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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
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