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// Copyright David Abrahams 2004. 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 WRAPPER_BASE_DWA2004722_HPP
# define WRAPPER_BASE_DWA2004722_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/type_traits/is_polymorphic.hpp>
# include <boost/mpl/bool.hpp>
namespace boost { namespace python {
class override;
namespace detail
{
class BOOST_PYTHON_DECL_FORWARD wrapper_base;
namespace wrapper_base_ // ADL disabler
{
inline PyObject* get_owner(wrapper_base const volatile& w);
inline PyObject*
owner_impl(void const volatile* /*x*/, mpl::false_)
{
return 0;
}
template <class T>
inline PyObject*
owner_impl(T const volatile* x, mpl::true_);
template <class T>
inline PyObject*
owner(T const volatile* x)
{
return wrapper_base_::owner_impl(x,is_polymorphic<T>());
}
}
class BOOST_PYTHON_DECL wrapper_base
{
friend void initialize_wrapper(PyObject* self, wrapper_base* w);
friend PyObject* wrapper_base_::get_owner(wrapper_base const volatile& w);
protected:
wrapper_base() : m_self(0) {}
override get_override(
char const* name, PyTypeObject* class_object) const;
private:
void detach();
private:
PyObject* m_self;
};
namespace wrapper_base_ // ADL disabler
{
template <class T>
inline PyObject*
owner_impl(T const volatile* x, mpl::true_)
{
if (wrapper_base const volatile* w = dynamic_cast<wrapper_base const volatile*>(x))
{
return wrapper_base_::get_owner(*w);
}
return 0;
}
inline PyObject* get_owner(wrapper_base const volatile& w)
{
return w.m_self;
}
}
inline void initialize_wrapper(PyObject* self, wrapper_base* w)
{
w->m_self = self;
}
inline void initialize_wrapper(PyObject* /*self*/, ...) {}
} // namespace detail
}} // namespace boost::python
#endif // WRAPPER_BASE_DWA2004722_HPP