Re: Unable to compile in Visual C++

[Luca]

Joel E. Denny ha scritto:
> On Fri, 19 Jun 2009, Ewa Rom wrote:
>
>   
> > %{
> > int yylex();
> > void yyerror(char *s);
> >  #include "stdafx.h"
> >  #include <stdio.h>
> >  #include <iostream>
> >  #include <stdlib.h>
> >  #include <stdarg.h>
> >  #include <string.h>
> >  #include <fstream>
> >  #include <windows.h>
> >  #include <Shellapi.h>
> >  #include "parser.hpp"
> >  #include "resource.h"
> >
> > nodeType *v(char s);
> > nodeType *in(int i);
> > nodeType *oper(char s,nodeType l,nodeType r);
> >
> > void printToFile(char *s);
> >
> > using namespace std;
> > %}
> >     
>
> >From the above block, try moving everything that the %union below depends 
> upon to a %code requires.  I believe that's just:
>
>   %code requires {
>     #include "resource.h"
>   }
>
>   
This is right.
> > %union {
> >  int iValue;
> >  char sIndex;
> >  nodeType *nPtr;
> > }
> >     
>
>   
> > flex -olex.cpp CoProveLexer.lex
> > bison -v -d --language=C++ -oparser.cpp CoProveParser.y
> >
> >  
> >
> > Which generates me lex.cpp parser.cpp and parser.hpp files that I have 
> > included into my Visual C++ project.
> >
> > Then I try to build the project and I get the following error:
> >
> >  
> >
> > 1>CoProveParser.y(28) : error C2143: syntax error : missing ';' before '*'
> >
> > 1>CoProveParser.y(28) : error C4430: missing type specifier - int assumed. 
> > Note: C++ does not support default-int
> >
> > 1>CoProveParser.y(28) : error C4430: missing type specifier - int assumed. 
> > Note: C++ does not support default-int
> >     
>
>   
> > It seems like the %union does not know about the definition of the 
> > nodeType structure defined in the resource.h file even if I include it 
> > in the first part of the y file enclosed by %{ %}
> >     
>
> %{ %} does not generate code into the parser.hpp file.  Based on the 
> information you've provided, I believe that's the problem you've 
> encountered.  If so, the %code suggestion I gave above should fix it.
>
> In general, you ought to consider using %code instead of the old %{ %} to 
> avoid these kinds of issues.  See the %code entries in the section "Bison 
> Declaration Summary" in the Bison manual for a summary of its 
> functionality.  See the section "Prologue Alternatives" for a detailed 
> discussion including the advantages of %code over %{ %}.
>
> However, %code is not available in Bison 2.3a and earlier, so your 
> grammars would only work with more recent versions of Bison. 
In this case, you have always to include "resource.h" BEFORE y.tab.h.
You can put them in a common header.
>  If 
> compatibility is a concern for you, we can discuss other solutions, but 
> please try %code first to see if that fixes your problem.
>
>
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