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-rw-r--r--lisp/emacs-lisp/cl-preloaded.el11
1 files changed, 11 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/cl-preloaded.el b/lisp/emacs-lisp/cl-preloaded.el
index 6aa45526d84..93713f506d2 100644
--- a/lisp/emacs-lisp/cl-preloaded.el
+++ b/lisp/emacs-lisp/cl-preloaded.el
@@ -305,6 +305,17 @@ supertypes from the most specific to least specific.")
(cl-assert (cl--class-p (cl--find-class 'cl-structure-class)))
(cl-assert (cl--class-p (cl--find-class 'cl-structure-object)))
+(defun cl--class-allparents (class)
+ (let ((parents ())
+ (classes (list class)))
+ ;; BFS precedence. FIXME: Use a topological sort.
+ (while (let ((class (pop classes)))
+ (cl-pushnew (cl--class-name class) parents)
+ (setq classes
+ (append classes
+ (cl--class-parents class)))))
+ (nreverse parents)))
+
;; Make sure functions defined with cl-defsubst can be inlined even in
;; packages which do not require CL. We don't put an autoload cookie
;; directly on that function, since those cookies only go to cl-loaddefs.