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unnamed-faq-73
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     To: Maurice Petrie <mpetrie@infoscigroup.com>
     Subject: Re: Lost flex .l file
     In-reply-to: Your message of Mon, 02 Feb 1998 14:10:01 PST.
     Date: Mon, 02 Feb 1998 11:15:12 PST
     From: Vern Paxson <vern>
     
     > I am curious as to
     > whether there is a simple way to backtrack from the generated source to
     > reproduce the lost list of tokens we are searching on.
     
     In theory, it's straight-forward to go from the DFA representation
     back to a regular-expression representation - the two are isomorphic.
     In practice, a huge headache, because you have to unpack all the tables
     back into a single DFA representation, and then write a program to munch
     on that and translate it into an RE.
     
     Sorry for the less-than-happy news ...
     
     		Vern