"Larry Evans" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
[...]
> Only if you want to collect cycles or provide some other means for
> accessing the arcs in the pointer graph. As a matter of fact, it may
> be better to do somewhat like shared_ptr does, i.e. instead of storing
> a ip_descriptor*, just store something like counted_base, where the
> actual instance is a derived class, counted_impl<T>, which knows the
> "real" type, T, of the object pointed to.
What about typeid(* m_ptr).name() which is also virtual and returns a real
compile-time id?
template <typename T>
struct identifier
{
static type_info const value = typeid(T);
};
template <typename T>
type_info const identifier<T>::value;
...
template <typename T, typename U>
bool compare()
{
return (& identifier<T>::value == & identifier<U>::value)
}
...
compare<A, B>();
Philippe A. Bouchard
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