Chris@16: // Copyright David Abrahams 2004. Distributed under the Boost
Chris@16: // Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef WRAPPER_BASE_DWA2004722_HPP
Chris@16: # define WRAPPER_BASE_DWA2004722_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: # include <boost/type_traits/is_polymorphic.hpp>
Chris@16: # include <boost/mpl/bool.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python {
Chris@16: 
Chris@16: class override;
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16:   class BOOST_PYTHON_DECL_FORWARD wrapper_base;
Chris@16:   
Chris@16:   namespace wrapper_base_ // ADL disabler
Chris@16:   {
Chris@16:     inline PyObject* get_owner(wrapper_base const volatile& w);
Chris@16: 
Chris@16:     inline PyObject*
Chris@16:     owner_impl(void const volatile* /*x*/, mpl::false_)
Chris@16:     {
Chris@16:         return 0;
Chris@16:     }
Chris@16:     
Chris@16:     template <class T>
Chris@16:     inline PyObject*
Chris@16:     owner_impl(T const volatile* x, mpl::true_);
Chris@16:     
Chris@16:     template <class T>
Chris@16:     inline PyObject*
Chris@16:     owner(T const volatile* x)
Chris@16:     {
Chris@16:         return wrapper_base_::owner_impl(x,is_polymorphic<T>());
Chris@16:     }
Chris@16:   }
Chris@16:   
Chris@16:   class BOOST_PYTHON_DECL wrapper_base
Chris@16:   {
Chris@16:       friend void initialize_wrapper(PyObject* self, wrapper_base* w);
Chris@16:       friend PyObject* wrapper_base_::get_owner(wrapper_base const volatile& w);
Chris@16:    protected:
Chris@16:       wrapper_base() : m_self(0) {}
Chris@16:           
Chris@16:       override get_override(
Chris@16:           char const* name, PyTypeObject* class_object) const;
Chris@16: 
Chris@16:    private:
Chris@16:       void detach();
Chris@16:       
Chris@16:    private:
Chris@16:       PyObject* m_self;
Chris@16:   };
Chris@16: 
Chris@16:   namespace wrapper_base_ // ADL disabler
Chris@16:   {
Chris@16:     template <class T>
Chris@16:     inline PyObject*
Chris@16:     owner_impl(T const volatile* x, mpl::true_)
Chris@16:     {
Chris@16:         if (wrapper_base const volatile* w = dynamic_cast<wrapper_base const volatile*>(x))
Chris@16:         {
Chris@16:             return wrapper_base_::get_owner(*w);
Chris@16:         }
Chris@16:         return 0;
Chris@16:     }
Chris@16:     
Chris@16:     inline PyObject* get_owner(wrapper_base const volatile& w)
Chris@16:     {
Chris@16:         return w.m_self;
Chris@16:     }
Chris@16:   }
Chris@16:   
Chris@16:   inline void initialize_wrapper(PyObject* self, wrapper_base* w)
Chris@16:   {
Chris@16:       w->m_self = self;
Chris@16:   }
Chris@16: 
Chris@16:   inline void initialize_wrapper(PyObject* /*self*/, ...) {}
Chris@16: 
Chris@16:   
Chris@16:   
Chris@16: } // namespace detail
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // WRAPPER_BASE_DWA2004722_HPP