/[emacs]/emacs/lisp/subr.el
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revision 1.308 by miles, Fri Jun 14 05:48:51 2002 UTC revision 1.309 by miles, Fri Jun 14 06:15:00 2002 UTC
# Line 89  LISTNAME must be a symbol." Line 89  LISTNAME must be a symbol."
89  LISTNAME must be a symbol whose value is a list.  LISTNAME must be a symbol whose value is a list.
90  If the value is nil, `pop' returns nil but does not actually  If the value is nil, `pop' returns nil but does not actually
91  change the list."  change the list."
92    (list 'prog1 (list 'car listname)    (list 'car
93          (list 'setq listname (list 'cdr listname))))          (list 'prog1 listname
94                  (list 'setq listname (list 'cdr listname)))))
95    
96  (defmacro when (cond &rest body)  (defmacro when (cond &rest body)
97    "If COND yields non-nil, do BODY, else return nil."    "If COND yields non-nil, do BODY, else return nil."

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