Re: [PATCH v3 4/8] doc: give headings for the two and three dot notations

From: Jakub Narębski <jnareb@gmail.com>
Date: Jul 19, 2016, 16:03 UTC
Message-ID: <578E4F4A.2020708@gmail.com>
In-Reply-To: <D94C739D5C334AFE9E5E8410147899EA@PhilipOakley>

W dniu 2016-07-13 o 00:11, Philip Oakley pisze:

> From: "Junio C Hamano" <gitster@pobox.com>

[...]

Show 7 quoted lines

>> I actually think this is a good place to have them described.
>> <rev>^<number> is about specifying a single commit.  These two are
>> not that (you can say HEAD^2^@ but you cannot say HEAD^@^2, for
>> example).
> 
> These two are special cases I'm not too familiar with, particularly
> the r1^! which I didn't understand from the description...

<rev>^@ is all parents of <rev>, that is

  <rev>^@  ==  <rev>^1 <rev>^2 ... <rev>^<n>

where <n> is number of parents commit <rev> has.

<rev>^! is (if standalone) a single commit range, only <rev> revision. It is actually

  <rev>^!  ==  ( <rev> --not <rev>^@ )

that is, reachable from <rev> but not from any of its parents. Parentheses here denote that `--not` does not affect the rest of rev-like parameters.

Hope that helps

-- 
Jakub Narębski