[texhax] tabularx and titletoc/titlesec: harmful interaction? [workaround]

[Susan Dittmar]

Hi folks,

I still do not understand why the described problem arised, and in case
someone knows, I am still interested in an explanation.

Nonetheless using etoolbox and a macro instead of the counter I managed to
work around the problem (work-around appended for the archives). Btw, I
first used etoolbox's \numdef, which showed the same problem although
according to the docs it is a local definition!

	Susan

\documentclass{article}
\usepackage{tabularx}
\usepackage{etoolbox}

\makeatletter

\newcommand{\mysecdepth}{0}	% register to keep track of current section depth
\newenvironment*{mysection}{%
	\begingroup%
	\expandafter\numdef\expandafter\mysecdepth{\mysecdepth + 1}	% locally add 1 to register \mysecdepth
	\ifcase\value{mysecdepth}%
		\immediate\write16{mysection: counter mysecdepth has value 0! This can't happen!}%
		\expandafter\sectionI%
	\or\expandafter\section%
	\or\expandafter\subsection%
	\else%
		\immediate\write16{mysection: No more hierarchy levels!}%
		\expandafter\subsection%
	\fi%
}{%
	\par%
	\endgroup%
}%
\makeatother

\begin{document}

\begin{mysection}{first section}
	text of first section
	\begin{mysection}{first subsection of first section}
	text of first subsection of first section
	\end{mysection}
\end{mysection}

\begin{mysection}{second section}
	text of second section
\end{mysection}

\begin{mysection}{third section}
	text of third section

	\begin{tabularx}{\linewidth}{X}
	This is a tabularx \\
	just to show my problem.\\
	\end{tabularx}
\end{mysection}

\begin{mysection}{fourth section}
	text of fourth section, which falsely was chosen to
	be first subsection of section three, but now correctly
	seen as section four
\end{mysection}

\end{document}