Path: utzoo!attcan!uunet!mcsun!ukc!strath-cs!cs.glasgow.ac.uk!johnsson
From: johnsson@cs.glasgow.ac.uk (Dr. T. Johnsson)
Newsgroups: comp.text.tex
Subject: Recognizing keywords etc using TeX
Message-ID: <5421@vanuata.cs.glasgow.ac.uk>
Date: 7 Jun 90 08:29:55 GMT
Organization: Computing Sci, Glasgow Univ, Scotland
Lines: 26

How would one design macros or environments to prettyprint computer
programs? The tricky bit (presumably!) would be to recognize keywords
and other special symbols of a programming language, and output them
in \bf or as math, instead of some default treatment.  For instance,

\beginpascal
if iffy > 42 then msg("ugly!");
\endpascal

would produce something like
   
{\bf if} {\it iffy\/} $>$ 42 {\bf then} {\it msg\/}$($``{\tt ugly!}''$)$$;$

I would also like to be able to treat the character backslash
as a symbol; for instance,

\beginlambda
\x.\y.(y (\z.z) x)
\endlambda

would produce something like

$\lambda$x.$\lambda$y.$($y $($$\lambda$z.z$)$ x$)$

Thanks! 
Thomas Johnsson (cs.glasgow.ac.uk)