<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:12.0pt">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I’ve been using EOPL2 to teach Programming Languages for a dozen years now,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">and am having a great deal of trouble just trying to use the legacy code like define-datatype.scm,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">sllgen.scm and the various early interpreters (e.g. 3-1.scm). I’m only interested in about the first 100 pages<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">of the book, and have been so happy with how it has worked to have students build the interpreter up through<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">chapter 3.6 that I have been reluctant to change to EOPL3e and use all of the Racket syntax. I would much rather<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">stick with Scheme. Has anyone done anything similar, and give me advice on how to easily continue using this code?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Here is an example of a current problem I’m having:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Language: Pretty Big; memory limit: 128 MB.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">> (load "initdr.scm")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Loading set-up-cmsc460.scm.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Requiring library pretty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Requiring library trace.scm.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Requiring library macro.scm.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Requiring r5rs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Loading define-datatype.scm.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">define-datatype.scm version J3 2001-08-26 10:18<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Loading sllgen.scm.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">. c:/Documents and Settings\krebsbak\My Documents\CS460\Code\sllgen.scm:1252:8: module: duplicate definition for identifier in: sllgen:action-preference-list<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Thank you!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal">Kurt Krebsbach<o:p></o:p></p>
<p class="MsoNormal">Associate Professor of Computer Science<o:p></o:p></p>
<p class="MsoNormal">Lawrence University<o:p></o:p></p>
<p class="MsoNormal">Appleton, WI 54911<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>