From: Clint Hyde
Subject: RE: Generating parsers in Lisp
Date: 
Message-ID: <3pj12c$ake@info-server.bbn.com>
an alternative is to use a heavily modified readtable. this can do all
sorts of wild things, but is not easy to produce.

I've worked with teeny changes to readtables and found them not easy.

 -- clint