[C++-sig] shared_ptr converters

[David Abrahams]

Nicodemus <nicodemus at globalite.com.br> writes:

> David Abrahams wrote:
>
>>Nicodemus <nicodemus at globalite.com.br> writes:
>>
>>
>>>To resume, pyste is generating the following code when the user requests
>>>shared_ptr support for a class X:
>>>
>>>    // Temporary code for smart pointers
>>>    objects::class_value_wrapper<
>>>      boost::shared_ptr< X >, objects::make_ptr_instance<
>>>        X, objects::pointer_holder<
>>>          boost::shared_ptr< X >, X >
>>>      >
>>>    >();
>>>
>>
>>Perhaps you'd like to contribute a nice wrapper function for this to
>>the Boost.Python codebase, e.g.:
>>
>>    template <class P>
>>    void register_ptr_to_python(P* = 0)
>>    {
>>        typedef pointee<P>::type X;
>>        objects::class_value_wrapper<
>>            P
>>          , objects::make_ptr_instance<
>>                X
>>              , objects::pointer_holder<P,X>
>>            >
>>        >();
>>    }
>>
>>??
>>
>
> Well, you already did all the work! ;)

Haha, gotcha!  Still needs documentation and tests...
I just did the easy part.

> Attached are the needed changes to the current CVS:
> register_ptr_to_python.hpp should go to boost/python/converter, and a
> diff for boost/python.hpp. I tested in my example like so:
>
>     class_< A, boost::noncopyable, A_Wrapper >("A");
>     register_ptr_to_python< boost::shared_ptr<A> >();
>
> and it seems to work fine.
>

Thanks for testing.  When you post a doc patch, I'll commit the whole wad ;-)

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com