From: george AT george DOT org (Babylon7)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: HELP: Bison, Flex & C++ class support...
Date: Fri, 18 Apr 1997 03:13:32 GMT
Organization: Erol's Internet Services
Lines: 34
Message-ID: <335be6d9.25865240@news.erols.com>
References: <Pine DOT SUN DOT 3 DOT 91 DOT 970417163803 DOT 19669B-100000 AT is>
NNTP-Posting-Host: spg-as25s25.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk


On Thu, 17 Apr 1997 13:42:53 GMT, Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
wrote:

>
>
>On Thu, 17 Apr 1997, Programmed to death wrote:
>
>> I want to be able use c++ classes in both the lexer and the parser,
>> and possibly pass objects of a particular class back and forth between
>> the two.
>
>Caveat: I have never used flex with C++, so the advice below might be 
>nothing but a wild goose.
>
>What version of flex did you use?  The latest port of flex 2.5.4
>(v2gnu/flx254b.zip) comes with a program flexpp.exe that should be used
>for creating C++ lexers.  A header file FlexLexer.h should also be used 
>in C++ lexers.  I believe this is all explained in the flex docs.

	I am using Flex 2.5.2, Bison 1.24, and gcc v2.7.2.1. I took a
look at FlexLexer Scanner class, it looks interesting but i haven't
heard about anyone swearing by it yet.
	I am trying to keep the whole project compilable using
gcc, lex, and yacc.  So i would rather not delve into the Flex scanner
Class right now.  I have the yacc compatiblity option on in Bison
and am trying to keep to standard lex.
	Everyone should have gcc though... so I will use c++ freely
where it doesn't get in the way of lex and yacc compatibility.

	By the way,  Chris Croughton's suggestions worked... I have
uploaded the fixed code in reply to his post.

			Programming the fun way