X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=lists.lisp;h=229bc91d6cc40d73bece0377d419db1d56a83ee4;hb=e2450e52a0813b8583395d7ac88f24e896f46e13;hp=35e74ba3482236cf8dd4f01cfc6948de66e273bd;hpb=eb3a19183eef0273cb4bec74259f98802fb141f0;p=kmrcl.git

diff --git a/lists.lisp b/lists.lisp
index 35e74ba..229bc91 100644
--- a/lists.lisp
+++ b/lists.lisp
@@ -42,13 +42,15 @@
     (unless (find elem l1)
       (setq l1 (append l1 (list elem))))))
 
-(defun remove-from-tree-if (pred tree)
+(defun remove-from-tree-if (pred tree &optional atom-processor)
   "Strip from tree of atoms that satistify predicate"
   (if (atom tree)
       (unless (funcall pred tree)
-	tree)
-    (let ((car-strip (remove-from-tree-if pred (car tree)))
-	  (cdr-strip (remove-from-tree-if pred (cdr tree))))
+	(if atom-processor
+	    (funcall atom-processor tree)
+	  tree))
+    (let ((car-strip (remove-from-tree-if pred (car tree) atom-processor))
+	  (cdr-strip (remove-from-tree-if pred (cdr tree) atom-processor)))
       (cond
        ((and car-strip (atom (cadr tree)) (null cdr-strip))
 	(list car-strip))