Re: Totally Stumped...Run-Time Check Failure...

[brian plummer]

Hi Hans:

Thanks for the reply.

>>Is your YYSTYPE defined properly?

Yes, at least I think so.  Here is my definition:

typedef union {
    int ivalue;
    Symbol *sp;
    NODE *np;
} YYSTYPE;

I will only say that something very strange is happening here.  If I jump
into the the generated yyparse() code and add a memset to set the value of
yyval before it is used, then I'm OK as in:

  YYSTYPE yyval; /*  the variable used to return */
  memset(&yyval,0,sizeof(YYSTYPE));

Additionally, if I build my code on Solaris I don't see anything like this
problem.  I'm building in Debug mode in VC++ (version 7, version string is
below) so I wouldn't think the optimizer would be making some kind of
erroneous removal of the yyval variable.  Any ideas on this issue are
welcome...

A quick question.  I'm seeing different behavior between my Solaris bison
and my WIN32 bison (cygwin) both are version 1.35.  On Solaris and Windows
the command is:

bison -l -d -odc5.cpp dc5.y

but on Solaris I get dc5.hpp with header guards and a typedef on the union
for YYSTYPE as yystype as in:

#ifndef YYSTYPE
typedef union {
    int ivalue;
    Symbol *sp;
    NODE *np;
} yystype;
# define YYSTYPE yystype
# define YYSTYPE_IS_TRIVIAL 1
#endif

but on Windows I get a file name dc5.cpp.h without any header guards or the
#ifndef above...any ideas here?

Thanks for your assistance,
Brian Plummer

Here is the version string for my MSVC++:

Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.00.9466 for 80x86
Copyright (C) Microsoft Corporation 1984-2001. All rights reserved.




>From: Hans Aberg <address@hidden>
>To: "brian plummer" <address@hidden>
>CC: address@hidden
>Subject: Re: Totally Stumped...Run-Time Check Failure...
>Date: Wed, 18 Sep 2002 20:54:25 +0200
>
>At 18:21 +0000 2002/09/18, brian plummer wrote:
> >I'm getting the following error at runtime in VC++:
> >
> >Run-Time Check Failure #3 - The variable 'yyval' is being used without
>being
> >defined.
> >
> >and the line that is causing the problem is:
> >
> >  *++yyvsp = yyval;
> >
> >which is within yyparse().
> >
> >But yyval is defined as far as I can see.  I run my code through the
> >pre-processor and yyval is there plain as day:
> >
> >  YYSTYPE yyval;             /*  the variable used to return         */
>
>Is your YYSTYPE defined properly?
>
>   Hans Aberg




_________________________________________________________________
Join the worldís largest e-mail service with MSN Hotmail.
http://www.hotmail.com