mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
#ifndef SPROUT_OPERATION_FIXED_RESIZE_BACKWARD_HPP
|
|
#define SPROUT_OPERATION_FIXED_RESIZE_BACKWARD_HPP
|
|
|
|
#include <cstddef>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/index_tuple.hpp>
|
|
#include <sprout/container/traits.hpp>
|
|
#include <sprout/container/functions.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
#include <sprout/operation/fixed/resize.hpp>
|
|
|
|
namespace sprout {
|
|
namespace fixed {
|
|
namespace result_of {
|
|
//
|
|
// resize_backward
|
|
//
|
|
template<std::size_t N, typename Container>
|
|
struct resize_backward
|
|
: public sprout::fixed::result_of::resize<N, Container>
|
|
{};
|
|
} // namespace result_of
|
|
|
|
namespace detail {
|
|
template<typename Result, typename Container, typename T, sprout::index_t... Indexes>
|
|
inline SPROUT_CONSTEXPR Result
|
|
resize_backward_impl(
|
|
Container const& cont, sprout::index_tuple<Indexes...>,
|
|
typename sprout::container_traits<Result>::difference_type size,
|
|
typename sprout::container_traits<Result>::difference_type offset,
|
|
T const& v
|
|
)
|
|
{
|
|
return sprout::make<Result>(
|
|
(Indexes >= offset && Indexes < offset + size
|
|
? *sprout::next(sprout::begin(cont), Indexes - offset)
|
|
: v
|
|
)...
|
|
);
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// resize_backward
|
|
//
|
|
template<std::size_t N, typename Container, typename T>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::resize_backward<N, Container>::type
|
|
resize_backward(Container const& cont, T const& v) {
|
|
return sprout::fixed::detail::resize_backward_impl<typename sprout::fixed::result_of::resize_backward<N, Container>::type>(
|
|
cont,
|
|
sprout::index_range<
|
|
0,
|
|
sprout::container_traits<typename sprout::fixed::result_of::resize_backward<N, Container>::type>::static_size
|
|
>::make(),
|
|
sprout::size(cont),
|
|
static_cast<typename sprout::container_traits<Container>::difference_type>(
|
|
sprout::container_traits<typename sprout::fixed::result_of::resize_backward<N, Container>::type>::static_size
|
|
)
|
|
- sprout::size(cont),
|
|
v
|
|
);
|
|
}
|
|
|
|
namespace detail {
|
|
template<typename Result, typename Container, sprout::index_t... Indexes>
|
|
inline SPROUT_CONSTEXPR Result
|
|
resize_backward_impl(
|
|
Container const& cont, sprout::index_tuple<Indexes...>,
|
|
typename sprout::container_traits<Result>::difference_type size,
|
|
typename sprout::container_traits<Result>::difference_type offset
|
|
)
|
|
{
|
|
return sprout::make<Result>(
|
|
(Indexes >= offset && Indexes < offset + size
|
|
? *sprout::next(sprout::begin(cont), Indexes - offset)
|
|
: typename sprout::container_traits<Result>::value_type()
|
|
)...
|
|
);
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// resize_backward
|
|
//
|
|
template<std::size_t N, typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::resize_backward<N, Container>::type
|
|
resize_backward(Container const& cont) {
|
|
return sprout::fixed::detail::resize_backward_impl<typename sprout::fixed::result_of::resize_backward<N, Container>::type>(
|
|
cont,
|
|
sprout::index_range<
|
|
0,
|
|
sprout::container_traits<typename sprout::fixed::result_of::resize_backward<N, Container>::type>::static_size
|
|
>::make(),
|
|
sprout::size(cont),
|
|
static_cast<typename sprout::container_traits<Container>::difference_type>(
|
|
sprout::container_traits<typename sprout::fixed::result_of::resize_backward<N, Container>::type>::static_size
|
|
)
|
|
- sprout::size(cont)
|
|
);
|
|
}
|
|
} // namespace fixed
|
|
|
|
namespace result_of {
|
|
using sprout::fixed::result_of::resize_backward;
|
|
} // namespace result_of
|
|
|
|
using sprout::fixed::resize_backward;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_OPERATION_FIXED_RESIZE_BACKWARD_HPP
|