Re: Passing myself, a struct, as a C callback context

[ketmar via Digitalmars-d-learn]

On Sun, 29 Mar 2015 22:53:35 -0400, Paul O'Neil wrote:

> I'm registering a callback with some C code.  The simplified story is
> here, but the actual code is on GitHub [1] at the end if you care.
> 
> The call looks something like this.
> 
> void register(void(*fp)(void*), void* context);
> 
> I have a class that holds state for the callback and registers itself:
> 
> final class Klass {
>     void method()
>     {
>         register(callback_function, &this);
>     }
> }
> 
> As of dmd 2.067, doing "&this" is deprecated.  Is there an idiomatic way
> to do this?
> 
> [0] Actual code is at
> https://github.com/todayman/dubik/blob/master/source/vibe/core/drivers/
rx.d#L177
> .  The msg object eventually gets passed to the registration function.
> 
> Thanks,

you still can cast `this` to void pointer: `cast(void*)this`

but beware of possible `opCast` overloads for `void*` (there are no in 
stdlib, but...)

signature.asc
Description: PGP signature