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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 | # ifndef INVOKE_DWA20021122_HPP | |
8 | # define INVOKE_DWA20021122_HPP | |
9 | ||
10 | # include <boost/python/detail/prefix.hpp> | |
11 | # include <boost/python/detail/preprocessor.hpp> | |
12 | # include <boost/python/detail/none.hpp> | |
13 | ||
14 | # include <boost/type_traits/is_member_function_pointer.hpp> | |
15 | ||
16 | # include <boost/preprocessor/iterate.hpp> | |
17 | # include <boost/preprocessor/facilities/intercept.hpp> | |
18 | # include <boost/preprocessor/repetition/enum_trailing_params.hpp> | |
19 | # include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp> | |
20 | # include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
21 | # include <boost/python/to_python_value.hpp> | |
22 | ||
23 | // This file declares a series of overloaded invoke(...) functions, | |
24 | // used to invoke wrapped C++ function (object)s from Python. Each one | |
25 | // accepts: | |
26 | // | |
27 | // - a tag which identifies the invocation syntax (e.g. member | |
28 | // functions must be invoked with a different syntax from regular | |
29 | // functions) | |
30 | // | |
31 | // - a pointer to a result converter type, used solely as a way of | |
32 | // transmitting the type of the result converter to the function (or | |
33 | // an int, if the return type is void). | |
34 | // | |
35 | // - the "function", which may be a function object, a function or | |
36 | // member function pointer, or a defaulted_virtual_fn. | |
37 | // | |
38 | // - The arg_from_python converters for each of the arguments to be | |
39 | // passed to the function being invoked. | |
40 | ||
41 | namespace boost { namespace python { namespace detail { | |
42 | ||
43 | // This "result converter" is really just used as a dispatch tag to | |
44 | // invoke(...), selecting the appropriate implementation | |
45 | typedef int void_result_to_python; | |
46 | ||
47 | template <bool void_return, bool member> | |
48 | struct invoke_tag_ {}; | |
49 | ||
50 | // A metafunction returning the appropriate tag type for invoking an | |
51 | // object of type F with return type R. | |
52 | template <class R, class F> | |
53 | struct invoke_tag | |
54 | : invoke_tag_< | |
55 | is_same<R,void>::value | |
56 | , is_member_function_pointer<F>::value | |
57 | > | |
58 | { | |
59 | }; | |
60 | ||
61 | # define BOOST_PP_ITERATION_PARAMS_1 \ | |
62 | (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/detail/invoke.hpp>)) | |
63 | # include BOOST_PP_ITERATE() | |
64 | ||
65 | }}} // namespace boost::python::detail | |
66 | ||
67 | # endif // INVOKE_DWA20021122_HPP | |
68 | #else | |
69 | ||
70 | # define N BOOST_PP_ITERATION() | |
71 | ||
72 | template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)> | |
73 | inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) ) | |
74 | { | |
75 | return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) )); | |
76 | } | |
77 | ||
78 | template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)> | |
79 | inline PyObject* invoke(invoke_tag_<true,false>, RC const&, F& f BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) ) | |
80 | { | |
81 | f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT) ); | |
82 | return none(); | |
83 | } | |
84 | ||
85 | template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)> | |
86 | inline PyObject* invoke(invoke_tag_<false,true>, RC const& rc, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) ) | |
87 | { | |
88 | return rc( (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)) ); | |
89 | } | |
90 | ||
91 | template <class RC, class F, class TC BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)> | |
92 | inline PyObject* invoke(invoke_tag_<true,true>, RC const&, F& f, TC& tc BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) ) | |
93 | { | |
94 | (tc().*f)(BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, () BOOST_PP_INTERCEPT)); | |
95 | return none(); | |
96 | } | |
97 | ||
98 | # undef N | |
99 | ||
100 | #endif // BOOST_PP_IS_ITERATING |