OCH_
case OCH_:
case OCH_:
case OCH_: /* find the right one, if any */
case OCH_: /* mark the first two branches */
case OCH_:
INSERT(OCH_, conc); /* offset is wrong */
INSERT(OCH_, pos); /* offset slightly wrong */
INSERT(OCH_, start); /* offset is wrong... */
INSERT(OCH_, start);
case OCH_:
if (OP(*(s-opnd)) != OOR1 && OP(*(s-opnd)) != OCH_)