Re: [PATCH v4 05/10] userdiff: add and use for_each_userdiff_driver()

> On Thu, Mar 25, 2021 at 02:26:21AM +0100, Ævar Arnfjörð Bjarmason wrote:
>
>> >>     We could add a ifuncname and xifuncname or whatever for it I guess,
>> >>     but currently the ICASE behavior in the C code is magic.
>> >
>> > Good point. IMHO that is something we should consider fixing
>> > independently. It was a mistake to add builtins that couldn't be
>> > replicated via the config (though I notice it happened quite a while
>> > ago, and nobody seems to have cared, so perhaps it isn't that
>> > important).
>> 
>> I'm conspiring to eventually optimistically replace these ERE patterns
>> with PCRE if we build with that at some point.
>> 
>> Then you could just prefix your pattern with (?i) here in this and other
>> things that want icase...
>
> I really like PCRE myself, but is it portable/common enough for us to
> start using it for baked-in funcname patterns? I sort of assumed there
> were exotic platforms where libpcre wouldn't build (or at least it would
> be inconvenient or uncommon to have it). And it would be nice to degrade
> those gracefully (or at least better than "I guess you don't get any
> builtin funcnames. Tough luck").