ip_eval_real     7455 ext/tk/tcltklib.c     return ip_eval_real(q->interp, q->str, q->len);
ip_eval_real     7516 ext/tk/tcltklib.c         ret = ip_eval_real(q->interp, q->str, q->len);
ip_eval_real     7602 ext/tk/tcltklib.c         result = ip_eval_real(self, RSTRING_PTR(str), RSTRING_LENINT(str));