Fix http://llvm.org/bugs/show_bug.cgi?id=11428. Fix provided by Alberto Ganesh Barbati
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@145698 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config
index 0f6c77d..5e0db7c 100644
--- a/include/__config
+++ b/include/__config
@@ -160,6 +160,10 @@
#define _LIBCPP_NO_RTTI
#endif
+#if !(__has_feature(cxx_strong_enums))
+#define _LIBCPP_HAS_NO_STRONG_ENUMS
+#endif
+
#if !(__has_feature(cxx_decltype))
#define _LIBCPP_HAS_NO_DECLTYPE
#endif
@@ -223,6 +227,7 @@
#if __has_feature(objc_arc_weak)
#define _LIBCPP_HAS_OBJC_ARC_WEAK
+#define _LIBCPP_HAS_NO_STRONG_ENUMS
#endif
#if !(__has_feature(cxx_constexpr))
@@ -371,6 +376,18 @@
#define __has_feature(__x) 0
#endif
+#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
+#define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_VISIBLE x { enum _
+#define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
+ _ __v_; \
+ _LIBCPP_ALWAYS_INLINE x(_ __v) : __v_(__v) {} \
+ _LIBCPP_ALWAYS_INLINE operator int() const {return __v_;} \
+ };
+#else // _LIBCPP_HAS_NO_STRONG_ENUMS
+#define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_VISIBLE x
+#define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
+#endif // _LIBCPP_HAS_NO_STRONG_ENUMS
+
#if __APPLE__ || __FreeBSD__ || _WIN32
#define _LIBCPP_LOCALE__L_EXTENSIONS 1
#endif