[latexrefman-discuss] \protect, Mysterious error about missing closing round bracket

[Vincent Belaïche]

Two more things:

1)  the other example (with `\(...\)' in the section
    argument also work fine for me

2)  using $...$ instead of \protect\(...\protect\) is an alternative
    fix for this sort of problem, shouldn't we mention it ?

  Vincent.



> Hello,
> 
> In node \protect you have this example:
> 
> --8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
> In this example the @code{\caption} command gives a mysterious error
> about an extra curly brace.  Fix the problem by preceding each
> @code{\raisebox} command with @code{\protect}.
> 
> @example
> \begin at domain.hid@}
>   ...
>   \caption at domain.hid headquarters of A\raisebox at domain.hid@}@{C@}@}
> \end at domain.hid@}
> @end example
> --8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----
> 
> However with my LaTeX distro this issue was solved, there is no (no
> longer w.r.t. when this example was provided) such mysterious error.
> 
> I know that with time, more and more standard commands are made robust,
> and that is a good thing. So giving an example using only standard
> commands is sooner or later bound to fail.
> 
> Any suggestions ?
> 
> I propose to change the example to some hand-made stuff like this (the
> silly \MyFragileCmd make é from e and does not change its argument
> otherwise). If you remove the \protect that will break.
> 
> --8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
> \documentclass{article}
> \makeatletter
> \newcommand*\MyFragileCmd[1]{%
> \def\@tempa{#1}\def\@tempb{e}\ifx\@tempa\@tempb
> \'e\else #1\fi
> }
> \makeatother
> \begin{document}
> \listoffigures
> \begin{figure}\centering
>   \begin{picture}(40,40)
>     \put(20,20){\circle{40}}
>   \end{picture}
> \caption{Company headquarters of La Capon\protect\MyFragileCmd
>            e\protect\MyFragileCmd ale}
> \end{figure}
> \end{document}
> --8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----
> 
> VBR,
> 	Vincent
>