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1 | // Copyright David Abrahams 2004. Distributed under the Boost |
2 | // Software License, Version 1.0. (See accompanying | |
3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
4 | #ifndef WRAPPER_BASE_DWA2004722_HPP | |
5 | # define WRAPPER_BASE_DWA2004722_HPP | |
6 | ||
7 | # include <boost/python/detail/prefix.hpp> | |
8 | # include <boost/type_traits/is_polymorphic.hpp> | |
9 | # include <boost/mpl/bool.hpp> | |
10 | ||
11 | namespace boost { namespace python { | |
12 | ||
13 | class override; | |
14 | ||
15 | namespace detail | |
16 | { | |
17 | class BOOST_PYTHON_DECL_FORWARD wrapper_base; | |
18 | ||
19 | namespace wrapper_base_ // ADL disabler | |
20 | { | |
21 | inline PyObject* get_owner(wrapper_base const volatile& w); | |
22 | ||
23 | inline PyObject* | |
24 | owner_impl(void const volatile* /*x*/, mpl::false_) | |
25 | { | |
26 | return 0; | |
27 | } | |
28 | ||
29 | template <class T> | |
30 | inline PyObject* | |
31 | owner_impl(T const volatile* x, mpl::true_); | |
32 | ||
33 | template <class T> | |
34 | inline PyObject* | |
35 | owner(T const volatile* x) | |
36 | { | |
37 | return wrapper_base_::owner_impl(x,is_polymorphic<T>()); | |
38 | } | |
39 | } | |
40 | ||
41 | class BOOST_PYTHON_DECL wrapper_base | |
42 | { | |
43 | friend void initialize_wrapper(PyObject* self, wrapper_base* w); | |
44 | friend PyObject* wrapper_base_::get_owner(wrapper_base const volatile& w); | |
45 | protected: | |
46 | wrapper_base() : m_self(0) {} | |
47 | ||
48 | override get_override( | |
49 | char const* name, PyTypeObject* class_object) const; | |
50 | ||
51 | private: | |
52 | void detach(); | |
53 | ||
54 | private: | |
55 | PyObject* m_self; | |
56 | }; | |
57 | ||
58 | namespace wrapper_base_ // ADL disabler | |
59 | { | |
60 | template <class T> | |
61 | inline PyObject* | |
62 | owner_impl(T const volatile* x, mpl::true_) | |
63 | { | |
64 | if (wrapper_base const volatile* w = dynamic_cast<wrapper_base const volatile*>(x)) | |
65 | { | |
66 | return wrapper_base_::get_owner(*w); | |
67 | } | |
68 | return 0; | |
69 | } | |
70 | ||
71 | inline PyObject* get_owner(wrapper_base const volatile& w) | |
72 | { | |
73 | return w.m_self; | |
74 | } | |
75 | } | |
76 | ||
77 | inline void initialize_wrapper(PyObject* self, wrapper_base* w) | |
78 | { | |
79 | w->m_self = self; | |
80 | } | |
81 | ||
82 | inline void initialize_wrapper(PyObject* /*self*/, ...) {} | |
83 | ||
84 | ||
85 | ||
86 | } // namespace detail | |
87 | ||
88 | }} // namespace boost::python | |
89 | ||
90 | #endif // WRAPPER_BASE_DWA2004722_HPP |