Re: File changed during load

Lennart Borgman writes:

> drkm wrote:

>>Lennart Borgman writes:

>>>It would be nice if Emacs had some simple function for avoiding adding 
>>>to the undo, something like (save-undo ...).

>>  Something like this can be useful in this case, IMHO:

>>    (defmacro save-undo-list (&rest body)
>>      `(let ((buffer-undo-list buffer-undo-list))
>>         ,@body))

> There is a much more elaborate macro in nxml-util.el:

>      (defmacro nxml-with-unmodifying-text-property-changes (&rest body) ...)

> I can not say I understand that macro but I guess there is a reason for it?

  It's not the same thing.  The first inhibits adding to
'buffer-undo-list'.  The second inhibits setting the buffer
modified flag to T if it was NIL before EVAL'ing BODY.  Actually,
they don't inhibit anything; they restore the list (resp. the
flag) to its initial value.

  But I wonder if 'save-undo-list' is really useful.  IMHO it can
be just dangerous.

  BTW, I think the nXML macro above restore the buffer modified
flag to NIL even if the modifications were on text (for example),
not to the tprops.

--drkm



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