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
8 # include <boost/python/detail/prefix.hpp>
10 # include <boost/python/object/pointer_holder.hpp>
11 # include <boost/python/object/make_ptr_instance.hpp>
13 # include <boost/python/detail/none.hpp>
15 #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
16 # include <boost/python/converter/pytype_function.hpp>
19 # include <boost/python/refcount.hpp>
21 # include <boost/type_traits/is_pointer.hpp>
22 # include <boost/type_traits/is_polymorphic.hpp>
24 # include <boost/mpl/bool.hpp>
26 # if defined(__ICL) && __ICL < 600
27 # include <boost/shared_ptr.hpp>
32 namespace boost { namespace python {
34 template <class T, class MakeHolder>
35 struct to_python_indirect
39 operator()(U const& ref) const
41 return this->execute(const_cast<U&>(ref), is_pointer<U>());
43 #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
44 inline PyTypeObject const*
47 return converter::registered_pytype<T>::get_pytype();
52 inline PyObject* execute(U* ptr, mpl::true_) const
54 // No special NULL treatment for references
56 return python::detail::none();
58 return this->execute(*ptr, mpl::false_());
62 inline PyObject* execute(U const& x, mpl::false_) const
64 U* const p = &const_cast<U&>(x);
65 if (is_polymorphic<U>::value)
67 if (PyObject* o = detail::wrapper_base_::owner(p))
70 return MakeHolder::execute(p);
79 struct make_owning_holder
82 static PyObject* execute(T* p)
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
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;
92 typedef std::unique_ptr<T> smart_pointer;
94 typedef objects::pointer_holder<smart_pointer, T> holder_t;
96 smart_pointer ptr(const_cast<T*>(p));
97 return objects::make_ptr_instance<T, holder_t>::execute(ptr);
101 struct make_reference_holder
104 static PyObject* execute(T* p)
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);
113 }} // namespace boost::python
115 #endif // TO_PYTHON_INDIRECT_DWA200221_HPP