[texhax] recursive \defs
Neal H. Walfield
neal at walfield.org
Thu Aug 16 13:07:23 CEST 2012
Hi,
I have a large \def that takes some parameters. I want to define a
convenience macro, which I use from my outer definition, and which
also takes parameters. Consider:
\documentclass{article}
\begin{document}
\def\foo#1{%
\def\bar#1{%
xxx #1 yyy%
}%
\bar{aaa #1 bbb}%
}
\foo{!}
\end{document}
When I compile this, I get:
! Use of \bar doesn't match its definition.
\foo #1->\def \bar #1{xxx #1 yyy}\bar {
aaa #1 bbb}
l.12 \foo{!}
This is because the #1 in the \bar definition is expanded to the value
of the argument passed to \foo. How do I escape the #1 in bar's
definition? What are good approaches to do this type of thing?
Thanks,
Neal
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