Re: Per-object inheritance in core a red herring?

[Adam Turoff]

On Tue, Jul 10, 2001 at 02:08:58AM -0500, David L. Nicol wrote:
> Uh, C++ virtual methods can be overloaded on a per-object basis, not
> just a per-class basis, since the object drags around its virtual jump
> table with it wherever it goes, so the jump can get compiled into
> "jump to the address that is <offset> bytes away from the start of
> the object that is doing the method" which is pretty light, unless
> you've got dozens of virtual methods.

And what's the linguistic hook that allows C++ object-based inheritance?
And where's the guarantee that vtbls are per-object and not per-class?

Z.