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fix tuple_element: support SFINAE-friendly

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This commit is contained in:
bolero-MURAKAMI 2014-05-29 00:25:37 +09:00
parent f42e92b448
commit c15de6136b
64 changed files with 984 additions and 113 deletions
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19
sprout/uuid/tuple.hpp
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@ -8,6 +8,7 @@
#ifndef SPROUT_UUID_TUPLE_HPP
#define SPROUT_UUID_TUPLE_HPP
#include <type_traits>
#include <tuple>
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
@ -15,6 +16,8 @@
#include <sprout/tuple/tuple/get.hpp>
#include <sprout/uuid/uuid.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/identity.hpp>
#include <sprout/detail/nil_base.hpp>
namespace sprout {
//
@ -48,21 +51,17 @@ namespace std {
// tuple_size
//
template<>
struct tuple_size<sprout::uuids::uuid> {
public:
typedef sprout::integral_constant<std::size_t, 16> type;
SPROUT_STATIC_CONSTEXPR std::size_t value = type::value;
};
struct tuple_size<sprout::uuids::uuid>
: public sprout::integral_constant<std::size_t, 16>
{};
//
// tuple_element
//
template<std::size_t I>
struct tuple_element<I, sprout::uuids::uuid> {
static_assert(I < 16, "tuple_element<>: index out of range");
public:
typedef sprout::uuids::uuid::value_type type;
};
struct tuple_element<I, sprout::uuids::uuid>
: public std::conditional<(I < 16), sprout::identity<sprout::uuids::uuid::value_type>, sprout::detail::nil_base>::type
{};
#if defined(__clang__)
# pragma clang diagnostic pop
#endif