[C++-sig] abstract templates and pyste question.

[Nicodemus]

Hanz Meizer wrote:

> Dear list,
>
> I've tried to wrap an abstract template using pyste. Unfortunately, I 
> somehow do not get it to work properly. Maybe there's someone out 
> there who can help? Using boot-1.31. The main problem seems that I 
> have a hierarchy of templates where the base template is abstract. I 
> get tons of error messages, I assume I'd have to tell pyste that the 
> base template has to have a no_init keyword. Unfortunately, I haven't 
> found out how to do this.
>
> example template:
>
> ----------------------------------------------------
> template<class T>
> class PreProcessor
> {
> public:
>   PreProcessor() {}
>   virtual ~PreProcessor() {}
>
>   virtual const int getSize(void) = 0;
>   virtual T* getObject(int id) = 0;
> };
> ----------------------------------------------------
>
You have to create a Template, and the instantiate it for the types you 
want:

PreProcessor = Template("PreProcessor", "preprocessor.hpp") # here no 
class is exported yet

PreProcessor("float", "FPreProcessor")  # instantiate PreProcessor with 
T=float, and rename the
                                        # instantiated class to 
FPreProcessor

That should do it.

Regards,
Nicodemus.

> Can anyone tell me how to export such constructs using pyste? If that 
> is not possible, maybe there's a working method for boost.python?
>
> H.
>
>
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