ip_eval_real     6659 ext/tk/tcltklib.c     return ip_eval_real(q->interp, q->str, q->len);
ip_eval_real     6725 ext/tk/tcltklib.c         ret = ip_eval_real(q->interp, q->str, q->len);
ip_eval_real     6809 ext/tk/tcltklib.c         result = ip_eval_real(self, RSTRING_PTR(str), RSTRING_LEN(str));