mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2015 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_TUPLE_TUPLE_TRAITS_HPP
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#define SPROUT_TUPLE_TUPLE_TUPLE_TRAITS_HPP
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#include <tuple>
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#include <type_traits>
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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/tuple_size.hpp>
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#include <sprout/tuple/tuple/tuple_element.hpp>
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namespace sprout {
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namespace tuples {
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//
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// tuple_traits
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//
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template<typename Tuple>
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struct tuple_traits {
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public:
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SPROUT_STATIC_CONSTEXPR std::size_t size = sprout::tuples::tuple_size<Tuple>::value;
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public:
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template<std::size_t I>
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struct element
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: public sprout::tuples::tuple_element<I, Tuple>
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{};
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template<std::size_t I>
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struct lvalue_reference
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: public std::add_lvalue_reference<typename element<I>::type>
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{};
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template<std::size_t I>
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struct const_lvalue_reference
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: public std::add_lvalue_reference<typename element<I>::type const>
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{};
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template<std::size_t I>
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struct rvalue_reference
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: public std::add_rvalue_reference<typename element<I>::type>
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{};
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template<std::size_t I>
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struct const_rvalue_reference
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: public std::add_rvalue_reference<typename element<I>::type const>
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{};
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};
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template<typename Tuple>
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SPROUT_CONSTEXPR_OR_CONST std::size_t sprout::tuples::tuple_traits<Tuple>::size;
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template<typename Tuple>
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struct tuple_traits<Tuple const> {
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public:
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SPROUT_STATIC_CONSTEXPR std::size_t size = sprout::tuples::tuple_traits<Tuple>::size;
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public:
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template<std::size_t I>
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struct element
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: public sprout::tuples::tuple_traits<Tuple>::template element<I>
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{};
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template<std::size_t I>
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struct lvalue_reference
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: public sprout::tuples::tuple_traits<Tuple>::template const_lvalue_reference<I>
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{};
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template<std::size_t I>
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struct const_lvalue_reference
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: public sprout::tuples::tuple_traits<Tuple>::template const_lvalue_reference<I>
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{};
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template<std::size_t I>
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struct rvalue_reference
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: public sprout::tuples::tuple_traits<Tuple>::template const_rvalue_reference<I>
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{};
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template<std::size_t I>
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struct const_rvalue_reference
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: public sprout::tuples::tuple_traits<Tuple>::template const_rvalue_reference<I>
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{};
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};
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template<typename Tuple>
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SPROUT_CONSTEXPR_OR_CONST std::size_t sprout::tuples::tuple_traits<Tuple const>::size;
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} // namespace tuples
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using sprout::tuples::tuple_traits;
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} // namespace sprout
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#endif // #ifndef SPROUT_TUPLE_TUPLE_TUPLE_TRAITS_HPP
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