Re: non const reference

no answer?

Le 08/02/2012 12:12, Remy Muller a écrit :
> 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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