Re: C-x t N

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: Andreas Schwab <schwab@linux-m68k.org>,  emacs-devel@gnu.org
> Date: Thu, 09 Sep 2021 10:57:09 +0300
> 
> >> > Here's the problem: if index = 1 means "the first tab", then -1 which
> >> > "counts from the end" is not the last one, it's one before that.
> >>
> >> If indexes are one-based, then -1 is the last.
> >
> > It's the last existing one, but we are adding one more.  And adding a
> > tab at index IDX means all those at IDX and after it move to the right
> > to free a slot for the new one.  But that's not what we do with tabs
> > in this case.
> 
> -1 defines the position that the moved tab will have after moving.

And that is the problem, see above.

I get it that you are unconvinced, and will stop arguing, but I still
think this is not a good semantics, if my opinion on these matters
means anything to you.