What is a "tip"?

[Matt Mackall]

On Tue, 2011-12-06 at 11:01 -0600, Kevin Bullock wrote:
> On Dec 5, 2011, at 7:57 PM, Jordi Gutiérrez Hermoso wrote:
> 
> > I think this is a documentation bug. Consider,
> > 
> >    jordi at Iris:~$ hg help tip
> >    [...]
> >        The tip revision (usually just called the tip) is the
> >        changeset most recently added to the repository (and therefore
> >        the most recently changed head).
> > 
> > as opposed to
> > 
> >    jordi at Iris:~$ hg help update
> >    [...]
> >        Update the repository's working directory to the specified
> >        changeset. If no changeset is specified, update to the tip of
> >        the current named branch.
> 
> I think our recent usage of terminology would have this as "head of
> the current named branch". Talking about a "branch tip" is something I
> try not to do because it's confusing.

A branch can have many heads, but when you say 'hg update foo', the
revision chosen is the most recently added, highest numbered head of
that branch. In other words, it's exactly analogous to our normal usage
of tip, except restricted to the branch.

-- 
Mathematics is the supreme nostalgia of our time.