Thank you very much for your feedback! :D I updated the code (
https://github.com/eduardoacye/GuileCppApplication ).

If you have any other suggestions for making a better C++ interface with
GNU Guile, i can do my best to put them in the code.


Eduardo.


On Tue, Apr 1, 2014 at 6:34 AM, Ralf Mattes <rm@seid-online.de> wrote:

> On Tue, Apr 01, 2014 at 06:35:59PM +0800, Nala Ginrut wrote:
> > On Thu, 2014-03-27 at 21:03 -0700, Eduardo Acuņa wrote:
>
>
> Slightly reordered ....
>
> >
> > Sorry I can't help you on this. IMO, you don't understand why you can't
> > cast it as a function pointer. Maybe it's different from C?
>
> Yes, somehow C++ happens to be different from C ;-)
>
> > > My program calls scm_boot_guile from the member function init() of the
> > > GuileApplication class. There is no problem passing the argc and argv
> > > to scm_boot_guile, however i want to pass the member function
> > > guileMain as the third argument of scm_boot_guile like a void function
> > > pointer (i can't cast the member function as a function pointer). The
> > > current way i'm avoiding this problem is passing as the third argument
> > > a function outside of the GuileApplication class, and passing the
> > > address of the instance of the GuileApplication as the fourth argument
> > > for dereferencing the object and calling the guileMain member function
> > > from there, so i had to make this non-member function a friend of
> > > GuileApplication. This method works but it doesn't seem to be a clean
> > > way of doing things.
>
> I'd do this slightly different: instead of using a non-member function
> (which
> needs to be declared a friend) I'd rather give my object a static function
> -
> static functions _can_ be used as C callbacks (since they don't expect a
> hidden instance as the first parameter). You'd still need to pass down an
> instance of your GuileApplication class so it can be handed to
> scm_boot_guile
> as the data parameter. This is asdmittedly only slightly better than your
> solution.
>
> HTH Ralf Mattes
>
>