Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113086 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/exception b/include/exception
index f02b10f..69b76cc 100644
--- a/include/exception
+++ b/include/exception
@@ -179,16 +179,16 @@
 
 template <class _Tp>
 void
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 throw_with_nested /*[[noreturn]]*/ (_Tp&& __t, typename enable_if<
                   is_class<typename remove_reference<_Tp>::type>::value &&
                   !is_base_of<nested_exception, typename remove_reference<_Tp>::type>::value
                                     >::type* = 0)
-#else  // _LIBCPP_MOVE
+#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 throw_with_nested (_Tp& __t, typename enable_if<
                   is_class<_Tp>::value && !is_base_of<nested_exception, _Tp>::value
                                     >::type* = 0)
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 {
 #ifndef _LIBCPP_NO_EXCEPTIONS
     throw __nested<typename remove_reference<_Tp>::type>(_STD::forward<_Tp>(__t));
@@ -197,16 +197,16 @@
 
 template <class _Tp>
 void
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 throw_with_nested /*[[noreturn]]*/ (_Tp&& __t, typename enable_if<
                   !is_class<typename remove_reference<_Tp>::type>::value ||
                   is_base_of<nested_exception, typename remove_reference<_Tp>::type>::value
                                     >::type* = 0)
-#else  // _LIBCPP_MOVE
+#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 throw_with_nested (_Tp& __t, typename enable_if<
                   !is_class<_Tp>::value || is_base_of<nested_exception, _Tp>::value
                                     >::type* = 0)
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 {
 #ifndef _LIBCPP_NO_EXCEPTIONS
     throw _STD::forward<_Tp>(__t);