Getting derived classes

[BCS]

Reply to Bill,

> On Sat, Oct 18, 2008 at 6:20 AM, BCS <ao at pathlink.com> wrote:
> 
>> Reply to dsimcha,
>> 
>>> I know that, in std.traits, there's a template that spits out all
>>> base classes for a given class.  Based on reading the source, it
>>> seems to work based on a rather interesting use case for is
>>> expressions.  Is there any equivalent way to do the opposite:  For
>>> any given position in a class hierarchy, to get a tuple of all
>>> possible descendants?
>>> 
>> Via DLL/SO's, a derived class can be /written/ after the program that
>> it will be used in is /compiled/. Because of that (and other less
>> restrictive forms of that issue) The most general answer is; can't be
>> done.
>> 
> I wonder what Object.Factory does when you try to make a class from a
> DLL like that.
> 
> I'm guessing it doesn't work.
> 
> --bb
> 

it might work by hiding a static this function that registries the class, 
from that, when the dll lodes the class is registered.