Info Catalog flex: unnamed-faq-99 flex: FAQ flex: unnamed-faq-101

flex: unnamed-faq-100

 
 unnamed-faq-100
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      To: Martin Gallwey <gallweym@hyperion.moe.ul.ie>
      Subject: Re: Flex, and self referencing rules
      In-reply-to: Your message of Sun, 20 Feb 2000 01:01:21 PST.
      Date: Sat, 19 Feb 2000 18:33:16 PST
      From: Vern Paxson <vern>
      
      > However, I do not use unput anywhere. I do use self-referencing
      > rules like this:
      >
      > UnaryExpr               ({UnionExpr})|("-"{UnaryExpr})
      
      You can't do this - flex is *not* a parser like yacc (which does indeed
      allow recursion), it is a scanner that's confined to regular expressions.
      
      		Vern
 

Info Catalog flex: unnamed-faq-99 flex: FAQ flex: unnamed-faq-101