Empty base optimization, sharing vptrs

[Daveed Vandevoorde]

Jim Dehnert wrote:
[...]
> > You probably have noticed that I currently don't read the standard
> > that way. But I also acknowledge that this is quite a reasonable way
> > of implementing things. Jason was supposed to send a message to
> > c++core regarding this issue. I did not receive this message, but
> > this might be a problem with our mail setup. Was the message sent?
> 
> SGI hasn't gotten it either.  I added an action item for Jason.
> He now has an opportunity to be the first person to finish one :-).

I did get the message. It is c++std-core-8101.
Responses: c++std-core-8102 ... c++std-core-8106.

(You can retrieve the messages by sending e-mail to 
c++std-ping at research.att.com.)

	Daveed