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Copy pathmake_ptr_instance.hpp
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76 lines (65 loc) · 2.24 KB
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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/python/detail/type_traits.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)
{
#if defined(BOOST_NO_CXX11_SMART_PTR)
return new (storage) Holder(x);
#else
return new (storage) Holder(std::move(x));
#endif
}
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 boost::python::detail::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(boost::python::detail::true_, U const volatile* x)
{
converter::registration const* r = converter::registry::query(
type_info(typeid(*x))
);
return r ? r->m_class_object : 0;
}
template <class U>
static inline PyTypeObject* get_derived_class_object(boost::python::detail::false_, U*)
{
return 0;
}
};
}}} // namespace boost::python::object
#endif // MAKE_PTR_INSTANCE_DWA200296_HPP