1 // Copyright David Abrahams 2002.
2 // Distributed under the Boost Software License, Version 1.0. (See
3 // accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5 #ifndef MAKE_PTR_INSTANCE_DWA200296_HPP
6 # define MAKE_PTR_INSTANCE_DWA200296_HPP
8 # include <boost/python/object/make_instance.hpp>
9 # include <boost/python/converter/registry.hpp>
10 # include <boost/type_traits/is_polymorphic.hpp>
11 # include <boost/get_pointer.hpp>
12 # include <boost/detail/workaround.hpp>
15 namespace boost { namespace python { namespace objects {
17 template <class T, class Holder>
18 struct make_ptr_instance
19 : make_instance_impl<T, Holder, make_ptr_instance<T,Holder> >
22 static inline Holder* construct(void* storage, PyObject*, Arg& x)
24 #if __cplusplus < 201103L
25 return new (storage) Holder(x);
27 return new (storage) Holder(std::move(x));
32 static inline PyTypeObject* get_class_object(Ptr const& x)
34 return get_class_object_impl(get_pointer(x));
36 #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
37 static inline PyTypeObject const* get_pytype()
39 return converter::registered<T>::converters.get_class_object();
44 static inline PyTypeObject* get_class_object_impl(U const volatile* p)
47 return 0; // means "return None".
49 PyTypeObject* derived = get_derived_class_object(
50 BOOST_DEDUCED_TYPENAME is_polymorphic<U>::type(), p);
54 return converter::registered<T>::converters.get_class_object();
58 static inline PyTypeObject* get_derived_class_object(mpl::true_, U const volatile* x)
60 converter::registration const* r = converter::registry::query(
61 type_info(typeid(*get_pointer(x)))
63 return r ? r->m_class_object : 0;
67 static inline PyTypeObject* get_derived_class_object(mpl::false_, U*)
74 }}} // namespace boost::python::object
76 #endif // MAKE_PTR_INSTANCE_DWA200296_HPP