Please check out the revset feature

[Greg Ward]

On Mon, Jun 7, 2010 at 12:16 PM, Matt Mackall <mpm at selenic.com> wrote:
> Last week I pushed the revset feature to default. It's available
> wherever revision ranges were previously supported. It's quite complex
> and needs some testing. (And yes, there are currently no tests or docs!)

Cool!  This is a killer feature.

I just naively tried to do this:

  hg update 'p1(109360)'

which was rejected: presumably update doesn't accept revsets at all,
since it's nonsensical in general.  But there are certainly useful
revsets with only one member.  Would it be possible to make update
accept a query that evaluates to exactly one changeset, and barf
otherwise?

Greg