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1 | #if !defined(BOOST_PP_IS_ITERATING) |
2 | ||
3 | // Copyright David Abrahams 2002. | |
4 | // Distributed under the Boost Software License, Version 1.0. (See | |
5 | // accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | ||
8 | # ifndef RESULT_DWA2002521_HPP | |
9 | # define RESULT_DWA2002521_HPP | |
10 | ||
11 | # include <boost/type.hpp> | |
12 | ||
13 | # include <boost/python/detail/preprocessor.hpp> | |
14 | ||
15 | # include <boost/type_traits/object_traits.hpp> | |
16 | # include <boost/mpl/if.hpp> | |
17 | ||
18 | # include <boost/preprocessor/comma_if.hpp> | |
19 | # include <boost/preprocessor/iterate.hpp> | |
20 | # include <boost/preprocessor/debug/line.hpp> | |
21 | # include <boost/preprocessor/enum_params.hpp> | |
22 | # include <boost/preprocessor/repetition/enum_trailing_params.hpp> | |
23 | ||
24 | namespace boost { namespace python { namespace detail { | |
25 | ||
26 | // Defines a family of overloaded function which, given x, a function | |
27 | // pointer, member [function] pointer, or an AdaptableFunction object, | |
28 | // returns a pointer to type<R>*, where R is the result type of | |
29 | // invoking the result of bind(x). | |
30 | // | |
31 | // In order to work around bugs in deficient compilers, if x might be | |
32 | // an AdaptableFunction object, you must pass OL as a second argument | |
33 | // to get this to work portably. | |
34 | ||
35 | # define BOOST_PP_ITERATION_PARAMS_1 \ | |
36 | (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>, BOOST_PYTHON_FUNCTION_POINTER)) | |
37 | # include BOOST_PP_ITERATE() | |
38 | ||
39 | # define BOOST_PP_ITERATION_PARAMS_1 \ | |
40 | (4, (0, BOOST_PYTHON_CV_COUNT - 1, <boost/python/detail/result.hpp>, BOOST_PYTHON_POINTER_TO_MEMBER)) | |
41 | # include BOOST_PP_ITERATE() | |
42 | ||
43 | template <class R, class T> | |
44 | boost::type<R>* result(R (T::*), int = 0) { return 0; } | |
45 | ||
46 | # if (defined(__MWERKS__) && __MWERKS__ < 0x3000) | |
47 | // This code actually works on all implementations, but why use it when we don't have to? | |
48 | template <class T> | |
49 | struct get_result_type | |
50 | { | |
51 | typedef boost::type<typename T::result_type> type; | |
52 | }; | |
53 | ||
54 | struct void_type | |
55 | { | |
56 | typedef void type; | |
57 | }; | |
58 | ||
59 | template <class T> | |
60 | struct result_result | |
61 | { | |
62 | typedef typename mpl::if_c< | |
63 | is_class<T>::value | |
64 | , get_result_type<T> | |
65 | , void_type | |
66 | >::type t1; | |
67 | ||
68 | typedef typename t1::type* type; | |
69 | }; | |
70 | ||
71 | template <class X> | |
72 | typename result_result<X>::type | |
73 | result(X const&, short) { return 0; } | |
74 | ||
75 | # else // Simpler code for more-capable compilers | |
76 | template <class X> | |
77 | boost::type<typename X::result_type>* | |
78 | result(X const&, short = 0) { return 0; } | |
79 | ||
80 | # endif | |
81 | ||
82 | }}} // namespace boost::python::detail | |
83 | ||
84 | # endif // RESULT_DWA2002521_HPP | |
85 | ||
86 | /* --------------- function pointers --------------- */ | |
87 | // For gcc 4.4 compatability, we must include the | |
88 | // BOOST_PP_ITERATION_DEPTH test inside an #else clause. | |
89 | #else // BOOST_PP_IS_ITERATING | |
90 | #if BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_FUNCTION_POINTER | |
91 | # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \ | |
92 | && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201))) | |
93 | # line BOOST_PP_LINE(__LINE__, result.hpp(function pointers)) | |
94 | # endif | |
95 | ||
96 | # define N BOOST_PP_ITERATION() | |
97 | ||
98 | template <class R BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)> | |
99 | boost::type<R>* result(R (*)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)), int = 0) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | # undef N | |
105 | ||
106 | /* --------------- pointers-to-members --------------- */ | |
107 | #elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == BOOST_PYTHON_POINTER_TO_MEMBER | |
108 | // Outer over cv-qualifiers | |
109 | ||
110 | # define BOOST_PP_ITERATION_PARAMS_2 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/result.hpp>)) | |
111 | # include BOOST_PP_ITERATE() | |
112 | ||
113 | #elif BOOST_PP_ITERATION_DEPTH() == 2 | |
114 | # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \ | |
115 | && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201))) | |
116 | # line BOOST_PP_LINE(__LINE__, result.hpp(pointers-to-members)) | |
117 | # endif | |
118 | // Inner over arities | |
119 | ||
120 | # define N BOOST_PP_ITERATION() | |
121 | # define Q BOOST_PYTHON_CV_QUALIFIER(BOOST_PP_RELATIVE_ITERATION(1)) | |
122 | ||
123 | template <class R, class T BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)> | |
124 | boost::type<R>* result(R (T::*)(BOOST_PP_ENUM_PARAMS_Z(1, N, A)) Q, int = 0) | |
125 | { | |
126 | return 0; | |
127 | } | |
128 | ||
129 | # undef N | |
130 | # undef Q | |
131 | ||
132 | #endif // BOOST_PP_ITERATION_DEPTH() | |
133 | #endif |