Function npyiter_copy

numpy/core/src/multiarray/nditer_pywrap.c:1230–1264

* Makes a copy of the iterator. Note that the nesting is not * copied. */

 * copied.
 */
static PyObject *
npyiter_copy(NewNpyArrayIterObject *self, PyObject *NPY_UNUSED(args))
{
    NewNpyArrayIterObject *iter;

    if (self->iter == NULL) {
        PyErr_SetString(PyExc_ValueError,
                "Iterator is invalid");
        return NULL;
    }

    /* Allocate the iterator */
    iter = (NewNpyArrayIterObject *)npyiter_new(&NpyIter_Type, NULL, NULL);
    if (iter == NULL) {
        return NULL;
    }

    /* Copy the C iterator */
    iter->iter = NpyIter_Copy(self->iter);
    if (iter->iter == NULL) {
        Py_DECREF(iter);
        return NULL;
    }

    /* Cache some values for the member functions to use */
    if (npyiter_cache_values(iter) < 0) {
        Py_DECREF(iter);
        return NULL;
    }

    iter->started = self->started;
    iter->finished = self->finished;

    return (PyObject *)iter;
}

static PyObject *
npyiter_iternext(NewNpyArrayIterObject *self, PyObject *NPY_UNUSED(args))