Re: [Quantlib-dev] QuantLib-SWING: is it possible to use polymorphism?

[Andrea <mar...@go...>]

On 29/10/09 16:03, Luigi Ballabio wrote:
> On Wed, 2009-10-21 at 17:58 +0100, Andrea wrote:
>> On 21/10/09 15:55, Luigi Ballabio wrote:
>>> 	unfortunately, polymorphism doesn't currently work across
>> languages.
>>>
>> Indeed.
>> I've tried to use directors and it seems to work well if there are no
>> shared_ptr involved.
>>
>> My problem now is [...] I don't seem to be able to create a shared_ptr
>> in the target language.
> 
> There would be quite a bit of work to do.  You would have to:
> - add a constructor to boost::shared_ptr in common.i so that it takes a
> pointer;

I've got a big doubt here.
Is it safe to stick the raw pointer into a shared_ptr? Is it already owned by some other swig mechanism?

> - modify the exported payoff classes so that they no longer hide the
> shared_ptr (e.g., export the actual PlainVanillaPayoff, not
> PlainVanillaPayoffPtr) and enable directors;
> - export the shared_ptr<Payoff> as a separate class;
> - fix the other interfaces so that they work with the new classes.
> 
> Let me know if you get stuck in any of the steps.
> 
> Luigi
> 
>