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1 | // Copyright David Abrahams 2002. |
2 | // Distributed under the Boost Software License, Version 1.0. (See | |
3 | // accompanying file LICENSE_1_0.txt or copy at | |
4 | // http://www.boost.org/LICENSE_1_0.txt) | |
5 | #ifndef TO_PYTHON_INDIRECT_DWA200221_HPP | |
6 | # define TO_PYTHON_INDIRECT_DWA200221_HPP | |
7 | ||
8 | # include <boost/python/detail/prefix.hpp> | |
9 | ||
10 | # include <boost/python/object/pointer_holder.hpp> | |
11 | # include <boost/python/object/make_ptr_instance.hpp> | |
12 | ||
13 | # include <boost/python/detail/none.hpp> | |
14 | ||
15 | #ifndef BOOST_PYTHON_NO_PY_SIGNATURES | |
16 | # include <boost/python/converter/pytype_function.hpp> | |
17 | #endif | |
18 | ||
19 | # include <boost/python/refcount.hpp> | |
20 | ||
21 | # include <boost/type_traits/is_pointer.hpp> | |
22 | # include <boost/type_traits/is_polymorphic.hpp> | |
23 | ||
24 | # include <boost/mpl/bool.hpp> | |
25 | ||
26 | # if defined(__ICL) && __ICL < 600 | |
27 | # include <boost/shared_ptr.hpp> | |
28 | # else | |
29 | # include <memory> | |
30 | # endif | |
31 | ||
32 | namespace boost { namespace python { | |
33 | ||
34 | template <class T, class MakeHolder> | |
35 | struct to_python_indirect | |
36 | { | |
37 | template <class U> | |
38 | inline PyObject* | |
39 | operator()(U const& ref) const | |
40 | { | |
41 | return this->execute(const_cast<U&>(ref), is_pointer<U>()); | |
42 | } | |
43 | #ifndef BOOST_PYTHON_NO_PY_SIGNATURES | |
44 | inline PyTypeObject const* | |
45 | get_pytype()const | |
46 | { | |
47 | return converter::registered_pytype<T>::get_pytype(); | |
48 | } | |
49 | #endif | |
50 | private: | |
51 | template <class U> | |
52 | inline PyObject* execute(U* ptr, mpl::true_) const | |
53 | { | |
54 | // No special NULL treatment for references | |
55 | if (ptr == 0) | |
56 | return python::detail::none(); | |
57 | else | |
58 | return this->execute(*ptr, mpl::false_()); | |
59 | } | |
60 | ||
61 | template <class U> | |
62 | inline PyObject* execute(U const& x, mpl::false_) const | |
63 | { | |
64 | U* const p = &const_cast<U&>(x); | |
65 | if (is_polymorphic<U>::value) | |
66 | { | |
67 | if (PyObject* o = detail::wrapper_base_::owner(p)) | |
68 | return incref(o); | |
69 | } | |
70 | return MakeHolder::execute(p); | |
71 | } | |
72 | }; | |
73 | ||
74 | // | |
75 | // implementations | |
76 | // | |
77 | namespace detail | |
78 | { | |
79 | struct make_owning_holder | |
80 | { | |
81 | template <class T> | |
82 | static PyObject* execute(T* p) | |
83 | { | |
84 | // can't use auto_ptr with Intel 5 and VC6 Dinkum library | |
85 | // for some reason. We get link errors against the auto_ptr | |
86 | // copy constructor. | |
87 | # if defined(__ICL) && __ICL < 600 | |
88 | typedef boost::shared_ptr<T> smart_pointer; | |
89 | # elif __cplusplus < 201103L | |
90 | typedef std::auto_ptr<T> smart_pointer; | |
91 | # else | |
92 | typedef std::unique_ptr<T> smart_pointer; | |
93 | # endif | |
94 | typedef objects::pointer_holder<smart_pointer, T> holder_t; | |
95 | ||
96 | smart_pointer ptr(const_cast<T*>(p)); | |
97 | return objects::make_ptr_instance<T, holder_t>::execute(ptr); | |
98 | } | |
99 | }; | |
100 | ||
101 | struct make_reference_holder | |
102 | { | |
103 | template <class T> | |
104 | static PyObject* execute(T* p) | |
105 | { | |
106 | typedef objects::pointer_holder<T*, T> holder_t; | |
107 | T* q = const_cast<T*>(p); | |
108 | return objects::make_ptr_instance<T, holder_t>::execute(q); | |
109 | } | |
110 | }; | |
111 | } | |
112 | ||
113 | }} // namespace boost::python | |
114 | ||
115 | #endif // TO_PYTHON_INDIRECT_DWA200221_HPP |