mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-16 10:49:05 +00:00
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2014 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_OPERATION_FIXED_ERASE_N_HPP
|
|
#define SPROUT_OPERATION_FIXED_ERASE_N_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/index_tuple/metafunction.hpp>
|
|
#include <sprout/container/traits.hpp>
|
|
#include <sprout/container/functions.hpp>
|
|
#include <sprout/container/indexes.hpp>
|
|
#include <sprout/iterator/operation.hpp>
|
|
|
|
namespace sprout {
|
|
namespace fixed {
|
|
namespace results {
|
|
//
|
|
// erase_n
|
|
//
|
|
template<std::size_t N, typename Container>
|
|
struct erase_n
|
|
: public sprout::container_transform_traits<
|
|
Container
|
|
>::template rebind_size<
|
|
sprout::container_traits<Container>::static_size - N
|
|
>
|
|
{
|
|
static_assert(sprout::container_traits<Container>::static_size >= N, "static_size >= N");
|
|
};
|
|
} // namespace results
|
|
|
|
namespace detail {
|
|
template<std::size_t N, typename Result, typename Container, sprout::index_t... Indexes>
|
|
inline SPROUT_CONSTEXPR Result
|
|
erase_n_impl(
|
|
Container const& cont, sprout::index_tuple<Indexes...>,
|
|
typename sprout::container_traits<Container>::difference_type pos
|
|
)
|
|
{
|
|
return sprout::remake<Result>(
|
|
cont,
|
|
sprout::size(cont) - N,
|
|
(Indexes < sprout::container_traits<Container>::static_size - N
|
|
? (Indexes < pos
|
|
? *sprout::next(sprout::internal_begin(cont), Indexes)
|
|
: *sprout::next(sprout::internal_begin(cont), Indexes + N)
|
|
)
|
|
: typename sprout::container_traits<Result>::value_type()
|
|
)...
|
|
);
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// erase_n
|
|
//
|
|
template<std::size_t N, typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::results::erase_n<N, Container>::type
|
|
erase_n(Container const& cont, typename sprout::container_traits<Container>::const_iterator pos) {
|
|
return sprout::fixed::detail::erase_n_impl<N, typename sprout::fixed::results::erase_n<N, Container>::type>(
|
|
cont,
|
|
sprout::container_indexes<typename sprout::fixed::results::erase_n<N, Container>::type>::make(),
|
|
sprout::distance(sprout::internal_begin(cont), pos)
|
|
);
|
|
}
|
|
template<std::size_t N, typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::fixed::results::erase_n<N, Container>::type
|
|
erase_n(Container const& cont, typename sprout::container_traits<Container>::difference_type pos) {
|
|
return sprout::fixed::detail::erase_n_impl<N, typename sprout::fixed::results::erase_n<N, Container>::type>(
|
|
cont,
|
|
sprout::container_indexes<typename sprout::fixed::results::erase_n<N, Container>::type>::make(),
|
|
sprout::distance(sprout::internal_begin(cont), sprout::next(sprout::begin(cont), pos))
|
|
);
|
|
}
|
|
} // namespace fixed
|
|
|
|
namespace results {
|
|
using sprout::fixed::results::erase_n;
|
|
} // namespace results
|
|
|
|
using sprout::fixed::erase_n;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_OPERATION_FIXED_ERASE_N_HPP
|