Info Catalog flex: I need to scan if-then-else blocks and while loops flex: FAQ flex: ERASEME56

flex: ERASEME55

 
 ERASEME55
 =========
 
      To: Colin Paul Adams <colin@colina.demon.co.uk>
      Subject: Re: Flex C++ classes and Bison
      In-reply-to: Your message of 09 Aug 1997 17:11:41 PDT.
      Date: Fri, 15 Aug 1997 10:48:19 PDT
      From: Vern Paxson <vern>
      
      > #define YY_DECL   int yylex (YYSTYPE *lvalp, struct parser_control
      > *parm)
      >
      > I have been trying  to get this to work as a C++ scanner, but it does
      > not appear to be possible (warning that it matches no declarations in
      > yyFlexLexer, or something like that).
      >
      > Is this supposed to be possible, or is it being worked on (I DID
      > notice the comment that scanner classes are still experimental, so I'm
      > not too hopeful)?
      
      What you need to do is derive a subclass from yyFlexLexer that provides
      the above yylex() method, squirrels away lvalp and parm into member
      variables, and then invokes yyFlexLexer::yylex() to do the regular scanning.
      
      		Vern
 

Info Catalog flex: I need to scan if-then-else blocks and while loops flex: FAQ flex: ERASEME56