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sprout/tuple.hpp 追加

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bolero-MURAKAMI 2011-10-30 23:10:24 +09:00
parent 2168f05433
commit e87ac1049d
3 changed files with 528 additions and 0 deletions

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#ifndef SPROUT_TUPLE_HPP
#define SPROUT_TUPLE_HPP
#include <sprout/config.hpp>
#include <sprout/tuple/tuple.hpp>
#include <sprout/tuple/tuple_comparison.hpp>
#endif // #ifndef SPROUT_TUPLE_HPP

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

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#ifndef SPROUT_TUPLE_TUPLE_COMPARISON_HPP
#define SPROUT_TUPLE_TUPLE_COMPARISON_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/tuple/tuple.hpp>
namespace sprout {
namespace tuples {
//
// operator==
// operator<
// operator!=
// operator>
// operator>=
// operator<=
//
namespace detail {
template<std::size_t CheckEqualSize, std::size_t I, std::size_t J, typename T, typename U>
struct tuple_compare;
template<std::size_t I, typename T, typename U>
struct tuple_compare<0, I, I, T, U> {
public:
static SPROUT_CONSTEXPR bool eq(T const&, U const&) {
return true;
}
static SPROUT_CONSTEXPR bool less(T const&, U const&) {
return false;
}
};
template<std::size_t I, std::size_t J, typename T, typename U>
struct tuple_compare<0, I, J, T, U> {
public:
static SPROUT_CONSTEXPR bool eq(T const& t, U const& u) {
return (sprout::tuples::get<I>(t) == sprout::tuples::get<I>(u)
&& sprout::tuples::detail::tuple_compare<0, I + 1, J, T, U>::eq(t, u))
;
}
static SPROUT_CONSTEXPR bool less(T const& t, U const& u) {
return (sprout::tuples::get<I>(t) < sprout::tuples::get<I>(u))
|| (!(sprout::tuples::get<I>(u) < sprout::tuples::get<I>(t))
&& sprout::tuples::detail::tuple_compare<0, I + 1, J, T, U>::less(t, u)
)
;
}
};
} // namespace detail
template<typename... TTypes, typename... UTypes>
bool SPROUT_CONSTEXPR inline operator==(
sprout::tuples::tuple<TTypes...> const& lhs,
sprout::tuples::tuple<UTypes...> const& rhs
)
{
typedef sprout::tuples::tuple<TTypes...> T;
typedef sprout::tuples::tuple<UTypes...> U;
return sprout::tuples::detail::tuple_compare<
sprout::tuples::tuple_size<T>::value - sprout::tuples::tuple_size<U>::value,
0,
sprout::tuples::tuple_size<T>::value,
T,
U
>::eq(lhs, rhs);
}
template<typename... TTypes, typename... UTypes>
bool SPROUT_CONSTEXPR inline operator<(
sprout::tuples::tuple<TTypes...> const& lhs,
sprout::tuples::tuple<UTypes...> const& rhs
)
{
typedef sprout::tuples::tuple<TTypes...> T;
typedef sprout::tuples::tuple<UTypes...> U;
return sprout::tuples::detail::tuple_compare<
sprout::tuples::tuple_size<T>::value - sprout::tuples::tuple_size<U>::value,
0,
sprout::tuples::tuple_size<T>::value,
T,
U
>::less(lhs, rhs);
}
template<typename... TTypes, typename... UTypes>
bool SPROUT_CONSTEXPR inline operator!=(
sprout::tuples::tuple<TTypes...> const& lhs,
sprout::tuples::tuple<UTypes...> const& rhs
)
{
return !(lhs == rhs);
}
template<typename... TTypes, typename... UTypes>
bool SPROUT_CONSTEXPR inline operator>(
sprout::tuples::tuple<TTypes...> const& lhs,
sprout::tuples::tuple<UTypes...> const& rhs
)
{
return rhs < lhs;
}
template<typename... TTypes, typename... UTypes>
bool SPROUT_CONSTEXPR inline operator<=(
sprout::tuples::tuple<TTypes...> const& lhs,
sprout::tuples::tuple<UTypes...> const& rhs
)
{
return !(rhs < lhs);
}
template<typename... TTypes, typename... UTypes>
bool SPROUT_CONSTEXPR inline operator>=(
sprout::tuples::tuple<TTypes...> const& lhs,
sprout::tuples::tuple<UTypes...> const& rhs
)
{
return !(lhs < rhs);
}
} // namespace tuples
} // namespace sprout
#endif // #ifndef SPROUT_TUPLE_TUPLE_COMPARISON_HPP