From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 25 Oct 2017 01:26:44 GMT
Subject: Re: [WIP PATCH] diff: add option to ignore whitespaces for move detection only
Message-ID: <xmqqo9owj9uz.fsf@gitster.mtv.corp.google.com>
In-Reply-To: <xmqqshe8j9we.fsf@gitster.mtv.corp.google.com>

Junio C Hamano <gitster@pobox.com> writes:

> Brandon Williams <bmwill@google.com> writes:
>
>> One simple idea would be to convert the single 'flag' into various bit
>> fields themselves, that way if you need to add a new flag you would just
>> make a new bit field.  I'm unaware of any downsides of doing so (though
>> i may be missing something) but doing so would probably cause a bit of
>> code churn.
>
> The reason why people want to have their own bit in the flags word
> is because they want to use DIFF_OPT_{SET,CLR,TST,TOUCHED} but they
> do not want to do the work to extend them beyond a single word.  
>
> I think it is doable by making everything a 1-bit wide bitfield
> without affecting existing users.

... but the "touched" thing may be harder---I haven't thought it
through.