{
(Indexes < sprout::fixed_container_traits<Container>::fixed_size + size
? (Indexes < pos
? *(sprout::fixed_begin(cont) + Indexes)
: Indexes < pos + size
? *(sprout::begin(input) + Indexes - pos)
: *(sprout::fixed_begin(cont) + Indexes - size)
)
: typename sprout::fixed_container_traits<Result>::value_type{}
)...
};
}
} // namespace detail
//
// join
//
template<typename Container, typename Input>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::join<Container, Input>::type join(
Container const& cont,
typename sprout::fixed_container_traits<Container>::const_iterator pos,
Input const& input
)
{
return sprout::fixed::detail::join_impl<typename sprout::fixed::result_of::join<Container, Input>::type>(
cont,
typename sprout::index_range<0, sprout::fixed_container_traits<typename sprout::fixed::result_of::join<Container, Input>::type>::fixed_size>::type(),
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), pos),
sprout::size(input),
input
);
}
//
// join
//
template<typename Container, typename Input>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::join<Container, Input>::type join(
Container const& cont,
typename sprout::fixed_container_traits<Container>::difference_type pos,
Input const& input
)
{
return sprout::fixed::detail::join_impl<typename sprout::fixed::result_of::join<Container, Input>::type>(
cont,
typename sprout::index_range<0, sprout::fixed_container_traits<typename sprout::fixed::result_of::join<Container, Input>::type>::fixed_size>::type(),
NS_SSCRISK_CEL_OR_SPROUT_DETAIL::distance(sprout::fixed_begin(cont), sprout::begin(cont) + pos),
sprout::size(input),
input
);
}
} // namespace fixed
} // namespace sprout
#endif // #ifndef SPROUT_OPERATION_FIXED_JOIN_HPP