[PD-dev] shared class data and functions

[Martin Peach]

On 2012-11-14 02:17, Jonathan Wilkes wrote:
> I have three classes:
> foo, bar, bow
>
> Foo has a function:
>
> void foo_blah(t_foo *x, t_symbol *s, t_int argc, t_atom *argv)
> {
>      if(x->x_member == 1) do_something...
> }
>
> Bar and bow both have x->x_member, too, and I want all three
> to use the same function so I don't have to copy it two more times.
> Is there a way to do this:
>
> void foo_blah(t_pd *x, t_symbol *s, t_int argc, t_atom *argv)
> {
>      if we can cast x to t_foo, t_bar or t_bow then
>      check if x has x->member equal to 1, and if so then do_something...
>
> }
>
> which I can call by sending t_foo, t_bar or t_bow as the first
> arg to that function?
>
> It seems like I should be able to do this but I can't figure out all the
> pointer bs.

Something like (t_foo *)x->member, or ((t_bar *)x)->member?

Martin