X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Flist.lisp;h=36adc0e9f4b647a870e951f7d4598a346dcc0d70;hb=25d3ce6406a74dca652ff4bb27f025986626958a;hp=dabd201a15c0169ab4d77296d800b80b9b14db3a;hpb=227c815341a7956c3bfff6b93f406c0d7b8cefb7;p=jscl.git

diff --git a/src/list.lisp b/src/list.lisp
index dabd201..36adc0e 100644
--- a/src/list.lisp
+++ b/src/list.lisp
@@ -13,6 +13,8 @@
 ;; You should have received a copy of the GNU General Public License
 ;; along with JSCL.  If not, see <http://www.gnu.org/licenses/>.
 
+(/debug "loading list.lisp!")
+
 ;;;; Various list functions
 
 (defun cons (x y) (cons x y))
@@ -194,10 +196,29 @@
                (rplaca tail (cdar tail)))
              (collect (apply func elems))))))))
 
+(defun mapn (func list)
+  (with-collect
+    (while list
+      (collect (funcall func list))
+      (setq list (cdr list)))))
+
+(defun maplist (func list &rest lists)
+  (let ((lists (cons list lists)))
+    (with-collect
+      (block loop
+        (loop
+           (let ((elems (mapn #'car lists)))
+             (do ((tail lists (cdr tail)))
+                 ((null tail))
+               (when (null (car tail)) (return-from loop))
+               (rplaca tail (cdar tail)))
+             (collect (apply func elems))))))))
+
 (defun mapc (func &rest lists)
-  (do* ((elems (map1 #'car lists) (map1 #'car lists-rest))
-        (lists-rest (map1 #'cdr lists) (map1 #'cdr lists-rest)))
-       ((dolist (x elems) (when (null x) (return t)))
+  (do* ((tails lists (map1 #'cdr tails))
+        (elems (map1 #'car tails)
+               (map1 #'car tails)))
+       ((dolist (x tails) (when (null x) (return t)))
         (car lists))
     (apply func elems)))