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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 REGISTRATIONS_DWA2002223_HPP | |
6 | # define REGISTRATIONS_DWA2002223_HPP | |
7 | ||
8 | # include <boost/python/detail/prefix.hpp> | |
9 | ||
10 | # include <boost/python/type_id.hpp> | |
11 | ||
12 | # include <boost/python/converter/convertible_function.hpp> | |
13 | # include <boost/python/converter/constructor_function.hpp> | |
14 | # include <boost/python/converter/to_python_function_type.hpp> | |
15 | ||
16 | # include <boost/detail/workaround.hpp> | |
17 | ||
18 | namespace boost { namespace python { namespace converter { | |
19 | ||
20 | struct lvalue_from_python_chain | |
21 | { | |
22 | convertible_function convert; | |
23 | lvalue_from_python_chain* next; | |
24 | }; | |
25 | ||
26 | struct rvalue_from_python_chain | |
27 | { | |
28 | convertible_function convertible; | |
29 | constructor_function construct; | |
30 | PyTypeObject const* (*expected_pytype)(); | |
31 | rvalue_from_python_chain* next; | |
32 | }; | |
33 | ||
34 | struct BOOST_PYTHON_DECL registration | |
35 | { | |
36 | public: // member functions | |
37 | explicit registration(type_info target, bool is_shared_ptr = false); | |
38 | ~registration(); | |
39 | ||
40 | // Convert the appropriately-typed data to Python | |
41 | PyObject* to_python(void const volatile*) const; | |
42 | ||
43 | // Return the class object, or raise an appropriate Python | |
44 | // exception if no class has been registered. | |
45 | PyTypeObject* get_class_object() const; | |
46 | ||
47 | // Return common denominator of the python class objects, | |
48 | // convertable to target. Inspects the m_class_object and the value_chains. | |
49 | PyTypeObject const* expected_from_python_type() const; | |
50 | PyTypeObject const* to_python_target_type() const; | |
51 | ||
52 | public: // data members. So sue me. | |
53 | const python::type_info target_type; | |
54 | ||
55 | // The chain of eligible from_python converters when an lvalue is required | |
56 | lvalue_from_python_chain* lvalue_chain; | |
57 | ||
58 | // The chain of eligible from_python converters when an rvalue is acceptable | |
59 | rvalue_from_python_chain* rvalue_chain; | |
60 | ||
61 | // The class object associated with this type | |
62 | PyTypeObject* m_class_object; | |
63 | ||
64 | // The unique to_python converter for the associated C++ type. | |
65 | to_python_function_t m_to_python; | |
66 | PyTypeObject const* (*m_to_python_target_type)(); | |
67 | ||
68 | ||
69 | // True iff this type is a shared_ptr. Needed for special rvalue | |
70 | // from_python handling. | |
71 | const bool is_shared_ptr; | |
72 | ||
73 | # if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) | |
74 | private: | |
75 | void operator=(registration); // This is not defined, and just keeps MWCW happy. | |
76 | # endif | |
77 | }; | |
78 | ||
79 | // | |
80 | // implementations | |
81 | // | |
82 | inline registration::registration(type_info target_type, bool is_shared_ptr) | |
83 | : target_type(target_type) | |
84 | , lvalue_chain(0) | |
85 | , rvalue_chain(0) | |
86 | , m_class_object(0) | |
87 | , m_to_python(0) | |
88 | , m_to_python_target_type(0) | |
89 | , is_shared_ptr(is_shared_ptr) | |
90 | {} | |
91 | ||
92 | inline bool operator<(registration const& lhs, registration const& rhs) | |
93 | { | |
94 | return lhs.target_type < rhs.target_type; | |
95 | } | |
96 | ||
97 | }}} // namespace boost::python::converter | |
98 | ||
99 | #endif // REGISTRATIONS_DWA2002223_HPP |