[tex-live] Ignoring portion of LaTeX code; the \par problem.

Zdenek Wagner zdenek.wagner at gmail.com
Mon Apr 5 15:39:09 CEST 2010


2010/4/4 Michaël Cadilhac <michael at cadilhac.name>:
>  Hi there everyone,
>
>  My goal today is to write a command that would include another TeX
> file, but not its document environment.  For instance, I would want to
> use it like:
>
How about to try xcomment.sty?

> document.tex:
> \documentclass{article}
> % Lots of includes and configurations.
> \begin{document}
>  Text.
> \end{document}
>
> appendix.tex:
> \usepreambleof{document.tex}
> \begin{document}
>  Other text.
> \end{document}
>
>  The goal there is to be able to move the appendix close to any
> document.tex, and the appendix would take the form of the document.
>
>  My first tries were focused on just ignoring code.  But while I had no
> succeed in defining \document=\iffalse and \enddocument=\fi, for
> whatever reason, I might have found some bugs on my way, seemingly
> linked to TeXlive.
>
> 1- The \par problem.  I do understand that a \par may break the system
> by which arguments are parsed.  But how come this gives me an error:
>
> \def\ignore#1{}
> \ignore{\string\par}
>
> or even
>
> \ignore{\let\par=\relax}
>
> 2- The ^L matter.  Let's use the \ignore command again, but without
> \par's.
> \def\ignore#1{}
> \ignore{one
>
>  two}
>
> Of course, the paragraph ended before \ignore was complete.  I then ask
> for lines and spaces to be obeyed with \obeylines\obeyspaces.  Now,
> let's add a ^L character (C-q C-l in Emacs), which is used, e.g., as a
> marker in a file for Emacs.
>
> \obeylines\obeyspaces
> \def\ignore#1{}
> \ignore{one
>
>   two}
>
> -> "Forbidden control sequence found while scanning use of \ignore."
>
> If I add a \def^^L{}, everything works fine.  I'm just wondering why the
> \obey* are not enough for that job.
>
>
> Have a nice day.
>
> --
> Michaël `Micha' Cadilhac (LITQ, U. de Montréal) -- http://michael.cadilhac.name
>        ||     Emacs is GNU, Emacs is free
>        ||     For more information,
>        ||     Type C-h C-p
>
>



-- 
Zdeněk Wagner
http://hroch486.icpf.cas.cz/wagner/
http://icebearsoft.euweb.cz



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