Compilers construction tools questions

"Salvador Valerio Cavadini" <scavadini@hotmail.com>
24 Jun 1998 00:15:29 -0400

          From comp.compilers
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Compilers construction tools questions scavadini@hotmail.com (Salvador Valerio Cavadini) (1998-06-24)
Re: Compilers construction tools questions collins@cs.wm.edu (1998-06-24)
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From: "Salvador Valerio Cavadini" <scavadini@hotmail.com>
Newsgroups: comp.compilers
Date: 24 Jun 1998 00:15:29 -0400
Organization: Compilers Central
Keywords: question
X-Originating-IP: [200.16.132.43]

Hi,
                  I'm working in a research proyect about compilers construction
tools and I have some questions (and problems):


  1- I'm testing a tool called YAY ver. 1.0 and I found there are
problems
  when it is used with the +LR2 switch, since the generated parser reject
  correct programs. Somebody have this problem too? How can I fix it?


  2- Is 1.9 the lastest version of BYACC for DOS?


  3- I downloaded the Ada grammar from comp.compilers file repository.
  This grammar uses a notation that I didn't see before.
  Example:
                  NT : /* empty */
                                  | ..NT.. NT
                                  ;


  What means the two point ("..") before and after NT? The grammar
  documentation sais that is a "Yacckeable" version of EBNF. It is? The
  original Yacc accept EBNF? I compiled the grammar with diferent Yacc
  versions, most returned an error, others (included original Yacc)
  compiles but I noted that they not "understand" ..NT.. like EBNF.


  Thanks.


  ___________________________
  Salvador Cavadini
  Santiago del Estero - Argentina
  emails: scavadini@hotmail.com
                  juanjo@ucseii.edu.ar
--

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