Path: utzoo!attcan!uunet!snorkelwacker!usc!samsung!munnari.oz.au!murdu!viccol!dougcc
From: dougcc@csv.viccol.edu.au (Douglas Miller)
Newsgroups: comp.text.tex
Subject: Re: Verbatim environment in macro argument
Message-ID: <6353.26a6267a@csv.viccol.edu.au>
Date: 20 Jul 90 02:30:33 GMT
References: <MERNST.90Jul9133647@emu.lcs.mit.edu> <MERNST.90Jul10132554@wren.lcs.mit.edu>
Distribution: comp
Organization: Computer Services, Victoria College, Melbourne
Lines: 10

In article <MERNST.90Jul10132554@wren.lcs.mit.edu>, mernst@theory.lcs.mit.edu (Michael Ernst) writes:
> However, I'm stubborn.  On page 39, paragraph one, of the TeXbook, Knuth
> says, ``(2) Once a category code has been attached to a character token,
> the attachment is permanent.''  Is there any way to get around this?  For
> instance, can I somehow re-scan a piece of text that has already been
> tokenized to re-classify each of the tokens, perhaps giving them new
> catcodes?

It can be done.  You have to write the text to an auxiliary file, and
read it in again.