Re: class hierarchies and smart pointers

Hi,

Try this:

 class_<Base, Holder<Base> >("Base");
 class_<Derived, Base, Holder<Base> >("Derived");

I haven't tried it, but there's an example in luabind docs (in the end
of 8.7 Smart Pointers section):

...
    class_<base, boost::shared_ptr<base> >("base")
        .def(constructor<>()),
    class_<derived, base, boost::shared_ptr<base> >("base")
        .def(constructor<>())
...

Hope this helps


On Mon, Aug 31, 2009 at 8:30 PM, David Raulo<[email protected]> wrote:
> On Mon, 17 Aug 2009 12:06:16 +0200
> David Raulo <[email protected]> wrote:
>
>> Hi,
>>
>> I have a class hierarchy whose instances need to be managed with a
>> smart pointer Holder<> when passed to/from lua. So I declared the
>> classes like this:
>>   class_<Base, Holder<Base> >("Base");
>>   class_<Derived, Holder<Base> >("Derived");
>>
>> The problem is I also have functions like :
>>   Holder<Derived> foo()
>>
>> and I really need to access the result as a Derived instance.
>> Luabind complains at runtime that Holder<Derived> is not registered.
>> I'm curious to know if anyone on the list faced this, and of course
>> how they solved it :)   Thanks!
>
> So, anybody knows?
>
> Thanks
>
> - David
>
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