Summary:
This silences the two -Wimplicit-fallthrough warnings clang finds in
ItaniumDemangle.h in libc++abi.
Clang does not have a GNU attribute spelling for this attribute, so this
is necessary.
I will commit the same change to the LLVM demangler soon.
Reviewers: EricWF, ldionne
Subscribers: christof, erik.pilkington, cfe-commits
Differential Revision: https://reviews.llvm.org/D53985
llvm-svn: 345870
# define _LIBCPP_DIAGNOSE_ERROR(...)
#endif
-#if __has_attribute(fallthough) || _GNUC_VER >= 700
// Use a function like macro to imply that it must be followed by a semicolon
+#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
+# define _LIBCPP_FALLTHROUGH() [[fallthrough]]
+#elif __has_cpp_attribute(clang::fallthrough)
+# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]]
+#elif __has_attribute(fallthough) || _GNUC_VER >= 700
# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
#else
# define _LIBCPP_FALLTHROUGH() ((void)0)
SoFar = make<ExpandedSpecialSubstitution>(SSK);
if (!SoFar)
return nullptr;
+ break;
default:
break;
}