77 lines
2.3 KiB
Plaintext
77 lines
2.3 KiB
Plaintext
// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef MAKE_PTR_INSTANCE_DWA200296_HPP
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# define MAKE_PTR_INSTANCE_DWA200296_HPP
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# include <boost/python/object/make_instance.hpp>
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# include <boost/python/converter/registry.hpp>
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# include <boost/type_traits/is_polymorphic.hpp>
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# include <boost/get_pointer.hpp>
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# include <boost/detail/workaround.hpp>
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# include <typeinfo>
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namespace boost { namespace python { namespace objects {
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template <class T, class Holder>
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struct make_ptr_instance
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: make_instance_impl<T, Holder, make_ptr_instance<T,Holder> >
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{
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template <class Arg>
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static inline Holder* construct(void* storage, PyObject*, Arg& x)
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{
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#if __cplusplus < 201103L
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return new (storage) Holder(x);
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#else
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return new (storage) Holder(std::move(x));
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#endif
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}
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template <class Ptr>
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static inline PyTypeObject* get_class_object(Ptr const& x)
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{
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return get_class_object_impl(get_pointer(x));
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}
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#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
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static inline PyTypeObject const* get_pytype()
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{
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return converter::registered<T>::converters.get_class_object();
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}
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#endif
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private:
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template <class U>
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static inline PyTypeObject* get_class_object_impl(U const volatile* p)
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{
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if (p == 0)
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return 0; // means "return None".
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PyTypeObject* derived = get_derived_class_object(
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BOOST_DEDUCED_TYPENAME is_polymorphic<U>::type(), p);
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if (derived)
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return derived;
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return converter::registered<T>::converters.get_class_object();
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}
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template <class U>
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static inline PyTypeObject* get_derived_class_object(mpl::true_, U const volatile* x)
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{
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converter::registration const* r = converter::registry::query(
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type_info(typeid(*get_pointer(x)))
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);
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return r ? r->m_class_object : 0;
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}
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template <class U>
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static inline PyTypeObject* get_derived_class_object(mpl::false_, U*)
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{
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return 0;
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}
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};
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}}} // namespace boost::python::object
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#endif // MAKE_PTR_INSTANCE_DWA200296_HPP
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