2011-10-30 14:10:24 +00:00
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#ifndef SPROUT_TUPLE_TUPLE_HPP
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#define SPROUT_TUPLE_TUPLE_HPP
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#include <cstddef>
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#include <utility>
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#include <type_traits>
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#include <tuple>
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#include <sprout/config.hpp>
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2011-11-03 04:15:21 +00:00
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#include <sprout/utility/operation.hpp>
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2011-10-30 14:10:24 +00:00
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namespace sprout {
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namespace tuples {
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namespace detail {
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template<std::size_t Index, typename Head, bool IsEmpty>
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class head_base;
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template<std::size_t Index, typename Head>
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class head_base<Index, Head, true>
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: public Head
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{
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public:
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static SPROUT_CONSTEXPR Head& head(head_base& t) SPROUT_NOEXCEPT {
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return t;
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}
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static SPROUT_CONSTEXPR Head const& head(head_base const& t) SPROUT_NOEXCEPT {
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return t;
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}
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public:
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SPROUT_CONSTEXPR head_base()
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: Head()
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{}
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SPROUT_CONSTEXPR head_base(Head const& v)
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: Head(v)
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{}
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template<typename UHead>
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SPROUT_CONSTEXPR head_base(UHead&& v)
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: Head(sprout::forward<UHead>(v))
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{}
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};
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template<std::size_t Index, typename Head>
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class head_base<Index, Head, false> {
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public:
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static SPROUT_CONSTEXPR Head& head(head_base& t) SPROUT_NOEXCEPT {
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return t.head_;
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}
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static SPROUT_CONSTEXPR Head const& head(head_base const& t) SPROUT_NOEXCEPT {
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return t.head_;
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}
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private:
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Head head_;
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public:
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SPROUT_CONSTEXPR head_base()
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: head_()
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{}
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SPROUT_CONSTEXPR head_base(Head const& v)
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: head_(v)
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{}
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template<typename UHead>
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SPROUT_CONSTEXPR head_base(UHead&& v)
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: head_(sprout::forward<UHead>(v))
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{}
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};
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template<std::size_t Index, typename... Types>
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class tuple_impl;
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template<std::size_t Index>
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class tuple_impl<Index> {
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public:
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template<std::size_t, typename...>
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friend class sprout::tuples::detail::tuple_impl;
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protected:
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void swap(tuple_impl&) SPROUT_NOEXCEPT {}
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public:
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tuple_impl() = default;
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2011-11-03 04:15:21 +00:00
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template<typename... UTypes>
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SPROUT_CONSTEXPR explicit tuple_impl(UTypes&&... args) SPROUT_NOEXCEPT {}
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SPROUT_CONSTEXPR tuple_impl(tuple_impl const&) = default;
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SPROUT_CONSTEXPR tuple_impl(tuple_impl&&) = default;
