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72 lines
2.1 KiB
72 lines
2.1 KiB
// 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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return new (storage) Holder(x); |
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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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