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Date:         Thu, 19 Aug 2010 16:30:03 +0930
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From: Will Robertson <wspr81@GMAIL.COM>
Subject: Re: xparse: environment*
To: LATEX-L@listserv.uni-heidelberg.de
In-Reply-To:  <4C6CCD25.5080805@gmx.de>
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Status: R

On 19/08/2010, at 3:50 PM, Arno Trautmann wrote:

> This time a simple question: I want to define a document environment
> that offers a star alternative. Trying to say
> 
> \DeclareDocumentEnvironment{myenv}{s}{
> }
> {}
> 
> gives me an undefined environment in my document. Am I doing something
> wrong here? If so, is there another way to achieve \begin{myenv*} in the
> document?

I guess for this sort of thing we haven't thought of a better interface beyond

\DeclareDocumentEnvironment{myenv*}{}{
  ...
}{
  ...
}

Nothing really springs to mind as being more convenient... any suggestions?

In your case above, you'd be defining an environment that looked like

    \begin{myenv}*...\end{myenv}

which is obviously not what you want (and a little bit weird).

-- Will