D-dll support: testers needed round 2

[evilrat]

On Saturday, 31 March 2018 at 08:33:19 UTC, Rainer Schuetze wrote:
>
> I guess you want to cast to a class that is only defined in the 
> dynamically loaded DLL? The problem is that casting needs a 
> reference to the class info of the target class which only 
> exists in the referenced DLL, which needs static DLL linkage.
>
> One suggestion would be to export a common class/interface 
> definition from a DLL that is referenced by both the dynamic 
> DLL and the loading executable.

Common class defined in static lib linked with both exe & dll.

Cast to classes seems to be working when done through void* 
first. But unfortunattely interface casts didn't work 
correctly(vtable issues).