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sprout/utility/pack.hpp 追加

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bolero-MURAKAMI 2012-01-09 21:32:51 +09:00
parent 9dbdf452d9
commit a110b0ad0f
4 changed files with 116 additions and 2 deletions
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10
sprout/utility/enabler.hpp Normal file
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#ifndef SPROUT_UTILITY_ENABLER_HPP
#define SPROUT_UTILITY_ENABLER_HPP
#include <sprout/config.hpp>
namespace sprout {
extern void* enabler;
} // namespace sprout
#endif // #ifndef SPROUT_UTILITY_ENABLER_HPP

65
sprout/utility/pack.hpp Normal file
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#ifndef SPROUT_UTILITY_PACK_HPP
#define SPROUT_UTILITY_PACK_HPP
#include <cstddef>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/enabler.hpp>
namespace sprout {
//
// tppack_at
//
namespace detail {
template<std::size_t N, typename Head, typename... Tail>
struct tppack_at_impl {
public:
typedef typename sprout::detail::tppack_at_impl<N - 1, Tail...>::type type;
};
template<typename Head, typename... Tail>
struct tppack_at_impl<0, Head, Tail...> {
public:
typedef Head type;
};
} // namespace detail
template<std::size_t N, typename... Args>
struct tppack_at
: public sprout::detail::tppack_at_impl<N, Args...>
{};
//
// fppack_at
//
namespace detail {
template<
std::size_t N,
typename R,
typename Head,
typename... Tail,
typename std::enable_if<N == 0>::type*& = sprout::enabler
>
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 std::enable_if<N != 0>::type*& = sprout::enabler
>
SPROUT_CONSTEXPR R fppack_at_impl(Head&& head, Tail&&... tail) {
return sprout::detail::fppack_at_impl<N - 1, R>(sprout::forward<Tail>(tail)...);
}
} // namespace detail
template<std::size_t N, typename... Args>
SPROUT_CONSTEXPR typename sprout::tppack_at<N, Args&&...>::type fppack_at(Args&&... args) {
return sprout::detail::fppack_at_impl<
N,
typename sprout::tppack_at<N, Args&&...>::type
>(sprout::forward<Args>(args)...);
}
} // namespace sprout
#endif // #ifndef SPROUT_UTILITY_PACK_HPP

39
testspr/typeinfo.hpp Normal file
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#ifndef TESTSPR_TYPEINFO_HPP
#define TESTSPR_TYPEINFO_HPP
#if defined(__GNUC__)
# include <cstdlib>
#endif
#include <string>
#include <typeinfo>
#if defined(__GNUC__)
# include <cxxabi.h>
#endif
namespace testspr {
//
// typename_of
//
#if defined(__GNUC__)
namespace detail {
std::string gcc_demangle(char const* mangled) {
int status;
char* demangled = abi::__cxa_demangle(mangled, 0, 0, &status);
std::string result(demangled);
std::free(demangled);
return result;
}
} // namespace detail
template<typename T>
std::string typename_of() {
return testspr::detail::gcc_demangle(typeid(T).name());
}
#else
template<typename T>
std::string typename_of() {
return std::string(typeid(T).name());
}
#endif
} // namespace testspr
#endif // #ifndef TESTSPR_TYPEINFO_HPP