mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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165 lines
5.3 KiB
C++
165 lines
5.3 KiB
C++
#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.hpp>
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#include <sprout/utility/forward.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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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 std::decay<Types>::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::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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namespace result_of {
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namespace detail {
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template<typename... Tuples>
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struct tuple_cat_impl;
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template<>
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struct tuple_cat_impl<> {
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typedef sprout::tuples::tuple<> type;
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};
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template<typename Tuple>
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struct tuple_cat_impl<Tuple> {
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private:
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template<typename Tup, typename IndexTuple>
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struct make;
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template<typename Tup, sprout::index_t... Indexes>
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struct make<Tup, sprout::index_tuple<Indexes...> > {
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public:
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typedef sprout::tuples::tuple<typename sprout::tuples::tuple_element<Indexes, Tup>::type...> type;
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};
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public:
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typedef typename make<
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Tuple, typename sprout::index_range<0, sprout::tuples::tuple_size<Tuple>::value>::type
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>::type type;
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};
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template<typename T, typename U, typename... Tuples>
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struct tuple_cat_impl<T, U, Tuples...> {
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private:
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template<typename Tup1, typename IndexTuple1, typename Tup2, typename IndexTuple2>
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struct make;
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template<typename Tup1, sprout::index_t... Indexes1, typename Tup2, sprout::index_t... Indexes2>
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struct make<Tup1, sprout::index_tuple<Indexes1...>, Tup2, sprout::index_tuple<Indexes2...> > {
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public:
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typedef sprout::tuples::tuple<
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typename sprout::tuples::tuple_element<Indexes1, Tup1>::type...,
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typename sprout::tuples::tuple_element<Indexes2, Tup2>::type...
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> type;
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};
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public:
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typedef typename sprout::tuples::result_of::detail::tuple_cat_impl<
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typename make<
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T, typename sprout::index_range<0, sprout::tuples::tuple_size<T>::value>::type,
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U, typename sprout::index_range<0, sprout::tuples::tuple_size<U>::value>::type
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>::type,
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Tuples...
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>::type type;
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};
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} // namespace detail
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//
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// tuple_cat
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//
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template<typename... Tuples>
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struct tuple_cat
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: public sprout::tuples::result_of::detail::tuple_cat_impl<
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typename std::decay<Tuples>::type...
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>
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{};
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} // namespace result_of
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namespace detail {
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template<typename... Tuples>
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struct tuple_cat_1st_indexes;
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template<>
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struct tuple_cat_1st_indexes<> {
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public:
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typedef sprout::index_tuple<> type;
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};
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template<typename Head, typename... Tail>
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struct tuple_cat_1st_indexes<Head, Tail...> {
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public:
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typedef typename sprout::index_range<
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0, sprout::tuples::tuple_size<typename std::remove_reference<Head>::type>::value
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>::type type;
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};
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template<typename Result, typename IndexTuple, typename... Tuples>
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struct tuple_cat_impl;
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template<typename Result>
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struct tuple_cat_impl<Result, sprout::index_tuple<> > {
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public:
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template<typename... Args>
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static SPROUT_CONSTEXPR Result
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call(Args&&... args) {
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return Result(sprout::forward<Args>(args)...);
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}
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};
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template<typename Result, sprout::index_t... Indexes, typename Head, typename... Tail>
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struct tuple_cat_impl<Result, sprout::index_tuple<Indexes...>, Head, Tail...> {
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public:
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template<typename T, typename... Args>
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static SPROUT_CONSTEXPR Result
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call(T&& t, Args&&... args) {
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return sprout::tuples::detail::tuple_cat_impl<
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Result,
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typename sprout::tuples::detail::tuple_cat_1st_indexes<Tail...>::type,
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Tail...
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>::call(
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sprout::forward<Args>(args)...,
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sprout::tuples::get<Indexes>(sprout::forward<T>(t))...
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);
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}
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};
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} // namespace detail
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//
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// tuple_cat
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//
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template<typename... Tuples>
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inline SPROUT_CONSTEXPR typename sprout::tuples::result_of::tuple_cat<Tuples...>::type
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tuple_cat(Tuples&&... tuples) {
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return sprout::tuples::detail::tuple_cat_impl<
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typename sprout::tuples::result_of::tuple_cat<Tuples...>::type,
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typename sprout::tuples::detail::tuple_cat_1st_indexes<Tuples...>::type,
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Tuples...
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>::call(sprout::forward<Tuples>(tuples)...);
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}
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} // namespace tuples
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namespace result_of {
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using sprout::tuples::result_of::tuple_cat;
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} // namespace result_of
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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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