Chris@16: // Copyright David Abrahams 2002.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef TO_PYTHON_INDIRECT_DWA200221_HPP
Chris@16: # define TO_PYTHON_INDIRECT_DWA200221_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: 
Chris@16: # include <boost/python/object/pointer_holder.hpp>
Chris@16: # include <boost/python/object/make_ptr_instance.hpp>
Chris@16: 
Chris@16: # include <boost/python/detail/none.hpp>
Chris@16: 
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16: # include <boost/python/converter/pytype_function.hpp>
Chris@16: #endif
Chris@16: 
Chris@16: # include <boost/python/refcount.hpp>
Chris@16: 
Chris@16: # include <boost/type_traits/is_pointer.hpp>
Chris@16: # include <boost/type_traits/is_polymorphic.hpp>
Chris@16: 
Chris@16: # include <boost/mpl/bool.hpp>
Chris@16: 
Chris@16: # if defined(__ICL) && __ICL < 600 
Chris@16: #  include <boost/shared_ptr.hpp>
Chris@16: # else 
Chris@16: #  include <memory>
Chris@16: # endif
Chris@16: 
Chris@16: namespace boost { namespace python {
Chris@16: 
Chris@16: template <class T, class MakeHolder>
Chris@16: struct to_python_indirect
Chris@16: {
Chris@16:     template <class U>
Chris@16:     inline PyObject*
Chris@16:     operator()(U const& ref) const
Chris@16:     {
Chris@16:         return this->execute(const_cast<U&>(ref), is_pointer<U>());
Chris@16:     }
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16:     inline PyTypeObject const*
Chris@16:     get_pytype()const
Chris@16:     {
Chris@16:         return converter::registered_pytype<T>::get_pytype();
Chris@16:     }
Chris@16: #endif
Chris@16:  private:
Chris@16:     template <class U>
Chris@16:     inline PyObject* execute(U* ptr, mpl::true_) const
Chris@16:     {
Chris@16:         // No special NULL treatment for references
Chris@16:         if (ptr == 0)
Chris@16:             return python::detail::none();
Chris@16:         else
Chris@16:             return this->execute(*ptr, mpl::false_());
Chris@16:     }
Chris@16:     
Chris@16:     template <class U>
Chris@16:     inline PyObject* execute(U const& x, mpl::false_) const
Chris@16:     {
Chris@16:         U* const p = &const_cast<U&>(x);
Chris@16:         if (is_polymorphic<U>::value)
Chris@16:         {
Chris@16:             if (PyObject* o = detail::wrapper_base_::owner(p))
Chris@16:                 return incref(o);
Chris@16:         }
Chris@16:         return MakeHolder::execute(p);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: //
Chris@16: // implementations
Chris@16: //
Chris@16: namespace detail
Chris@16: {
Chris@16:   struct make_owning_holder
Chris@16:   {
Chris@16:       template <class T>
Chris@16:       static PyObject* execute(T* p)
Chris@16:       {
Chris@16:           // can't use auto_ptr with Intel 5 and VC6 Dinkum library
Chris@16:           // for some reason. We get link errors against the auto_ptr
Chris@16:           // copy constructor.
Chris@16: # if defined(__ICL) && __ICL < 600 
Chris@16:           typedef boost::shared_ptr<T> smart_pointer;
Chris@16: # else 
Chris@16:           typedef std::auto_ptr<T> smart_pointer;
Chris@16: # endif
Chris@16:           typedef objects::pointer_holder<smart_pointer, T> holder_t;
Chris@16: 
Chris@16:           smart_pointer ptr(const_cast<T*>(p));
Chris@16:           return objects::make_ptr_instance<T, holder_t>::execute(ptr);
Chris@16:       }
Chris@16:   };
Chris@16: 
Chris@16:   struct make_reference_holder
Chris@16:   {
Chris@16:       template <class T>
Chris@16:       static PyObject* execute(T* p)
Chris@16:       {
Chris@16:           typedef objects::pointer_holder<T*, T> holder_t;
Chris@16:           T* q = const_cast<T*>(p);
Chris@16:           return objects::make_ptr_instance<T, holder_t>::execute(q);
Chris@16:       }
Chris@16:   };
Chris@16: }
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // TO_PYTHON_INDIRECT_DWA200221_HPP