Re: [RFC] [PATCH 0/5] Implement 'prior' commit object links (and

> Junio C Hamano wrote:
> 
>> Jakub Narebski <jnareb@gmail.com> writes:
>> 
>>>  * "prior" - heads that represent topic branch merges
>> 
>> This is not any different from usual "parent" at all (but you
>> have to think about it a bit to realize it).
> [cut]
> Thanks for an explanation.
> 
> I would say that "prior" is not THAT different from usual "parent",
> rather than it is not ANY different.
> 
> My doubts about recording previous head of a "union" (pu-like) branch
> is that for merge (e.g. 'pu' to 'next', cherrypick to/from 'pu', 'pu'
> rebase) is that for merge algorithm all parents are equivalent, with
> eventual exception of first which can be treated special ('ours').