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add enable_make_indexes

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This commit is contained in:
bolero-MURAKAMI 2013-04-06 13:06:51 +09:00
parent bc2e3e245b
commit 410c369a6a
100 changed files with 237 additions and 156 deletions
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40
sprout/utility/pack.hpp
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@ -12,25 +12,33 @@ namespace sprout {
// tppack_at
//
namespace detail {
template<std::size_t N, typename Head, typename... Tail>
template<std::size_t I, typename Head, typename... Tail>
struct tppack_at_impl_1
: public sprout::detail::tppack_at_impl_1<N - 1, Tail...>
: 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 N, typename... Args>
template<std::size_t I, typename... Args>
struct tppack_at_impl
: public sprout::detail::tppack_at_impl_1<N, Args...>
: public sprout::detail::tppack_at_impl_1<I, Args...>
{
static_assert(N < sizeof...(Args), "N < sizeof...(Args)");
static_assert(I < sizeof...(Args), "I < sizeof...(Args)");
};
} // namespace detail
template<std::size_t N, typename... Args>
template<std::size_t I, typename... Args>
struct tppack_at
: public sprout::detail::tppack_at_impl<N, Args...>
: public sprout::detail::tppack_at_impl<I, Args...>
{};
//
// tppack_c_at
//
template<std::size_t I, typename T, T... Args>
struct tppack_c_at
: public sprout::tppack_at<I, std::integral_constant<T, Args>...>::type
{};
//
@ -38,28 +46,28 @@ namespace sprout {
//
namespace detail {
template<
std::size_t N, typename R, typename Head, typename... Tail,
typename sprout::enabler_if<N == 0>::type = sprout::enabler
std::size_t I, typename R, typename Head, typename... Tail,
typename sprout::enabler_if<I == 0>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR R
fppack_at_impl(Head&& head, Tail&&... tail) {
return sprout::forward<Head>(head);
}
template<
std::size_t N, typename R, typename Head, typename... Tail,
typename sprout::enabler_if<N != 0>::type = sprout::enabler
std::size_t I, typename R, typename Head, typename... Tail,
typename sprout::enabler_if<I != 0>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR R
fppack_at_impl(Head&& head, Tail&&... tail) {
return sprout::detail::fppack_at_impl<N - 1, R>(sprout::forward<Tail>(tail)...);
return sprout::detail::fppack_at_impl<I - 1, R>(sprout::forward<Tail>(tail)...);
}
} // namespace detail
template<std::size_t N, typename... Args>
inline SPROUT_CONSTEXPR typename sprout::tppack_at<N, Args&&...>::type
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<
N,
typename sprout::tppack_at<N, Args&&...>::type
I,
typename sprout::tppack_at<I, Args&&...>::type
>(sprout::forward<Args>(args)...);
}
} // namespace sprout