iterator.cpp

来自「C++的一个好库。。。现在很流行」· C++ 代码 · 共 40 行

// Copyright David Abrahams 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#include <boost/python/object/iterator_core.hpp>
#include <boost/python/object/function_object.hpp>
#include <boost/bind.hpp>
#include <boost/mpl/vector/vector10.hpp>

namespace boost { namespace python { namespace objects { 

namespace
{
  PyObject* identity(PyObject* args_, PyObject*)
  {
      PyObject* x = PyTuple_GET_ITEM(args_,0);
      Py_INCREF(x);
      return x;
  }
}

BOOST_PYTHON_DECL object const& identity_function()
{
    static object result(
        function_object(
            py_function(&identity, mpl::vector2<PyObject*,PyObject*>())
        )
    );
    return result;
}

void stop_iteration_error()
{
    PyErr_SetObject(PyExc_StopIteration, Py_None);
    throw_error_already_set();
}

}}} // namespace boost::python::objects