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Date:         Sun, 8 Aug 2010 14:50:36 +0200
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From: Arno Trautmann <Arno.Trautmann@GMX.DE>
Subject: Re: optional (#1:#2) with xparse
To: LATEX-L@listserv.uni-heidelberg.de
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Joseph Wright wrote:
> On 07/08/2010 14:57, Arno Trautmann wrote:
>> Hi all,
>>
>> I am looking for a way to define an environment that takes a range as =
an
>> optional argument. This should be given in the following way:
>>
>> \begin{environment}(15:5.23)
>>
>> with a default value, say (1:3). The two limits should then be parsed =
as
>> single arguments which are separated by the colon.
>> I am trying to do this with xparse and got some possible solutions wit=
h
>> the u and d argument type, but I didn=92t manage to get the parenthese=
s
>> optional. I guess what I need is some kind of an optional u argument =85=

>>
>> Does anyone have a suggestion how to easily implement these requests?
>>
>> cheers
>> Arno
>>
> Parse the argument first as a 'd', then use \SplitArgument to do the
> subsequent work:

Nice, I totally forgot about the \SplitArgument =85
Thanks for your quick answer, that works fine. But unfortunately it does
not solve my problem due to other reasons.

cheers
Arno


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