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Message-ID:  <4E954A90.8080103@latex-project.org>
Date:         Wed, 12 Oct 2011 10:06:40 +0200
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From: Frank Mittelbach <frank.mittelbach@LATEX-PROJECT.ORG>
Subject: Re: Strings, and regular expressions
To: LATEX-L@listserv.uni-heidelberg.de
In-Reply-To:  <4E952E50.3020004@morningstar2.co.uk>
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Status: R

Am 12.10.2011 08:06, schrieb Joseph Wright:
>>
>>> Rather than \regex_extract_once:nnN, I would probably call it
>>> \regex_extract_first:nnN.
>>
>> Not sure about that. We already have \tl_replace_(once|all):Nnn, which
>> is what prompted me to use once there. @Joseph (and others), would
>> \tl_replace_first:Nnn make more sense than _once?
>
> For the moment, go with 'once', and we can discuss separately whether it
> should be once/all or first/all in general. (We've only just changed
> this from having 'in' in the name, which has caused confusion enough!)

on first glance "first" feels more precise than once. But I guess this 
is not really true since it requires knowledge that processing is left 
to right. But personally I like "first" better.

Having said that I agree with Joseph that for now use "once" to keep 
common name structures.

frank