91 lines
2.2 KiB
Plaintext
91 lines
2.2 KiB
Plaintext
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// Copyright David Abrahams 2004. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef WRAPPER_BASE_DWA2004722_HPP
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# define WRAPPER_BASE_DWA2004722_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/type_traits/is_polymorphic.hpp>
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# include <boost/mpl/bool.hpp>
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namespace boost { namespace python {
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class override;
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namespace detail
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{
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class BOOST_PYTHON_DECL_FORWARD wrapper_base;
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namespace wrapper_base_ // ADL disabler
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{
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inline PyObject* get_owner(wrapper_base const volatile& w);
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inline PyObject*
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owner_impl(void const volatile* /*x*/, mpl::false_)
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{
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return 0;
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}
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template <class T>
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inline PyObject*
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owner_impl(T const volatile* x, mpl::true_);
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template <class T>
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inline PyObject*
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owner(T const volatile* x)
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{
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return wrapper_base_::owner_impl(x,is_polymorphic<T>());
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}
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}
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class BOOST_PYTHON_DECL wrapper_base
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{
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friend void initialize_wrapper(PyObject* self, wrapper_base* w);
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friend PyObject* wrapper_base_::get_owner(wrapper_base const volatile& w);
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protected:
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wrapper_base() : m_self(0) {}
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override get_override(
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char const* name, PyTypeObject* class_object) const;
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private:
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void detach();
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private:
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PyObject* m_self;
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};
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namespace wrapper_base_ // ADL disabler
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{
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template <class T>
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inline PyObject*
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owner_impl(T const volatile* x, mpl::true_)
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{
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if (wrapper_base const volatile* w = dynamic_cast<wrapper_base const volatile*>(x))
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{
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return wrapper_base_::get_owner(*w);
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}
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return 0;
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}
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inline PyObject* get_owner(wrapper_base const volatile& w)
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{
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return w.m_self;
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}
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}
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inline void initialize_wrapper(PyObject* self, wrapper_base* w)
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{
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w->m_self = self;
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}
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inline void initialize_wrapper(PyObject* /*self*/, ...) {}
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} // namespace detail
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}} // namespace boost::python
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#endif // WRAPPER_BASE_DWA2004722_HPP
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