Undo previous change.

1 files changed, 26 insertions, 0 deletions

diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el
index 70069d77eaf..af2d31cf216 100644
--- a/lisp/emacs-lisp/cl-macs.el
+++ b/lisp/emacs-lisp/cl-macs.el
@@ -1122,6 +1122,32 @@ Format is: (do* ((VAR INIT [STEP])...) (END-TEST [RESULT...]) BODY...)"
                                                  (apply 'append sets)))))))
                (or (cdr endtest) '(nil)))))
 
+(defmacro dolist (spec &rest body)
+  "(dolist (VAR LIST [RESULT]) BODY...): loop over a list.
+Evaluate BODY with VAR bound to each `car' from LIST, in turn.
+Then evaluate RESULT to get return value, default nil."
+  (let ((temp (gensym "--dolist-temp--")))
+    (list 'block nil
+          (list* 'let (list (list temp (nth 1 spec)) (car spec))
+                 (list* 'while temp (list 'setq (car spec) (list 'car temp))
+                        (append body (list (list 'setq temp
+                                                 (list 'cdr temp)))))
+                 (if (cdr (cdr spec))
+                     (cons (list 'setq (car spec) nil) (cdr (cdr spec)))
+                   '(nil))))))
+
+(defmacro dotimes (spec &rest body)
+  "(dotimes (VAR COUNT [RESULT]) BODY...): loop a certain number of times.
+Evaluate BODY with VAR bound to successive integers from 0, inclusive,
+to COUNT, exclusive.  Then evaluate RESULT to get return value, default
+nil."
+  (let ((temp (gensym "--dotimes-temp--")))
+    (list 'block nil
+          (list* 'let (list (list temp (nth 1 spec)) (list (car spec) 0))
+                 (list* 'while (list '< (car spec) temp)
+                        (append body (list (list 'incf (car spec)))))
+                 (or (cdr (cdr spec)) '(nil))))))
+
 (defmacro do-symbols (spec &rest body)
   "(dosymbols (VAR [OBARRAY [RESULT]]) BODY...): loop over all symbols.
 Evaluate BODY with VAR bound to each interned symbol, or to each symbol