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56 lines
1.6 KiB
C++
56 lines
1.6 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_DARKROOM_ACCESS_ACCESS_HPP
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#define SPROUT_DARKROOM_ACCESS_ACCESS_HPP
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#include <sprout/config.hpp>
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#include <sprout/workaround/std/cstddef.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/darkroom/access/traits.hpp>
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namespace sprout {
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namespace darkroom {
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namespace access {
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//
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// element
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//
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template<std::size_t I, typename T>
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struct element
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: public sprout::tuples::tuple_element<I, T>
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{};
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//
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// size
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//
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template<typename T>
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struct size
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: public sprout::tuples::tuple_size<T>
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{};
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//
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// unit
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//
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template<typename T>
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struct unit
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: public sprout::darkroom::access::element<0, T>
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{};
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//
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// get
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//
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template<std::size_t I, typename T>
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inline SPROUT_CONSTEXPR auto
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get(T&& t)
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SPROUT_NOEXCEPT_IF_EXPR(sprout::tuples::get<I>(SPROUT_FORWARD(T, t)))
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-> decltype(sprout::tuples::get<I>(SPROUT_FORWARD(T, t)))
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{
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return sprout::tuples::get<I>(SPROUT_FORWARD(T, t));
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}
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} // namespace access
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} // namespace darkroom
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} // namespace sprout
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#endif // #ifndef SPROUT_DARKROOM_ACCESS_ACCESS_HPP
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