Re: [RFC/PATCH 04/11] ref-filter: add 'ifexists' atom

> Junio C Hamano <gitster@pobox.com> writes:
>
>> Junio C Hamano <gitster@pobox.com> writes:
>>
>>>> Couldn't think of a better replacer, any suggestions would be welcome :)
>>>
>>> See below.
>>> ...
>>> One way to do all of the above is ...
>>
>> Note that is just "one way", not the only or not necessarily the
>> best.  It certainly is not the easiest, I think.
>>
>>     %(if:atom)...%(endif)
>>
>> might be easier to implement.
>
> And I find it easier to read or write too. Nested parenthesis in a
> format string make them really tricky. That removes the need for
> escaping since the content of the if/endif is a format string like the
> others, it can use the same escaping rules (IIRC, %% to escape a %).