non const reference

hi,

here's a toy example I'd like to wrap using luabind:

struct A
{
private
     A(const A&) {}
};

struct B
{
     virtual void foo(A &a)
     {
     }
};

struct B_wrap : public B, public wrap_base
{
     virtual void foo(A &a)
     {
         call<void>("foo", a);
     }

     static void default_foo(B *p, A &a)
     {
         p->B::foo(a);
     }
};

module(L)[
class<A>,
class_<B, B_wrap>("B"),
     .def("foo", &B::foo, &B_wrap::default_foo)
];

I have questions regarding this:

the compiler complains because A constructor is private

1) Is there a non-intrusive way to inform luabind that a pointer to A* 
could be used instead of the reference to avoid the copy?

2) I guess a static forwarding function like:
static function void static_foo(B *b, A *a)
{
     assert(b && a);
     b->foo(*a);
}

would solve my first question, but how to make that play well with 
virtual function overloading?

3) how can I tell luabind that the lifetime of this object is only 
guaranteed during this function call and shouldn't be acquired by lua code?

best

remy



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