-#define ATTRIB(cname, name, type, val) \
- class(cname).type name; \
+#define ATTRIB(...) EVAL_ATTRIB(OVERLOAD_(ATTRIB, __VA_ARGS__))
+#define EVAL_ATTRIB(...) __VA_ARGS__
+#define ATTRIB_3(cname, name, type) INIT(cname) {} class(cname) .type name
+#define ATTRIB_4(cname, name, type, val) \
+ ATTRIB_3(cname, name, type); \