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template<typename... UTypes>
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SPROUT_CONSTEXPR tuple_impl(tuple_impl<Index, UTypes...> const& t) SPROUT_NOEXCEPT {}
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template<typename... UTypes>
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SPROUT_CONSTEXPR tuple_impl(tuple_impl<Index, UTypes...>&& t) SPROUT_NOEXCEPT {}
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tuple_impl& operator=(tuple_impl const&) = default;
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tuple_impl& operator=(tuple_impl&& t) = default;
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template<typename... UTypes>
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tuple_impl& operator=(sprout::tuples::detail::tuple_impl<Index, UTypes...> const&) SPROUT_NOEXCEPT {
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return *this;
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}
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template<typename... UTypes>
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tuple_impl& operator=(sprout::tuples::detail::tuple_impl<Index, UTypes...>&&) SPROUT_NOEXCEPT {
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return *this;
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}
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2011-10-30 14:10:24 +00:00
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};
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template<std::size_t Index, typename Head, typename... Tail>
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class tuple_impl<Index, Head, Tail...>
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: public sprout::tuples::detail::tuple_impl<Index + 1, Tail...>
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, private sprout::tuples::detail::head_base<Index, Head, std::is_empty<Head>::value>
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{
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public:
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template<std::size_t, typename...>
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friend class sprout::tuples::detail::tuple_impl;
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public:
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typedef sprout::tuples::detail::tuple_impl<Index + 1, Tail...> inherited_type;
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typedef sprout::tuples::detail::head_base<Index, Head, std::is_empty<Head>::value> base_type;
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public:
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static SPROUT_CONSTEXPR Head& head(tuple_impl& t) SPROUT_NOEXCEPT {
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return base_type::head(t);
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}
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2011-11-03 04:15:21 +00:00
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static SPROUT_CONSTEXPR Head const& head(tuple_impl const& t) SPROUT_NOEXCEPT {
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2011-10-30 14:10:24 +00:00
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return base_type::head(t);
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}
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static SPROUT_CONSTEXPR inherited_type& tail(tuple_impl& t) SPROUT_NOEXCEPT {
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return t;
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}
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static SPROUT_CONSTEXPR inherited_type const& tail(tuple_impl const& t) SPROUT_NOEXCEPT {
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return t;
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}
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protected:
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void swap(tuple_impl& t) SPROUT_NOEXCEPT_EXPR(
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SPROUT_NOEXCEPT_EXPR(swap(std::declval<Head&>(), std::declval<Head&>()))
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&& SPROUT_NOEXCEPT_EXPR(tail(t).swap(tail(t)))
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)
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{
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using std::swap;
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swap(head(*this), head(t));
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inherited_type::swap(tail(t));
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}
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public:
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SPROUT_CONSTEXPR tuple_impl()
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: inherited_type()
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, base_type()
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{}
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SPROUT_CONSTEXPR explicit tuple_impl(const Head& h, Tail const&... tail)
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: inherited_type(tail...)
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, base_type(h)
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{}
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2011-11-03 04:15:21 +00:00
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template<typename UHead, typename... UTail>
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2011-10-30 14:10:24 +00:00
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SPROUT_CONSTEXPR explicit tuple_impl(UHead&& h, UTail&&... tail)
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: inherited_type(sprout::forward<UTail>(tail)...)
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, base_type(sprout::forward<UHead>(h))
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{}
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SPROUT_CONSTEXPR tuple_impl(tuple_impl const&) = default;
