Re: [PATCH] branch: allow "-" as a short-hand for "previous branch"

> On Mon, Aug 8, 2022 at 4:47 PM Junio C Hamano<gitster@pobox.com>  wrote:
>
> > The "-d" and "-D" options being the more detructive ones among other
> > operation modes of the command, I am not sure if this change is even
> > desirable.  Even if it were, the implementation to special case a
> > single argument case like this ...
> >
> > > +     if ((argc == 1) && !strcmp(argv[0], "-")) {
> > > +             argv[0] = "@{-1}";
> > > +     }
> > ... (by the way, we don't write braces around a single statement
> > block) would invite cries from confused users why none of these ...
> >
> >   $ git branch -m - new-name
> >   $ git branch new-branch -
> >   $ git branch --set-upstream-to=<upstream> -
> >
> > work and "-" works only for deletion.
>
> Agree. But the approach is to ease the deletion of previous branch,
> aligned with merge:
>
> $ git merge - -
> merge: - - not something we can merge
> $ git merge - old-branch
> merge: - - not something we can merge