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 27 namespace 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 52 template < 53 class R 54 BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A) 55 > 56 typename detail::returnable<R>::type 57 call(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