1 #if !defined(BOOST_PP_IS_ITERATING)
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)
8 # ifndef CALL_DWA2002411_HPP
9 # define CALL_DWA2002411_HPP
11 # include <boost/python/detail/prefix.hpp>
13 # include <boost/type.hpp>
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>
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>
27 namespace boost { namespace python {
29 # define BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET(z, n, _) \
30 , converter::arg_to_python<A##n>(a##n).get()
32 # define BOOST_PP_ITERATION_PARAMS_1 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/call.hpp>))
33 # include BOOST_PP_ITERATE()
35 # undef BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET
37 }} // namespace boost::python
39 # endif // CALL_DWA2002411_HPP
41 #elif BOOST_PP_ITERATION_DEPTH() == 1
42 # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \
43 && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
44 # line BOOST_PP_LINE(__LINE__, call.hpp)
47 # define N BOOST_PP_ITERATION()
51 BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)
53 typename detail::returnable<R>::type
54 call(PyObject* callable
55 BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, const& a)
59 PyObject* const result =
62 , const_cast<char*>("(" BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FIXED, "O") ")")
63 BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET, nil)
66 // This conversion *must not* be done in the same expression as
67 // the call, because, in the special case where the result is a
68 // reference a Python object which was created by converting a C++
69 // argument for passing to PyEval_CallFunction, its reference
70 // count will be 2 until the end of the full expression containing
71 // the conversion, and that interferes with dangling
72 // pointer/reference detection.
73 converter::return_from_python<R> converter;
74 return converter(result);