oleft             457 sys/tree.h     					struct type *oleft;		\
oleft             458 sys/tree.h     					if ((oleft = RB_LEFT(tmp, field)))\
oleft             459 sys/tree.h     						RB_COLOR(oleft, field) = RB_BLACK;\
oleft             461 sys/tree.h     					RB_ROTATE_RIGHT(head, tmp, oleft, field);\