From: jo@durchholz.org   
      
   jamin.hanson@googlemail.com schrieb:   
   > Hi there,   
   >   
   > I am author of lexertl (http://www.benhanson.net/lexertl.html), a   
   > lexer generator library, and I have recently added support for '^' and   
   > '$'.  As position matching in regex is not described in any books I   
   > have looked at, does anyone know what the precedence rules should be?   
      
   I think Perl regexes are what people expect, so I'd stick with the   
   precedences that PCRE uses.   
      
   > If an earlier rule starts with '$', does that mean that a subsequent   
   > rule starting with '^' has the '^' ignored?   
      
   I didn't understand that. A concrete example might help.   
      
   Regards,   
   Jo   
   [I don't understand it either.  My understanding of typical REs is   
   that they special case ^ at the beginning of a pattern or chunk   
   that could match at the beginning, and $ at the end. -John]   
      
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