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https://github.com/bolero-MURAKAMI/Sprout.git
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53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2019 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_TUPLE_OPERATION_POP_BACK_HPP
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#define SPROUT_TUPLE_OPERATION_POP_BACK_HPP
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#include <sprout/config.hpp>
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#include <sprout/index_tuple/metafunction.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/tuple/functions.hpp>
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#include <sprout/type/operation/pop_back.hpp>
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namespace sprout {
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namespace tuples {
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namespace results {
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//
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// pop_back
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//
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template<typename Tuple>
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struct pop_back
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: public sprout::types::pop_back<Tuple>
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{};
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} // namespace results
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namespace detail {
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template<typename Result, typename Tuple, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR Result
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pop_back_impl(Tuple const& t, sprout::index_tuple<Indexes...>) {
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return sprout::tuples::remake<Result>(
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t,
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sprout::tuples::get<Indexes>(t)...
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);
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}
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} // namespace detail
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//
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// pop_back
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//
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template<typename Tuple>
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inline SPROUT_CONSTEXPR typename sprout::tuples::results::pop_back<Tuple>::type
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pop_back(Tuple const& t) {
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return sprout::tuples::detail::pop_back_impl<typename sprout::tuples::results::pop_back<Tuple>::type>(
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t,
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sprout::make_index_tuple<sprout::tuples::tuple_size<Tuple>::value - 1>::make()
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);
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}
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} // namespace tuples
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} // namespace sprout
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#endif // #ifndef SPROUT_TUPLE_OPERATION_POP_BACK_HPP
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