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Sprout/sprout/operation/fixed/pop_back_n.hpp
2018-12-30 17:25:21 +09:00

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1.7 KiB
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/*=============================================================================
Copyright (c) 2011-2018 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_POP_BACK_N_HPP
#define SPROUT_OPERATION_FIXED_POP_BACK_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/operation/fixed/erase_n.hpp>
namespace sprout {
namespace fixed {
namespace results {
//
// pop_back_n
//
template<std::size_t N, typename Container>
struct pop_back_n
: public sprout::fixed::results::erase_n<N, Container>
{};
} // namespace results
//
// pop_back_n
//
template<std::size_t N, typename Container>
inline SPROUT_CONSTEXPR typename sprout::fixed::results::pop_back_n<N, Container>::type
pop_back_n(Container const& cont) {
return sprout::fixed::detail::erase_n_impl<N, typename sprout::fixed::results::pop_back_n<N, Container>::type>(
cont,
sprout::container_indexes<typename sprout::fixed::results::pop_back_n<N, Container>::type>::make(),
sprout::internal_end_offset(cont) - N
);
}
} // namespace fixed
namespace results {
using sprout::fixed::results::pop_back_n;
} // namespace results
using sprout::fixed::pop_back_n;
} // namespace sprout
#endif // #ifndef SPROUT_OPERATION_FIXED_POP_BACK_N_HPP