[Emacs-diffs] Changes to emacs/lisp/subr.el,v

[Kim F. Storm]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Changes by:     Kim F. Storm <kfstorm>  07/03/18 00:44:24

Index: subr.el
===================================================================
RCS file: /cvsroot/emacs/emacs/lisp/subr.el,v
retrieving revision 1.546
retrieving revision 1.547
diff -u -b -r1.546 -r1.547
--- subr.el     9 Feb 2007 23:09:16 -0000       1.546
+++ subr.el     18 Mar 2007 00:44:24 -0000      1.547
@@ -99,12 +99,20 @@
              (list 'setq listname (list 'cdr listname)))))
 
 (defmacro when (cond &rest body)
-  "If COND yields non-nil, do BODY, else return nil."
+  "If COND yields non-nil, do BODY, else return nil.
+When COND yields non-nil, eval BODY forms sequentially and return
+value of last one, or nil if there are none.
+
+\(fn COND BODY ...)"
   (declare (indent 1) (debug t))
   (list 'if cond (cons 'progn body)))
 
 (defmacro unless (cond &rest body)
-  "If COND yields nil, do BODY, else return nil."
+  "If COND yields nil, do BODY, else return nil.
+When COND yields nil, eval BODY forms sequentially and return
+value of last one, or nil if there are none.
+
+\(fn COND BODY ...)"
   (declare (indent 1) (debug t))
   (cons 'if (cons cond (cons nil body))))