[OS X TeX] conditional text

Axel E. Retif axel.retif at mac.com
Fri Feb 2 19:07:45 EST 2007

On Feb 2, 2007, at 17:53 , Alain Schremmer wrote:

> I would like to have multi-paragraphs optional text in a file,  
> namely text that I can comment/uncomment with a \boolean{Optional}  
> at the top of the file.
> I thought of creating a newenvironment like
>    \newenvironment{OptionalText}%
>    {\ifthenelse{\boolean{Optional}}{}{\renewcommand{\par}{\%}}
>    {\ifthenelse{\boolean{Optional}}{}{\par}}
> but I have not been able to carry this out.

Recently, there was a discussion on TeXhax mailing list about this,  
with interesting solutions; for example, Hartmut Henkel suggested:

> \documentclass{article}
> \newif\ifdocA
> \expandafter\def\csname doc-a\endcsname{\docAtrue}
> \expandafter\def\csname doc-b\endcsname{\docAfalse}
> \csname\jobname\endcsname
> \begin{document}
> This is the  \ifdocA original \else alternate \fi version.
> \end{document}

and E. Krishnan recommended the optional package (by Donald  
Arseneau). I would try this.



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