Function: math-comp-is-null

math-comp-is-null is a byte-compiled function defined in calccomp.el.gz.

Signature

(math-comp-is-null C)

Source Code

;; Defined in /usr/src/emacs/lisp/calc/calccomp.el.gz
(defun math-comp-is-null (c)
  (cond ((stringp c) (= (length c) 0))
	((memq (car c) '(horiz subscr supscr))
	 (while (and (setq c (cdr c))
		     (math-comp-is-null (car c))))
	 (null c))
	((eq (car c) 'tag)
	 (math-comp-is-null (nth 2 c)))
	((memq (car c) '(set break)) t)))