Re: C++ PATCH: Old ABI compatibility

[Chip Salzenberg <chip at valinux dot com>]

According to Mark Mitchell:
> >>>>> "Chip" == Chip Salzenberg <chip@valinux.com> writes:
>     Chip> True, BUT: Is it at least safe to assume that single,
>     Chip> non-virtual inheritance results in no deltas?
> 
> No.  That's true in all the ABI's I know of, but I don't think
> anything in the standard guarantees this [...]

I seem to recall an ANSI C requirement that:
   (void*)(&struct) == (void*)(&struct.first_member)
In other words,
   OFFSETOF(struct, first_member) == 0

Could that be parlayed into a single-inheritance delta requirement?
-- 
Chip Salzenberg              - a.k.a. -              <chip@valinux.com>
"I wanted to play hopscotch with the impenetrable mystery of existence,
    but he stepped in a wormhole and had to go in early."  // MST3K