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Remove traits detection mechanism

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LeonineKing1199
2021-12-08 14:04:04 -08:00
parent fefb6ad4c4
commit 089d2db104
1 changed files with 0 additions and 72 deletions
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72
include/boost/unordered/detail/implementation.hpp
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@ -844,78 +844,6 @@ namespace boost {
}
}
////////////////////////////////////////////////////////////////////////////
// TRAITS TYPE DETECTION MECHANISM
//
// Used to implement traits that use a type if present, or a
// default otherwise.
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1400
#define BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(tname) \
template <typename Tp, typename Default> struct default_type_##tname \
{ \
\
template <typename X> \
static choice1::type test(choice1, typename X::tname* = 0); \
\
template <typename X> static choice2::type test(choice2, void* = 0); \
\
struct DefaultWrap \
{ \
typedef Default tname; \
}; \
\
enum \
{ \
value = (1 == sizeof(test<Tp>(choose()))) \
}; \
\
typedef typename boost::detail::if_true<value>::BOOST_NESTED_TEMPLATE \
then<Tp, DefaultWrap>::type::tname type; \
}
#else
namespace boost {
namespace unordered {
namespace detail {
template <typename T, typename T2> struct sfinae : T2
{
};
}
}
}
#define BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(tname) \
template <typename Tp, typename Default> struct default_type_##tname \
{ \
\
template <typename X> \
static typename boost::unordered::detail::sfinae<typename X::tname, \
choice1>::type test(choice1); \
\
template <typename X> static choice2::type test(choice2); \
\
struct DefaultWrap \
{ \
typedef Default tname; \
}; \
\
enum \
{ \
value = (1 == sizeof(test<Tp>(choose()))) \
}; \
\
typedef typename boost::detail::if_true<value>::BOOST_NESTED_TEMPLATE \
then<Tp, DefaultWrap>::type::tname type; \
}
#endif
#define BOOST_UNORDERED_DEFAULT_TYPE(T, tname, arg) \
typename default_type_##tname<T, arg>::type
////////////////////////////////////////////////////////////////////////////////
//
// Allocator traits