On Feb 21, 8:57 pm, Jeff Schwab <j...@schwabcenter.com> wrote:
> Berardino la Torre wrote:
> > is it possible to do something like this ? :

[Berardino's original post isn't showing up here, but...]

> [Summarized for brevity:]

> template <typename Base>
> struct Object: Base::Interface { };

This line isn't legal C++. What it almost certainly should be
is:

struct Object : typename Base::Interface {} ;


> struct IA { virtual void print() =0; };

> struct A: Object<A> {
> typedef IA A::Interface;
> void print() { }
> };

> You're trying to derive a class (indirectly) from a type
> defined within that class.

Which is impossible, templates or not.

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