[C++-sig] range with virtual functions

[Piotr Jaroszynski]

On Wednesday 28 of March 2007 22:50:44 Roman Yakovenko wrote:
> I am not sure whether range takes references to [pure]virtual functions,
> but you
> can use same trick as in your previous question: define 2 static functions,
> which take reference to your class instance and return relevant iterator.
> Than expose
> these functions. This should work.

I basically get the idea, but I don't know how to implement these static 
functions to return the relevant iterator.

When just wrapping non-pure virtuals I do:
struct FooWrapper
(...)
    iterator begin_foo()
    {
        if (override begin_foo = this->get_override("begin_foo"))
            return begin_foo();
        return Foo::begin_foo();
    }
    iterator default_begin_foo() { return this->Foo::begin_foo(); }

and then .def("begin_foo", &Foo::begin_foo, &FooWrapper::defualt_begin_foo).
So I suppose I need to somehow emulate what's def doing here in the static 
functions, but how?

P.S. I always wondered why .def is not taking the &FooWrapper::begin_foo, but 
the default_begin_foo and the "original" begin_foo from Foo.

-- 
Best Regards,
Piotr Jaroszynski