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SPROUT_CONSTEXPR tuple_impl(tuple_impl&& t)
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SPROUT_NOEXCEPT_EXPR(std::is_nothrow_move_constructible<Head>::value && std::is_nothrow_move_constructible<inherited_type>::value)
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: inherited_type(sprout::move(tail(t)))
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2011-10-30 14:10:24 +00:00
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, base_type(sprout::forward<Head>(head(t)))
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{}
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template<typename... UTypes>
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SPROUT_CONSTEXPR tuple_impl(tuple_impl<Index, UTypes...> const& t)
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: inherited_type(sprout::tuples::detail::tuple_impl<Index, UTypes...>::tail(t))
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, base_type(sprout::tuples::detail::tuple_impl<Index, UTypes...>::head(t))
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{}
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template<typename UHead, typename... UTail>
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SPROUT_CONSTEXPR tuple_impl(tuple_impl<Index, UHead, UTail...>&& t)
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: inherited_type(sprout::move(sprout::tuples::detail::tuple_impl<Index, UHead, UTail...>::tail(t)))
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2011-10-30 14:10:24 +00:00
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, base_type(sprout::forward<UHead>(sprout::tuples::detail::tuple_impl<Index, UHead, UTail...>::head(t)))
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{}
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SPROUT_CONSTEXPR tuple_impl(tuple_impl<Index> const& t)
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: inherited_type()
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, base_type()
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{}
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SPROUT_CONSTEXPR tuple_impl(tuple_impl<Index>&& t)
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: inherited_type()
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, base_type()
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{}
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tuple_impl& operator=(tuple_impl const& t) {
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head(*this) = head(t);
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tail(*this) = tail(t);
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return *this;
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}
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tuple_impl& operator=(tuple_impl&& t)
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SPROUT_NOEXCEPT_EXPR(std::is_nothrow_move_assignable<Head>::value && std::is_nothrow_move_assignable<inherited_type>::value)
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{
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head(*this) = sprout::forward<Head>(head(t));
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tail(*this) = sprout::move(tail(t));
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return *this;
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}
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template<typename... UTypes>
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tuple_impl& operator=(sprout::tuples::detail::tuple_impl<Index, UTypes...> const& t) {
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head(*this) = sprout::tuples::detail::tuple_impl<Index, UTypes...>::head(t);
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tail(*this) = sprout::tuples::detail::tuple_impl<Index, UTypes...>::tail(t);
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return *this;
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}
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template<typename UHead, typename... UTail>
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tuple_impl& operator=(sprout::tuples::detail::tuple_impl<Index, UHead, UTail...>&& t) {
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head(*this) = sprout::forward<UHead>(sprout::tuples::detail::tuple_impl<Index, UHead, UTail...>::head(t));
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2011-11-03 04:15:21 +00:00
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tail(*this) = sprout::move(sprout::tuples::detail::tuple_impl<Index, UHead, UTail...>::tail(t));
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return *this;
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}
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tuple_impl& operator=(sprout::tuples::detail::tuple_impl<Index> const& t) {
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*this = sprout::move(tuple_impl());
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return *this;
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}
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tuple_impl& operator=(sprout::tuples::detail::tuple_impl<Index>&& t) {
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*this = sprout::move(tuple_impl());
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2011-10-30 14:10:24 +00:00
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return *this;
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}
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};
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} // namespace detail
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//
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// tuple
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//
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template<typename... Types>
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class tuple
