Re: Documentation of tab-bar-show and friends

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: emacs-devel@gnu.org
> Date: Mon, 06 Sep 2021 18:24:15 +0300
> 
> >   *** The tab bar is frame-local when 'tab-bar-show' is a number.
> >   Show/hide the tab bar independently for each frame, according to the
> >   value of 'tab-bar-show'.
> >
> > What does it mean "frame-local" in this case?  Does it mean one should
> > use a frame parameter called tab-bar-show?  Or does it mean something
> > else?
> 
> This means it affects each frame separately.

How does it do that?  It's a good-faith question: I don't understand
how you make that happen, except by using frame parameters.

> > Next, the above says "a number", but the doc string of tab-bar-show,
> > the defcustom forms, and the manual only describe one value: 1.
> > However, the code does:
> >
> >    ((natnump tab-bar-show)
> >     (if (> (length (funcall tab-bar-tabs-function frame)) tab-bar-show) 1 
> > 0))))
> >
> > So tab-bar-show can be meaningfully set to a number other than 1.
> > This is undocumented, for some reason.  Is that intentional?
> 
> Probably no one would want to use a number other than 1.

I don't think it's reasonable to second guess what the users would
like doing.