diff options
Diffstat (limited to 'lisp/subr.el')
| -rw-r--r-- | lisp/subr.el | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lisp/subr.el b/lisp/subr.el index a2f560461eb..5c890eefa29 100644 --- a/lisp/subr.el +++ b/lisp/subr.el @@ -3072,8 +3072,15 @@ See also `with-temp-file' and `with-output-to-string'." "Execute BODY, pretending it does not modify the buffer. If BODY performs real modifications to the buffer's text, other than cosmetic ones, undo data may become corrupted. -Typically used around modifications of text-properties which do not really -affect the buffer's content." + +This macro will run BODY normally, but doesn't count its buffer +modifications as being buffer modifications. This affects things +like buffer-modified-p, checking whether the file is locked by +someone else, running buffer modification hooks, and other things +of that nature. + +Typically used around modifications of text-properties which do +not really affect the buffer's content." (declare (debug t) (indent 0)) (let ((modified (make-symbol "modified"))) `(let* ((,modified (buffer-modified-p)) |