ASSIGN_EXPRESSION  121 create.c           exp = crb_alloc_expression(ASSIGN_EXPRESSION);
ASSIGN_EXPRESSION  174 eval.c             case ASSIGN_EXPRESSION:
ASSIGN_EXPRESSION  243 eval.c             case ASSIGN_EXPRESSION:
ASSIGN_EXPRESSION  592 eval.c             case ASSIGN_EXPRESSION:
ASSIGN_EXPRESSION  148 util.c             case ASSIGN_EXPRESSION:	/* FALLTHRU */