Re: Redisplay hook

[Eli Zaretskii <eliz@gnu.org>]

> Cc: monnier@iro.umontreal.ca, emacs-devel@gnu.org
> From: Clément Pit--Claudel <clement.pit@gmail.com>
> Date: Mon, 4 Jul 2016 12:14:02 -0400
> 
> > The upshot of all this is that IMO if we decide to provide the
> > post-redisplay hook, we will need to figure out all of these use
> > cases, and perhaps provide separate hooks for some of them; otherwise,
> > I'm quite sure that soon enough someone files a bug report or posts a
> > message here complaining that the existing hooks don't work for
> > them...
> 
> Yes, that makes a lot of sense.  On the other hand, we don't need to implement all of this at once.  As long as we're fairly sure that we understand the use cases well, we might be able to implement the parts that there is immediate demand for, leaving room for future extensions as needed. 

I'd rather we implemented at least a few of the more important ones.
That's because by the time the issues are clear, the person who worked
on that knows enough to implement a few important hooks.  If we only
implement one, then the knowledge collected during the process goes
away, and the next person will have to do it all from scratch.