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From: piet@cs.ruu.nl (Piet van Oostrum)
Newsgroups: comp.text.tex
Subject: Re: LaTeX: How to include \end{document} in a macro?
Message-ID: <1991Apr17.091436.19094@cs.ruu.nl>
Date: 17 Apr 91 09:14:36 GMT
References: <29996@cs.yale.edu>
Sender: piet@cs.ruu.nl (Piet van Oostrum)
Reply-To: piet@cs.ruu.nl (Piet van Oostrum)
Organization: Dept of Computer Science, Utrecht University, The Netherlands
Lines: 34
In-Reply-To: guzman-juan@cs.yale.edu (Juan Carlos Guzman)

>>>>> guzman-juan@cs.yale.edu (Juan Carlos Guzman) (JCG) writes:

JCG> I have defined the environment `file', which should work essentially
JCG> like `document', except that I can have nested file environments, in
JCG> which case the nested ones behave as noop.

JCG> The environment works fine, but when it's time to close the
JCG> document, LaTeX complains:

JCG>    % latex myfile
JCG>    LaTeX error.  See LaTeX manual for explanation.
JCG> 		 Type  H <return>  for immediate help.
JCG>    ! \begin{file} ended by \end{document}.
JCG>    ...
JCG>    l.123 \end{file}

JCG>    ?

Apparently \begin{document} and \end{document} are hard to use in another
environment. However, the following works (but strictly speaking it is an
undocumented feature):

  \newenvironment{file}[1]
    {\ifnum\value{FileCounter}=0\document\fi
     \addtocounter{FileCounter}{1}}%
    {\addtocounter{FileCounter}{-1}
     \ifnum\value{FileCounter}=0\enddocument\fi}

Note: The % must also be given to get rid of a space token.
-- 
Piet* van Oostrum, Dept of Computer Science, Utrecht University,
Padualaan 14, P.O. Box 80.089, 3508 TB Utrecht, The Netherlands.
Telephone: +31 30 531806   Uucp:   uunet!mcsun!ruuinf!piet
Telefax:   +31 30 513791   Internet:  piet@cs.ruu.nl   (*`Pete')