At 03:34 AM 2/23/2003, Thomas Witt wrote:
>Greg,
>
>I can not figure out how you make sure to satisfy the alignment constraints of
>T and counted_base_header_impl. Any hint would be appreciated.
I just used two char arrays, thinking there was a dispensation
somewhere in the standard to allow for placement new into char
arrays:
template<typename T> struct object_with_counted_header {
char header[sizeof(counted_base_header_impl<T*,checked_deleter<T> >)];
char object[sizeof(T)];
};
If I'm wrong, an alternative might be:
template<typename T> struct object_with_counted_header {
counted_base_header_impl<T*,checked_deleter<T> > header;
T object;
};
But then you can't use offsetof, and some fancier tricks will
be in order.
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