CONCAT_HDR         82 gc/cord/cordbscs.c #define IS_CONCATENATION(s)  (((CordRep *)s)->generic.header == CONCAT_HDR)
CONCAT_HDR        216 gc/cord/cordbscs.c     	result->header = CONCAT_HDR;
CONCAT_HDR        257 gc/cord/cordbscs.c     	result->header = CONCAT_HDR;