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: public sprout::tuples::detail::tuple_impl<0, Types...>
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{
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public:
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typedef sprout::tuples::detail::tuple_impl<0, Types...> inherited_type;
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public:
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// tuple construction
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SPROUT_CONSTEXPR tuple()
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: inherited_type()
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{}
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SPROUT_CONSTEXPR explicit tuple(Types const&... elements)
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: inherited_type(elements...)
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{}
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2011-11-03 04:15:21 +00:00
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template<typename... UTypes>
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2011-10-30 14:10:24 +00:00
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SPROUT_CONSTEXPR explicit tuple(UTypes&&... elements)
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: inherited_type(sprout::forward<UTypes>(elements)...)
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{}
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SPROUT_CONSTEXPR tuple(tuple const &) = default;
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SPROUT_CONSTEXPR tuple(tuple&&) = default;
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template<typename... UTypes>
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SPROUT_CONSTEXPR tuple(sprout::tuples::tuple<UTypes...> const& t)
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: inherited_type(static_cast<sprout::tuples::detail::tuple_impl<0, UTypes...> const&>(t))
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{}
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2011-11-03 04:15:21 +00:00
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template<typename... UTypes>
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SPROUT_CONSTEXPR tuple(sprout::tuples::tuple<UTypes...>&& t)
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: inherited_type(static_cast<sprout::tuples::detail::tuple_impl<0, UTypes...>&&>(t))
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{}
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// tuple assignment
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tuple& operator=(const tuple& rhs) {
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static_cast<inherited_type&>(*this) = rhs;
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return *this;
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}
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tuple& operator=(tuple&& rhs) SPROUT_NOEXCEPT_EXPR(std::is_nothrow_move_assignable<inherited_type>::value) {
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static_cast<inherited_type&>(*this) = sprout::move(rhs);
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return *this;
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}
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template<typename... UTypes>
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tuple& operator=(sprout::tuples::tuple<UTypes...> const& rhs) {
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static_cast<inherited_type&>(*this) = rhs;
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return *this;
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}
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template<typename... UTypes>
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tuple& operator=(sprout::tuples::tuple<UTypes...>&& rhs) {
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static_cast<inherited_type&>(*this) = sprout::move(rhs);
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return *this;
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}
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// tuple swap
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void swap(tuple& other) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(other.swap(other))) {
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inherited_type::swap(other);
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}
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};
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template<>
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class tuple<> {
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public:
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// tuple swap
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void swap(tuple&) SPROUT_NOEXCEPT {}
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};
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//
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// ignore_t
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//
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struct ignore_t {
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template<typename T>
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ignore_t const& operator=(T const&) const {
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return *this;
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}
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};
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//
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// ignore
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//
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static SPROUT_CONSTEXPR ignore_t ignore{};
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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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SPROUT_CONSTEXPR inline sprout::tuples::tuple<typename std::decay<Types>::type...> 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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SPROUT_CONSTEXPR inline sprout::tuples::tuple<Types&&...> forward_as_tuple(Types&&... args) SPROUT_NOEXCEPT {
