Re: auto_ptr for array of built-ins

On Apr 17, 2:43 pm, Carlos Moreno <cm_n...@[EMAIL PROTECTED]
> wrote:
> Hi,
>
> I'm facing a situation where it would seem all possible solutions
> have some severe inconvenience.
>
If N is known at compile time:
template<std::size_t N>struct Buf{
   //maybe a length member?
   char mbuf[N];
};
std::auto_ptr<Buf<250> > mybuf(new Buf<250>);
yeilds exactly what you want. (of course, passing mybuf->mbuf to your
function)

If N is not known at compile time:
void *p=::operator new(n+sizeof(Buf<1>));
std::auto_ptr<Buf<1> > mybuf(new (p)Buf<1> );
also gives you what you want.

As noted by other poesters there are fancier pointers out there, and
other ways of solving the problem, but the above is how you might do
it with the humble auto_ptr.

Lance





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