That's an excellent idea!It's so concise and delicate to use different internal holders to represent different sub-objects.
However I have a question about the query. How should a any object find which holder is the correct one to the casting query for one special base class?
Thanks!
On Mon, Sep 6, 2010 at 9:05 PM, Steven Watanabe
<watanabesj@gmail.com> wrote:
AMDG
Tang Jiang Jun wrote:
After thinking deeper, I figure out a rough implementation for this idea,
and prove it can work with polymorphism. (It is just rough concept
verification, and need a lot of work to polish it and make it usable).
A more automated way would be to use
multiple inheritance and cross cast.
class any_impl_base {
public:
virtual ~any_impl_base() {}
};
template<class T, bool is_class = boost::is_class<T>::value>
class any_impl : public T, public any_impl_base {};
In Christ,
Steven Watanabe