gmm-utils.el (gmm-labels): Use cl-labels if available

[gnus] / lisp / gmm-utils.el

diff --git a/lisp/gmm-utils.el b/lisp/gmm-utils.el
index 3d504d7..9be6c66 100644 (file)
--- a/lisp/gmm-utils.el
+++ b/lisp/gmm-utils.el
@@ -435,46 +435,14 @@ coding-system."
           (fmakunbound (car orig)))))))
 (put 'gmm-flet 'lisp-indent-function 1)
 
-;; An alist of original function names and those unique names.
-(defvar gmm-labels-environment)
-
-(defun gmm-labels-expand (form)
-  "Expand funcalls in FORM according to `gmm-labels-environment'.
-This function is a subroutine that `gmm-labels' uses to convert any
-`(FN ...)' and #'FN elements in FORM into `(funcall UN ...)' and `UN'
-respectively if `(FN . UN)' is listed in `gmm-labels-environment'."
-  (cond ((or (not (consp form)) (memq (car form) '(\` backquote quote)))
-        form)
-       ((assq (car form) gmm-labels-environment)
-        `(funcall ,(cdr (assq (car form) gmm-labels-environment))
-                  ,@(mapcar #'gmm-labels-expand (cdr form))))
-       ((eq (car form) 'function)
-        (if (and (assq (cadr form) gmm-labels-environment)
-                 (not (cddr form)))
-            (cdr (assq (cadr form) gmm-labels-environment))
-          (cons 'function (mapcar #'gmm-labels-expand (cdr form)))))
-       (t
-        (mapcar #'gmm-labels-expand form))))
-
 (defmacro gmm-labels (bindings &rest body)
   "Make temporary function bindings.
 The lexical scoping is handled via `lexical-let' rather than relying
 on `lexical-binding'.
 
 \(fn ((FUNC ARGLIST BODY...) ...) FORM...)"
-  (let (gmm-labels-environment def defs)
-    (dolist (binding bindings)
-      (push (cons (car binding)
-                 (make-symbol (format "--gmm-%s--" (car binding))))
-           gmm-labels-environment))
-    `(lexical-let ,(mapcar #'cdr gmm-labels-environment)
-       (setq ,@(dolist (env gmm-labels-environment (nreverse defs))
-                (setq def (cdr (assq (car env) bindings)))
-                (push (cdr env) defs)
-                (push `(lambda ,(car def)
-                         ,@(mapcar #'gmm-labels-expand (cdr def)))
-                      defs)))
-       ,@(mapcar #'gmm-labels-expand body))))
+  `(,(progn (require 'cl) (if (fboundp 'cl-labels) 'cl-labels 'labels))
+    ,bindings ,@body))
 (put 'gmm-labels 'lisp-indent-function 1)
 
 (provide 'gmm-utils)