Re: On removing some obsolete code from subr and core

[Noam Postavsky]

On Mon, Nov 7, 2016 at 3:25 PM, Mark Oteiza <address@hidden> wrote:
> On 07/11/16 at 10:13pm, Eli Zaretskii wrote:
>> > Date: Mon, 7 Nov 2016 15:08:28 -0500
>> > From: Mark Oteiza <address@hidden>
>> > Cc: address@hidden
>> >
>> > > I meant what happens if we for some reason need to reinstate some of
>> > > them?
>> >
>> > Partially revert the commit I guess.
>>
>> Would it work to do in Lisp something like
>>
>>   (defvar default-FOO (default-value FOO))
>
> No, because default-FOO is tied to the default value of FOO, and
> manipulating default-FOO created this way would have no effect on FOO's
> default value.

It would be possible to implement the tieing together using the
watchpoint feature (I haven't finished it yet, but I plan to post
something by the end of this week).

https://lists.nongnu.org/archive/html/emacs-devel/2015-11/msg02454.html