<div dir="ltr"><div>Seem to have found a package, I am not sure its the same one as I originally found though :-</div><div> </div><div> <a href="http://www.ctan.org/tex-archive/support/rail">http://www.ctan.org/tex-archive/support/rail</a></div>
<div> </div><div>It uses a lex and yacc based C frontend and a TeX backend.</div><div> </div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 27 April 2013 16:41, Aaron Gray <span dir="ltr"><<a href="mailto:aaronngray.lists@gmail.com" target="_blank">aaronngray.lists@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>I came across a TeX library for doing Grammar Rail Road diagrams is in the original PASCAL manual.</div>
<div> </div><div>I cannot seem to find my link to this anymore.</div><div> </div><div>Hope you can help,</div><span class="HOEnZb"><font color="#888888">
<div> </div><div>Aaron</div><div> </div></font></span></div>
</blockquote></div><br></div>