#endif
#if __has_feature(underlying_type)
-# define _LIBCXX_UNDERLYING_TYPE(T) __underlying_type(T)
+# define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T)
+#endif
+
+#if __has_feature(is_literal)
+# define _LIBCPP_IS_LITERAL(T) __is_literal(T)
#endif
// Inline namespaces are available in Clang regardless of C++ dialect.
#define _LIBCPP_NORETURN __attribute__((noreturn))
+#if _GNUC_VER >= 407
+#define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T)
+#define _LIBCPP_IS_LITERAL(T) __is_literal_type(T)
+#endif
+
#if !__EXCEPTIONS
#define _LIBCPP_NO_EXCEPTIONS
#endif
// is_literal_type;
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_literal_type
-#if __has_feature(is_literal)
- : public integral_constant<bool, __is_literal(_Tp)>
+#ifdef _LIBCPP_IS_LITERAL
+ : public integral_constant<bool, _LIBCPP_IS_LITERAL(_Tp)>
#else
: integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value ||
is_reference<typename remove_all_extents<_Tp>::type>::value>
#endif // __has_feature(cxx_noexcept)
-#ifdef _LIBCXX_UNDERLYING_TYPE
+#ifdef _LIBCPP_UNDERLYING_TYPE
template <class _Tp>
struct underlying_type
{
- typedef _LIBCXX_UNDERLYING_TYPE(_Tp) type;
+ typedef _LIBCPP_UNDERLYING_TYPE(_Tp) type;
};
#if _LIBCPP_STD_VER > 11
template <class _Tp> using underlying_type_t = typename underlying_type<_Tp>::type;
#endif
-#else // _LIBCXX_UNDERLYING_TYPE
+#else // _LIBCPP_UNDERLYING_TYPE
template <class _Tp, bool _Support = false>
struct underlying_type
"libc++ does not know how to use it.");
};
-#endif // _LIBCXX_UNDERLYING_TYPE
+#endif // _LIBCPP_UNDERLYING_TYPE
#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE