Special variables have dynamic extent

Call: (gamma 555)

555

7

562

7

555

(defun delta (delta-arg)

(print delta-arg)

(print *w*)

(print *v*))

(defvar *v* 3)

(defvar *w* 19)

(defun gamma (*v*) ;will shadow the outer value

(let ((*w* 7)) ;will shadow the outer value

(print *v*)

(print *w*)

(delta (+ *v* *w*))))

Previous slide

Next slide

Back to first slide

View graphic version