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-rw-r--r--lisp/emacs-lisp/ring.el4
1 files changed, 4 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/ring.el b/lisp/emacs-lisp/ring.el
index 2b2039f9d15..e8b92a532fa 100644
--- a/lisp/emacs-lisp/ring.el
+++ b/lisp/emacs-lisp/ring.el
@@ -42,6 +42,8 @@
;;; Code:
+(eval-when-compile (require 'cl-lib))
+
;;; User Functions:
;;;###autoload
@@ -51,6 +53,8 @@
(consp (cdr x)) (integerp (cadr x))
(vectorp (cddr x))))
+(cl-deftype ring () '(satisfies ring-p))
+
;;;###autoload
(defun make-ring (size)
"Make a ring that can contain SIZE elements."