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fix tuple_element order

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This commit is contained in:
bolero-MURAKAMI 2013-11-29 22:21:07 +09:00
parent 403e83eaf0
commit c9610b5ae5
9 changed files with 70 additions and 63 deletions
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46
sprout/utility/pack.hpp
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@ -11,45 +11,29 @@
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/type/type_tuple.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
//
// tppack_at
// pack_element
//
namespace detail {
template<std::size_t I, typename Head, typename... Tail>
struct tppack_at_impl_1
: public sprout::detail::tppack_at_impl_1<I - 1, Tail...>
{};
template<typename Head, typename... Tail>
struct tppack_at_impl_1<0, Head, Tail...> {
public:
typedef Head type;
};
template<std::size_t I, typename... Args>
struct tppack_at_impl
: public sprout::detail::tppack_at_impl_1<I, Args...>
{
static_assert(I < sizeof...(Args), "I < sizeof...(Args)");
};
} // namespace detail
template<std::size_t I, typename... Args>
struct tppack_at
: public sprout::detail::tppack_at_impl<I, Args...>
struct pack_element
: public std::tuple_element<I, sprout::types::type_tuple<Args...> >
{};
//
// tppack_c_at
// pack_element_c
//
template<std::size_t I, typename T, T... Args>
struct tppack_c_at
: public sprout::tppack_at<I, sprout::integral_constant<T, Args>...>::type
struct pack_element_c
: public sprout::pack_element<I, sprout::integral_constant<T, Args>...>::type
{};
//
// fppack_at
// pack_get
//
namespace detail {
template<
@ -57,7 +41,7 @@ namespace sprout {
typename sprout::enabler_if<I == 0>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR R
fppack_at_impl(Head&& head, Tail&&...) {
pack_get_impl(Head&& head, Tail&&...) {
return sprout::forward<Head>(head);
}
template<
@ -65,16 +49,16 @@ namespace sprout {
typename sprout::enabler_if<I != 0>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR R
fppack_at_impl(Head&&, Tail&&... tail) {
return sprout::detail::fppack_at_impl<I - 1, R>(sprout::forward<Tail>(tail)...);
pack_get_impl(Head&&, Tail&&... tail) {
return sprout::detail::pack_get_impl<I - 1, R>(sprout::forward<Tail>(tail)...);
}
} // namespace detail
template<std::size_t I, typename... Args>
inline SPROUT_CONSTEXPR typename sprout::tppack_at<I, Args&&...>::type
fppack_at(Args&&... args) {
return sprout::detail::fppack_at_impl<
inline SPROUT_CONSTEXPR typename sprout::pack_element<I, Args&&...>::type
pack_get(Args&&... args) {
return sprout::detail::pack_get_impl<
I,
typename sprout::tppack_at<I, Args&&...>::type
typename sprout::pack_element<I, Args&&...>::type
>(sprout::forward<Args>(args)...);
}
} // namespace sprout