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_VALUE_DWA200221_HPP
Chris@16: # define TO_PYTHON_VALUE_DWA200221_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: 
Chris@16: # include <boost/python/refcount.hpp>
Chris@16: # include <boost/python/tag.hpp>
Chris@16: # include <boost/python/handle.hpp>
Chris@16: 
Chris@16: # include <boost/python/converter/registry.hpp>
Chris@16: # include <boost/python/converter/registered.hpp>
Chris@16: # include <boost/python/converter/builtin_converters.hpp>
Chris@16: # include <boost/python/converter/object_manager.hpp>
Chris@16: # include <boost/python/converter/shared_ptr_to_python.hpp>
Chris@16: 
Chris@16: # include <boost/python/detail/value_is_shared_ptr.hpp>
Chris@16: # include <boost/python/detail/value_arg.hpp>
Chris@16: 
Chris@16: # include <boost/type_traits/transform_traits.hpp>
Chris@16: 
Chris@16: # include <boost/mpl/if.hpp>
Chris@16: # include <boost/mpl/or.hpp>
Chris@16: # include <boost/type_traits/is_const.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python { 
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16: 
Chris@16: template <bool is_const_ref>
Chris@16: struct object_manager_get_pytype
Chris@16: {
Chris@16:    template <class U>
Chris@16:    static PyTypeObject const* get( U& (*)() =0)
Chris@16:    {
Chris@16:       return converter::object_manager_traits<U>::get_pytype();
Chris@16:    }
Chris@16: };
Chris@16: 
Chris@16: template <>
Chris@16: struct object_manager_get_pytype<true>
Chris@16: {
Chris@16:    template <class U>
Chris@16:    static PyTypeObject const* get( U const& (*)() =0)
Chris@16:    {
Chris@16:       return converter::object_manager_traits<U>::get_pytype();
Chris@16:    }
Chris@16: };
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:   template <class T>
Chris@16:   struct object_manager_to_python_value
Chris@16:   {
Chris@16:       typedef typename value_arg<T>::type argument_type;
Chris@16:     
Chris@16:       PyObject* operator()(argument_type) const;
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16:       typedef boost::mpl::bool_<is_handle<T>::value> is_t_handle;
Chris@16:       typedef boost::detail::indirect_traits::is_reference_to_const<T> is_t_const;
Chris@16:       PyTypeObject const* get_pytype() const {
Chris@16:           return get_pytype_aux((is_t_handle*)0);
Chris@16:       }
Chris@16: 
Chris@16:       inline static PyTypeObject const* get_pytype_aux(mpl::true_*) {return converter::object_manager_traits<T>::get_pytype();}
Chris@16:       
Chris@16:       inline static PyTypeObject const* get_pytype_aux(mpl::false_* ) 
Chris@16:       {
Chris@16:           return object_manager_get_pytype<is_t_const::value>::get((T(*)())0);
Chris@16:       }
Chris@16:       
Chris@16: #endif 
Chris@16: 
Chris@16:       // This information helps make_getter() decide whether to try to
Chris@16:       // return an internal reference or not. I don't like it much,
Chris@16:       // but it will have to serve for now.
Chris@16:       BOOST_STATIC_CONSTANT(bool, uses_registry = false);
Chris@16:   };
Chris@16: 
Chris@16:   
Chris@16:   template <class T>
Chris@16:   struct registry_to_python_value
Chris@16:   {
Chris@16:       typedef typename value_arg<T>::type argument_type;
Chris@16:     
Chris@16:       PyObject* operator()(argument_type) const;
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16:       PyTypeObject const* get_pytype() const {return converter::registered<T>::converters.to_python_target_type();}
Chris@16: #endif
Chris@16: 
Chris@16:       // This information helps make_getter() decide whether to try to
Chris@16:       // return an internal reference or not. I don't like it much,
Chris@16:       // but it will have to serve for now.
Chris@16:       BOOST_STATIC_CONSTANT(bool, uses_registry = true);
Chris@16:   };
Chris@16: 
Chris@16:   template <class T>
Chris@16:   struct shared_ptr_to_python_value
Chris@16:   {
Chris@16:       typedef typename value_arg<T>::type argument_type;
Chris@16:     
Chris@16:       PyObject* operator()(argument_type) const;
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16:       PyTypeObject const* get_pytype() const {return get_pytype((boost::type<argument_type>*)0);}
Chris@16: #endif 
Chris@16:       // This information helps make_getter() decide whether to try to
Chris@16:       // return an internal reference or not. I don't like it much,
Chris@16:       // but it will have to serve for now.
Chris@16:       BOOST_STATIC_CONSTANT(bool, uses_registry = false);
Chris@16:   private:
Chris@16: #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
Chris@16:       template <class U>
Chris@16:       PyTypeObject const* get_pytype(boost::type<shared_ptr<U> &> *) const {return converter::registered<U>::converters.to_python_target_type();}
Chris@16:       template <class U>
Chris@16:       PyTypeObject const* get_pytype(boost::type<const shared_ptr<U> &> *) const {return converter::registered<U>::converters.to_python_target_type();}
Chris@16: #endif
Chris@16:   };
Chris@16: }
Chris@16: 
Chris@16: template <class T>
Chris@16: struct to_python_value
Chris@16:     : mpl::if_<
Chris@16:           detail::value_is_shared_ptr<T>
Chris@16:         , detail::shared_ptr_to_python_value<T>
Chris@16:         , typename mpl::if_<
Chris@16:               mpl::or_<
Chris@16:                   converter::is_object_manager<T>
Chris@16:                 , converter::is_reference_to_object_manager<T>
Chris@16:               >
Chris@16:             , detail::object_manager_to_python_value<T>
Chris@16:             , detail::registry_to_python_value<T>
Chris@16:           >::type
Chris@16:       >::type
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: //
Chris@16: // implementation 
Chris@16: //
Chris@16: namespace detail
Chris@16: {
Chris@16:   template <class T>
Chris@16:   inline PyObject* registry_to_python_value<T>::operator()(argument_type x) const
Chris@16:   {
Chris@16:       typedef converter::registered<argument_type> r;
Chris@16: # if BOOST_WORKAROUND(__GNUC__, < 3)
Chris@16:       // suppresses an ICE, somehow
Chris@16:       (void)r::converters;
Chris@16: # endif 
Chris@16:       return converter::registered<argument_type>::converters.to_python(&x);
Chris@16:   }
Chris@16: 
Chris@16:   template <class T>
Chris@16:   inline PyObject* object_manager_to_python_value<T>::operator()(argument_type x) const
Chris@16:   {
Chris@16:       return python::upcast<PyObject>(
Chris@16:           python::xincref(
Chris@16:               get_managed_object(x, tag))
Chris@16:           );
Chris@16:   }
Chris@16: 
Chris@16:   template <class T>
Chris@16:   inline PyObject* shared_ptr_to_python_value<T>::operator()(argument_type x) const
Chris@16:   {
Chris@16:       return converter::shared_ptr_to_python(x);
Chris@16:   }
Chris@16: }
Chris@16: 
Chris@16: }} // namespace boost::python
Chris@16: 
Chris@16: #endif // TO_PYTHON_VALUE_DWA200221_HPP