| // 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 |