mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2016 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_MAKE_TUPLE_HPP
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#define SPROUT_TUPLE_TUPLE_MAKE_TUPLE_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/index_tuple/metafunction.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/utility/pack.hpp>
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#include <sprout/functional/ref.hpp>
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#include <sprout/tuple/tuple/tuple.hpp>
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#include <sprout/tuple/tuple/get.hpp>
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#include <sprout/type/operation/tuple_cat.hpp>
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namespace sprout {
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namespace tuples {
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//
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// make_tuple
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//
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template<typename... Types>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<typename sprout::strip_reference<typename std::decay<Types>::type>::type...>
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make_tuple(Types&&... args) {
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return sprout::tuples::tuple<typename std::decay<Types>::type...>(SPROUT_FORWARD(Types, args)...);
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}
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//
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// forward_as_tuple
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//
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template<typename... Types>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<Types&&...>
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forward_as_tuple(Types&&... args) SPROUT_NOEXCEPT {
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return sprout::tuples::tuple<Types&&...>(SPROUT_FORWARD(Types, args)...);
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}
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//
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// tie
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//
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template<typename... Types>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<Types&...>
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tie(Types&... args) SPROUT_NOEXCEPT {
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return sprout::tuples::tuple<Types&...>(args...);
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}
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//
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// tuple_cat
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//
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namespace detail {
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template<typename PackIndexTuple, std::size_t... TupleSizes>
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struct tuple_cat_indexes_impl;
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template<sprout::index_t... PackIndexes, std::size_t... TupleSizes>
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struct tuple_cat_indexes_impl<sprout::index_tuple<PackIndexes...>, TupleSizes...> {
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public:
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typedef typename sprout::types::tuple_cat<typename sprout::index_n<PackIndexes, TupleSizes>::type...>::type for_pack;
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typedef typename sprout::types::tuple_cat<typename sprout::make_index_tuple<TupleSizes>::type...>::type for_element;
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};
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template<typename... Tuples>
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struct tuple_cat_indexes
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: public sprout::tuples::detail::tuple_cat_indexes_impl<
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typename sprout::make_index_tuple<sizeof...(Tuples)>::type,
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sprout::tuples::tuple_size<typename std::decay<Tuples>::type>::value...
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>
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{};
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template<typename Result, sprout::index_t... PackIndexes, sprout::index_t... ElemIndexes, typename... Tuples>
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static SPROUT_CONSTEXPR Result
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tuple_cat_impl(sprout::index_tuple<PackIndexes...>, sprout::index_tuple<ElemIndexes...>, Tuples&&... tuples) {
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return Result(sprout::tuples::get<ElemIndexes>(sprout::pack_get<PackIndexes>(SPROUT_FORWARD(Tuples, tuples)...))...);
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}
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} // namespace detail
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template<typename... Tuples>
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inline SPROUT_CONSTEXPR typename sprout::types::tuple_cat<typename std::decay<Tuples>::type...>::type
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tuple_cat(Tuples&&... tuples) {
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typedef typename sprout::types::tuple_cat<typename std::decay<Tuples>::type...>::type type;
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typedef sprout::tuples::detail::tuple_cat_indexes<Tuples...> indexes;
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return sprout::tuples::detail::tuple_cat_impl<type>(indexes::for_pack::make(), indexes::for_element::make(), SPROUT_FORWARD(Tuples, tuples)...);
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}
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} // namespace tuples
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using sprout::tuples::make_tuple;
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using sprout::tuples::forward_as_tuple;
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using sprout::tuples::tie;
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using sprout::tuples::tuple_cat;
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} // namespace sprout
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#endif // #ifndef SPROUT_TUPLE_TUPLE_MAKE_TUPLE_HPP
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