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 CALL_DWA2002411_HPP
9# define CALL_DWA2002411_HPP
10
11# include <boost/python/detail/prefix.hpp>
12
13# include <boost/type.hpp>
14
15# include <boost/python/converter/arg_to_python.hpp>
16# include <boost/python/converter/return_from_python.hpp>
17# include <boost/python/detail/preprocessor.hpp>
18# include <boost/python/detail/void_return.hpp>
19
20# include <boost/preprocessor/comma_if.hpp>
21# include <boost/preprocessor/iterate.hpp>
22# include <boost/preprocessor/repeat.hpp>
23# include <boost/preprocessor/debug/line.hpp>
24# include <boost/preprocessor/repetition/enum_trailing_params.hpp>
25# include <boost/preprocessor/repetition/enum_binary_params.hpp>
26
27namespace boost { namespace python {
28
29# define BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET(z, n, _) \
30 , converter::arg_to_python<A##n>(a##n).get()
31
32# define BOOST_PP_ITERATION_PARAMS_1 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/call.hpp>))
33# include BOOST_PP_ITERATE()
34
35# undef BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET
36
37}} // namespace boost::python
38
39# endif // CALL_DWA2002411_HPP
40
41// For gcc 4.4 compatability, we must include the
42// BOOST_PP_ITERATION_DEPTH test inside an #else clause.
43#else // BOOST_PP_IS_ITERATING
44#if BOOST_PP_ITERATION_DEPTH() == 1
45# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \
46 && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
47# line BOOST_PP_LINE(__LINE__, call.hpp)
48# endif
49
50# define N BOOST_PP_ITERATION()
51
52template <
53 class R
54 BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)
55 >
56typename detail::returnable<R>::type
57call(PyObject* callable
58 BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, const& a)
59 , boost::type<R>* = 0
60 )
61{
62 PyObject* const result =
63 PyEval_CallFunction(
64 callable
65 , const_cast<char*>("(" BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FIXED, "O") ")")
66 BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET, nil)
67 );
68
69 // This conversion *must not* be done in the same expression as
70 // the call, because, in the special case where the result is a
71 // reference a Python object which was created by converting a C++
72 // argument for passing to PyEval_CallFunction, its reference
73 // count will be 2 until the end of the full expression containing
74 // the conversion, and that interferes with dangling
75 // pointer/reference detection.
76 converter::return_from_python<R> converter;
77 return converter(result);
78}
79
80# undef N
81
82#endif // BOOST_PP_ITERATION_DEPTH()
83#endif
84

source code of boost/boost/python/call.hpp