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|
|
return sprout::tuples::tuple<Types&&...>(sprout::forward<Types>(args)...);
|
|
|
|
|
}
|
|
|
|
|
//
|
|
|
|
|
// tie
|
|
|
|
|
//
|
|
|
|
|
template<typename... Types>
|
|
|
|
|
inline sprout::tuples::tuple<Types&...> tie(Types&... args) SPROUT_NOEXCEPT {
|
|
|
|
|
return sprout::tuples::tuple<Types&...>(args...);
|
|
|
|
|
}
|
|
|
|
|
|
2011-10-31 11:10:07 +00:00
|
|
|
//
|
|
|
|
|
// swap
|
|
|
|
|
//
|
|
|
|
|
template<typename... Types>
|
|
|
|
|
inline void swap(
|
|
|
|
|
sprout::tuples::tuple<Types...>& lhs,
|
|
|
|
|
sprout::tuples::tuple<Types...>& rhs
|
|
|
|
|
) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(lhs.swap(rhs)))
|
|
|
|
|
{
|
|
|
|
|
lhs.swap(rhs);
|
|
|
|
|
}
|
|
|
|
|
|
2011-10-30 14:10:24 +00:00
|
|
|
namespace detail {
|
|
|
|
|
template<std::size_t I, typename T>
|
|
|
|
|
struct tuple_element_impl;
|
|
|
|
|
template<typename Head, typename... Tail>
|
|
|
|
|
struct tuple_element_impl<0, sprout::tuples::tuple<Head, Tail...> > {
|
|
|
|
|
public:
|
|
|
|
|
typedef Head type;
|
|
|
|
|
};
|
|
|
|
|
template<std::size_t I, typename Head, typename... Tail>
|
|
|
|
|
struct tuple_element_impl<I, sprout::tuples::tuple<Head, Tail...> >
|
2011-10-31 08:31:03 +00:00
|
|
|
: public sprout::tuples::detail::tuple_element_impl<I - 1, sprout::tuples::tuple<Tail...> >
|
2011-10-30 14:10:24 +00:00
|
|
|
{};
|
|
|
|
|
} // namespace detail
|
2011-10-31 08:31:03 +00:00
|
|
|
} // namespace tuples
|
|
|
|
|
|
|
|
|
|
using sprout::tuples::tuple;
|
|
|
|
|
using sprout::tuples::ignore;
|
|
|
|
|
using sprout::tuples::make_tuple;
|
|
|
|
|
using sprout::tuples::forward_as_tuple;
|
|
|
|
|
using sprout::tuples::tie;
|
2011-10-31 11:10:07 +00:00
|
|
|
using sprout::tuples::swap;
|
2011-10-31 08:31:03 +00:00
|
|
|
} // namespace sprout
|
|
|
|
|
|
|
|
|
|
namespace std {
|
|
|
|
|
//
|
|
|
|
|
// tuple_size
|
|
|
|
|
//
|
|
|
|
|
template<typename... Types>
|
|
|
|
|
struct tuple_size<sprout::tuples::tuple<Types...> >
|
|
|
|
|
: public std::integral_constant<std::size_t, sizeof...(Types)>
|
|
|
|
|
{};
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// tuple_element
|
|
|
|
|
//
|
|
|
|
|
template<std::size_t I, typename... Types>
|
|
|
|
|
struct tuple_element<I, sprout::tuples::tuple<Types...> >
|
|
|
|
|
: public sprout::tuples::detail::tuple_element_impl<I, sprout::tuples::tuple<Types...> >
|
|
|
|
|
{};
|
|
|
|
|
} // namespace std
|
|
|
|
|
|
|
|
|
|
namespace sprout {
|
|
|
|
|
namespace tuples {
|
|
|
|
|
//
|
|
|
|
|
// tuple_size
|
|
|
|
|
//
|
|
|
|
|
template<typename T>
|
|
|
|
|
struct tuple_size
|
|
|
|
|
: public std::tuple_size<T>
|
|
|
|
|
{};
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// tuple_element
|
|
|
|
|
//
|
|
|
|
|
template<std::size_t I, typename T>
|
|
|
|
|
struct tuple_element
|
|
|
|
|
: public std::tuple_element<I, T>
|
2011-10-30 14:10:24 +00:00
|
|
|
{};
|
|
|
|
|
|
2011-10-31 08:31:03 +00:00
|
|
|
//
|
|
|
|
|
// get
|
|
|
|
|
//
|
|
|
|
|
template<std::size_t I, typename T>
|
|
|
|
|
SPROUT_CONSTEXPR auto get(
|
|
|
|
|
T&& t
|
2011-10-31 11:10:07 +00:00
|
|
|
) SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(std::get<I>(sprout::forward<T>(t))))
|
|
|
|
|
-> decltype(std::get<I>(sprout::forward<T>(t)))
|
2011-10-31 08:31:03 +00:00
|
|
|
{
|
|
|
|
|
return std::get<I>(sprout::forward<T>(t));
|
|
|
|
|
}
|
2011-10-30 14:10:24 +00:00
|
|
|
//
|
|
|
|
|
// get
|
|
|
|
|
//
|
|
|
|
|
namespace detail {
|
|
|
|
|
template<std::size_t I, typename Head, typename... Tail>
|
|
|
|
|
SPROUT_CONSTEXPR typename std::add_lvalue_reference<Head>::type get_helper(
|
|
|
|
|
sprout::tuples::detail::tuple_impl<I, Head, Tail...>& t
|
|
|
|
|
) SPROUT_NOEXCEPT
|
|
|
|
|
{
|
|
|
|
|
return sprout::tuples::detail::tuple_impl<I, Head, Tail...>::head(t);
|
|
|
|
|
}
|
|
|
|
|
template<std::size_t I, typename Head, typename... Tail>
|
|
|
|
|
SPROUT_CONSTEXPR typename std::add_lvalue_reference<typename std::add_const<Head>::type>::type get_helper(
|
|
|
|
|
sprout::tuples::detail::tuple_impl<I, Head, Tail...> const& t
|
|
|
|
|
) SPROUT_NOEXCEPT
|
|
|
|
|
{
|
|
|
|
|
return sprout::tuples::detail::tuple_impl<I, Head, Tail...>::head(t);
|
|
|
|
|
}
|
|
|
|
|
} // namespace detail
|
|
|
|
|
template<std::size_t I, typename... Types>
|
|
|
|
|
SPROUT_CONSTEXPR typename sprout::tuples::tuple_element<I, sprout::tuples::tuple<Types...> >::type& get(
|
2011-10-31 08:31:03 +00:00
|
|
|
sprout::tuples::tuple<Types...>& t
|
2011-10-30 14:10:24 +00:00
|
|
|
) SPROUT_NOEXCEPT
|
|
|
|
|
{
|
|
|
|
|
return sprout::tuples::detail::get_helper<I>(t);
|
|
|
|
|
}
|
|
|
|
|
template<std::size_t I, typename... Types>
|
|
|
|
|
SPROUT_CONSTEXPR typename sprout::tuples::tuple_element<I, sprout::tuples::tuple<Types...> >::type&& get(
|
2011-10-31 08:31:03 +00:00
|
|
|
sprout::tuples::tuple<Types...>&& t
|
2011-10-30 14:10:24 +00:00
|
|
|
) SPROUT_NOEXCEPT
|
|
|
|
|
{
|
2011-10-31 08:31:03 +00:00
|
|
|
return sprout::forward<typename sprout::tuples::tuple_element<I, sprout::tuples::tuple<Types...> >::type&&>(
|
2011-10-30 14:10:24 +00:00
|
|
|
sprout::tuples::get<I>(t)
|
|
|
|
|
);
|
|
|
|
|
}
|
|
|
|
|
template<std::size_t I, typename... Types>
|
|
|
|
|
SPROUT_CONSTEXPR typename sprout::tuples::tuple_element<I, sprout::tuples::tuple<Types...> >::type const& get(
|
2011-10-31 08:31:03 +00:00
|
|
|
sprout::tuples::tuple<Types...> const& t
|
2011-10-30 14:10:24 +00:00
|
|
|
) SPROUT_NOEXCEPT
|
|
|
|
|
{
|
|
|
|
|
return sprout::tuples::detail::get_helper<I>(t);
|
|
|
|
|
}
|
|
|
|
|
} // namespace tuples
|
|
|
|
|
|
|
|
|
|
using sprout::tuples::tuple_size;
|
|
|
|
|
using sprout::tuples::tuple_element;
|
|
|
|
|
using sprout::tuples::get;
|
|
|
|
|
} // namespace sprout
|
|
|
|
|
|
|
|
|
|
#endif // #ifndef SPROUT_TUPLE_TUPLE_HPP
|
