;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Nov 2002
;;;;
-;;;; $Id: math.lisp,v 1.2 2003/04/28 16:07:42 kevin Exp $
+;;;; $Id: math.lisp,v 1.4 2003/06/06 21:59:29 kevin Exp $
;;;;
;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
;;;; *************************************************************************
-(in-package :kmrcl)
+(in-package #:kmrcl)
(defun deriv (f dx)
#'(lambda (x)
(funcall (deriv #'sin 1d-8) x))
;;; (sin^ pi)
+
+(defmacro ensure-integer (obj)
+ "Ensure object is an integer. If it is a string, then parse it"
+ `(if (stringp ,obj)
+ (parse-integer ,obj)
+ ,obj))