python::detail::initialize_wrapper(self, &this->m_held);
    }

# undef N

// --------------- value_holder_back_reference ---------------

#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 2
# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
        && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
#  line BOOST_PP_LINE(__LINE__, value_holder.hpp(value_holder_back_reference))
# endif

# define N BOOST_PP_ITERATION()

# if (N != 0)
    template <BOOST_PP_ENUM_PARAMS_Z(1, N, class A)>
# endif
    value_holder_back_reference(
        PyObject* p BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a))
        : m_held(
            p BOOST_PP_COMMA_IF(N)
            BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil)
            )
    {
    }

# undef N

#endif
예제 #2
0
template <
    class R
    BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class A)
    >
typename detail::returnable<R>::type
call_method(PyObject* self, char const* name
    BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, const& a)
    , geofeatures_boost::type<R>* = 0
    )
{
    PyObject* const result = 
        PyEval_CallMethod(
            self
            , const_cast<char*>(name)
            , const_cast<char*>("(" BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FIXED, "O") ")")
            BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_FAST_ARG_TO_PYTHON_GET, nil)
            );
    
    // This conversion *must not* be done in the same expression as
    // the call, because, in the special case where the result is a
    // reference a Python object which was created by converting a C++
    // argument for passing to PyEval_CallFunction, its reference
    // count will be 2 until the end of the full expression containing
    // the conversion, and that interferes with dangling
    // pointer/reference detection.
    converter::return_from_python<R> converter;
    return converter(result);
}

# undef N