Am Thu, 27 Oct 2011 16:06:52 +0800 schrieb Daniel Greenhoe:
> If I can do this conversion from the command line, why can't fontspec
> handle it correctly? That is, before fontspec tries to interpret a
> sequence beginning with "\" as a command, why can't it first check to
> see if the sequence is up for replacement by a font mapping?
Because (Xe)tex has to execute commands first. Things like
\section{A}, \usepackage{fontspec}, \texbf{abc}, \title{My title},
\; has to be handled come long before the TeX-engine can even start
to think about the actual font.
But you can use another char than "\" as "start a command char",
e.g. $ (which naturally than will not longer work for math):
\documentclass{article}
\usepackage{fontspec}
\begin{document}
\begingroup
\catcode`\$=0
\catcode`\\=12
\section{abc} \:
$section{xyz}
$endgroup %back to normal
\section{blub}
\end{document}
--
Ulrike Fischer
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