[Emacs-diffs] master c8b8636 1/3: Allow setf of buffer-modified-p without argument (Bug#21201)

[Noam Postavsky]

branch: master
commit c8b86362d45a07e0aec0041cade551c3c663ea8c
Author: Noam Postavsky <address@hidden>
Commit: Noam Postavsky <address@hidden>

    Allow setf of buffer-modified-p without argument (Bug#21201)
    
    * lisp/emacs-lisp/cl-lib.el (setf buffer-modified-p): Take current
    buffer if optional argument BUF is not passed.
---
 lisp/emacs-lisp/cl-lib.el | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lisp/emacs-lisp/cl-lib.el b/lisp/emacs-lisp/cl-lib.el
index d7e72ce..592235d 100644
--- a/lisp/emacs-lisp/cl-lib.el
+++ b/lisp/emacs-lisp/cl-lib.el
@@ -531,8 +531,9 @@ If ALIST is non-nil, the new pairs are prepended to it."
 ;; Some more Emacs-related place types.
 (gv-define-simple-setter buffer-file-name set-visited-file-name t)
 (gv-define-setter buffer-modified-p (flag &optional buf)
-  `(with-current-buffer ,buf
-     (set-buffer-modified-p ,flag)))
+  (macroexp-let2 nil buffer `(or ,buf (current-buffer))
+    `(with-current-buffer ,buffer
+       (set-buffer-modified-p ,flag))))
 (gv-define-simple-setter buffer-name rename-buffer t)
 (gv-define-setter buffer-string (store)
   `(insert (prog1 ,store (erase-buffer))))