Issue #14288: Serialization support for builtin iterators.
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index dde34ad..4af4a49 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -967,8 +967,39 @@
PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
+static PyObject *
+tupleiter_reduce(tupleiterobject *it)
+{
+ if (it->it_seq)
+ return Py_BuildValue("N(O)l", _PyIter_GetBuiltin("iter"),
+ it->it_seq, it->it_index);
+ else
+ return Py_BuildValue("N(())", _PyIter_GetBuiltin("iter"));
+}
+
+static PyObject *
+tupleiter_setstate(tupleiterobject *it, PyObject *state)
+{
+ long index = PyLong_AsLong(state);
+ if (index == -1 && PyErr_Occurred())
+ return NULL;
+ if (it->it_seq != NULL) {
+ if (index < 0)
+ index = 0;
+ else if (it->it_seq != NULL && index > PyTuple_GET_SIZE(it->it_seq))
+ index = PyTuple_GET_SIZE(it->it_seq);
+ it->it_index = index;
+ }
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(reduce_doc, "Return state information for pickling.");
+PyDoc_STRVAR(setstate_doc, "Set state information for unpickling.");
+
static PyMethodDef tupleiter_methods[] = {
{"__length_hint__", (PyCFunction)tupleiter_len, METH_NOARGS, length_hint_doc},
+ {"__reduce__", (PyCFunction)tupleiter_reduce, METH_NOARGS, reduce_doc},
+ {"__setstate__", (PyCFunction)tupleiter_setstate, METH_O, setstate_doc},
{NULL, NULL} /* sentinel */
};