// Copyright David Abrahams 2002. | |
// Distributed under the Boost Software License, Version 1.0. (See | |
// accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
#ifndef MAKE_PTR_INSTANCE_DWA200296_HPP | |
# define MAKE_PTR_INSTANCE_DWA200296_HPP | |
# include <boost/python/object/make_instance.hpp> | |
# include <boost/python/converter/registry.hpp> | |
# include <boost/type_traits/is_polymorphic.hpp> | |
# include <boost/get_pointer.hpp> | |
# include <boost/detail/workaround.hpp> | |
# include <typeinfo> | |
namespace boost { namespace python { namespace objects { | |
template <class T, class Holder> | |
struct make_ptr_instance | |
: make_instance_impl<T, Holder, make_ptr_instance<T,Holder> > | |
{ | |
template <class Arg> | |
static inline Holder* construct(void* storage, PyObject*, Arg& x) | |
{ | |
return new (storage) Holder(x); | |
} | |
template <class Ptr> | |
static inline PyTypeObject* get_class_object(Ptr const& x) | |
{ | |
return get_class_object_impl(get_pointer(x)); | |
} | |
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES | |
static inline PyTypeObject const* get_pytype() | |
{ | |
return converter::registered<T>::converters.get_class_object(); | |
} | |
#endif | |
private: | |
template <class U> | |
static inline PyTypeObject* get_class_object_impl(U const volatile* p) | |
{ | |
if (p == 0) | |
return 0; // means "return None". | |
PyTypeObject* derived = get_derived_class_object( | |
BOOST_DEDUCED_TYPENAME is_polymorphic<U>::type(), p); | |
if (derived) | |
return derived; | |
return converter::registered<T>::converters.get_class_object(); | |
} | |
template <class U> | |
static inline PyTypeObject* get_derived_class_object(mpl::true_, U const volatile* x) | |
{ | |
converter::registration const* r = converter::registry::query( | |
type_info(typeid(*get_pointer(x))) | |
); | |
return r ? r->m_class_object : 0; | |
} | |
template <class U> | |
static inline PyTypeObject* get_derived_class_object(mpl::false_, U*) | |
{ | |
return 0; | |
} | |
}; | |
}}} // namespace boost::python::object | |
#endif // MAKE_PTR_INSTANCE_DWA200296_HPP |