Re: [Boost-users] Boost.Python: wrapping OpenSceneGraph smart pointers, again

On 2009-10-20, OvermindDL1 wrote:

Ooo, impressively simple. That should be added to the docs (FAQ at least?).

I've put up an improved version at the bottom of: http://wiki.python.org/moin/boost.python/PointersAndSmartPointers Hopefully, the next person to come along will have an easier time of it. Randolph

On Mon, Oct 19, 2009 at 10:46 PM, Randolph Fritz wrote:

...

It's surprisingly simple, it turns out.

First, you have to tag the OSG smart pointer type, as follows: ------------------- #ifndef REF_PTR_TRAIT_ #define REF_PTR_TRAIT_

#include #include

namespace boost {  namespace python {    template <class T> struct pointee< osg::ref_ptr<T> >    { typedef T type; };  }}

#endif -------------------

Then, in a BOOST_PYTHON_MODULE, you can write:

 class_("Node", init<>())    ;

You can of course add as many of the Node class's methods as desired.

Randolph

On 2009-10-14, OvermindDL1 wrote:

...

On Tue, Oct 13, 2009 at 7:34 PM, Randolph Fritz wrote:

...

What is wrong with the following code?  I suspect I'm doing something silly, and I suspect the answer is obvious.

 #include  #include

 #include  #include

 using namespace osg;  typedef ref_ptr<Node> NodePtr;

 using namespace boost::python;

 BOOST_PYTHON_MODULE(NodePtr) {    class_("NodePtr")      ;  }

Boost.Python knows Boost and TR1 smart pointers, not any others.  If you are using any others (ref_ptr in this case I gather) then you need to make Boost.Python aware of it, I am not sure how, reading through the code might reveal how.