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-rw-r--r--lisp/emacs-lisp/cl-macs.el6
1 files changed, 5 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el
index 9a2eee325f4..f0ac3c562a1 100644
--- a/lisp/emacs-lisp/cl-macs.el
+++ b/lisp/emacs-lisp/cl-macs.el
@@ -222,7 +222,11 @@ its argument list allows full Common Lisp conventions."
(defconst lambda-list-keywords
'(&optional &rest &key &allow-other-keys &aux &whole &body &environment))
-(defvar cl-macro-environment nil)
+(defvar cl-macro-environment nil
+ "Keep the list of currently active macros.
+It is a list of elements of the form either:
+- (SYMBOL . FUNCTION) where FUNCTION is the macro expansion function.
+- (SYMBOL-NAME . EXPANSION) where SYMBOL-NAME is the name of a symbol macro.")
(defvar bind-block) (defvar bind-defs) (defvar bind-enquote)
(defvar bind-inits) (defvar bind-lets) (defvar bind-forms)