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1 #if !defined(BOOST_PP_IS_ITERATING) |
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2 |
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3 // Copyright David Abrahams 2002. |
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4 // Distributed under the Boost Software License, Version 1.0. (See |
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5 // accompanying file LICENSE_1_0.txt or copy at |
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6 // http://www.boost.org/LICENSE_1_0.txt) |
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7 |
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8 # ifndef CALL_DWA2002411_HPP |
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9 # define CALL_DWA2002411_HPP |
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10 |
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11 # include <boost/python/detail/prefix.hpp> |
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12 |
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13 # include <boost/type.hpp> |
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14 |
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15 # include <boost/python/converter/arg_to_python.hpp> |
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16 # include <boost/python/converter/return_from_python.hpp> |
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17 # include <boost/python/detail/preprocessor.hpp> |
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18 # include <boost/python/detail/void_return.hpp> |
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19 |
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20 # include <boost/preprocessor/comma_if.hpp> |
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21 # include <boost/preprocessor/iterate.hpp> |
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22 # include <boost/preprocessor/repeat.hpp> |
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23 # include <boost/preprocessor/debug/line.hpp> |
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24 # include <boost/preprocessor/repetition/enum_trailing_params.hpp> |
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25 # include <boost/preprocessor/repetition/enum_binary_params.hpp> |
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26 |
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27 namespace boost { namespace python { |
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28 |
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29 # define BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET(z, n, _) \ |
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30 , converter::arg_to_python<A##n>(a##n).get() |
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31 |
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32 # define BOOST_PP_ITERATION_PARAMS_1 (3, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/call.hpp>)) |
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33 # include BOOST_PP_ITERATE() |
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34 |
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35 # undef BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET |
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36 |
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37 }} // namespace boost::python |
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38 |
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39 # endif // CALL_DWA2002411_HPP |
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40 |
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41 #elif BOOST_PP_ITERATION_DEPTH() == 1 |
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42 # if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100) \ |
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43 && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201))) |
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44 # line BOOST_PP_LINE(__LINE__, call.hpp) |
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45 # endif |
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46 |
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47 # define N BOOST_PP_ITERATION() |
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48 |
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49 template < |
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50 class R |
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51 BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A) |
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52 > |
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53 typename detail::returnable<R>::type |
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54 call(PyObject* callable |
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55 BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, const& a) |
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56 , boost::type<R>* = 0 |
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57 ) |
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58 { |
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59 PyObject* const result = |
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60 PyEval_CallFunction( |
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61 callable |
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62 , const_cast<char*>("(" BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FIXED, "O") ")") |
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63 BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET, nil) |
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64 ); |
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65 |
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66 // This conversion *must not* be done in the same expression as |
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67 // the call, because, in the special case where the result is a |
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68 // reference a Python object which was created by converting a C++ |
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69 // argument for passing to PyEval_CallFunction, its reference |
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70 // count will be 2 until the end of the full expression containing |
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71 // the conversion, and that interferes with dangling |
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72 // pointer/reference detection. |
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73 converter::return_from_python<R> converter; |
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74 return converter(result); |
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75 } |
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76 |
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77 # undef N |
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78 |
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79 #endif |