Re: Bison complains about undefined reference of my own data type

[Hans Aberg]

On 23 Nov 2008, at 17:48, sgaurelius wrote:

> I am a newbie in bison, so I don't know all the secrets. I used for  
> a while a
> standard example with its own data type and now I want to include  
> my own. I
> included the header file, but the compiler throws me an exception for
> undefined reference. However, this is not true, the implementation  
> of the
> function of my data types class are in the cpp file. The  
> explanation I can
> give is the following.
>
> The example's data type was in a header file, let's say example.h. The
> implementation was in the same .h file, so it worked. My data type's
> implementation is in a separate .cpp file. So, there is some  
> problem for
> bison to recognize .cpp files? Maybe, because it is in C and not C++ ?

Your .yy file needs to contain something like

class semantic_type {
public:
  ,,,
  semantic_type() : number_(0) {}
};

#define YYSTYPE semantic_type

and also #include's for headers that the parser might need.

  Hans