From: Ramkumar Ramachandra <artagnon@gmail.com>
Date: Tue, 30 Apr 2013 20:37:32 GMT
Subject: Re: [PATCH] Add new @ shortcut for HEAD
Message-ID: <CALkWK0k9Gix4_x-VKry2a-hZL-j0ROGGLiiYV9NyE+1A-VxQOA@mail.gmail.com>
In-Reply-To: <7v4nendbry.fsf@alter.siamese.dyndns.org>

Junio C Hamano wrote:
> Ramkumar Ramachandra <artagnon@gmail.com> writes:
>
>> In other words: the sequence "@" is short for "HEAD".
>
> That is saying a very different thing.  master@{4.days} is not short
> for masterHEAD{4.days}.

I meant after ^, ~, @{} have been peeled off.  Just before resolving
what's left.

> As design and semantics look still fuzzy (the primary one I am not
> sure about is if @ is a ref or just a revision), even though the
> desire to have _something_ seem to be popular, I am not particulary
> interested in looking at an alternative patch. I want to see the
> right semantics first.

I wanted to explain it through an implementation, but okay.  In your
proposal, @ is a special ref: it behaves like a ref in a rev spec, but
cannot be update-ref'ed or symbolic-ref'ed.  This is probably the best
we can do, unless we want to emulate a full ref (I'm not sure how
useful the .git/@ override will even be).