array new-expressions: proposal

[Christophe de Dinechin]

Daveed Vandevoorde wrote:
> 
> Matt Austern wrote:
> [...]
> > PROPOSAL A.
> >
> > No version of operator new[] is a special case.
> [...]
> > PROPOSAL B.
> >
> > ::operator new[](size_t, void*) is a special case.  For that
> > version of operator new[] only, n1 = n * sizeof(T).  We do not
> > store the number of elements in such an array anywhere.
> 
> There is a reason that placement new is called _placement_ new:
> the intent was to allow the placement of objects and arrays at a
> given address.  In effect, it's a way to specify a "this" pointer
> to a constructor.
> 
> So I think Proposal A is really not a good idea.
> 
>         Daveed

I sent a message to the -libraries mailing list. Although I agree with the
intent, there is also the question of how you expect people to delete[] it. If I
were to vote today, I'd agree with Daveed (and disallow delete[] on the result),
but I'm not sure enough though has been given to it.


Regards
Christophe