python/include/boost/python/object/make_ptr_instance.hpp at develop · corngood/python · GitHub

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// 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

python/include/boost/python/object/make_ptr_instance.hpp at develop · corngood/python · GitHub

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