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From: dns@essnj1.ESSNJAY.COM (David N. Sears)
Newsgroups: comp.lang.c++
Subject: Re: Object Oriented Lex(++) and Yacc(++)
Message-ID: <812@essnj1.ESSNJAY.COM>
Date: 22 Jun 91 18:01:57 GMT
References: <1991Jun17.002512.1384@atc1.atc.com>
Organization: ESSNJAY Systems Inc., Bethany, CT, USA
Lines: 26

In <1991Jun17.002512.1384@atc1.atc.com> mayil@atc1.atc.com (S. P. Mayil) writes:

>Hi,

>We are planning to write an interpreter for a customized language in C++
>with the help of tools like Lex(++) and Yacc(++).  Do you know about any
>Lex++ and Yacc++ implementations that

>  o generate C++ compatible sources at the least
>  o make use of C++ concepts and generate not just compatible sources but
>    full fledged C++ sources.

I'm developing a real-time graphics application using g++ and InterViews.
Part of the design spec is a graph description language to be parsed at
runtime. In complete ignorance of any special requirements of c++,
I wrote a yacc grammar and a lex front-end for the language (with c++
actions to construct new objects) and passed it through g++.

I now have a yac++.h and lex++.h, neither more than 6 lines of code,
which allow me to use standard systemV lex and yacc in c++. If you try
compiling your grammar with your c++ compiler, you may find that it is
just as easy for you to adapt lex and yacc for your application.

cheers,
David Sears
loosely affiliated with EssnJay Systems, Inc.