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gh-116946: fully implement GC protocol for _tokenize.TokenizerIter #138330

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gh-116946: fully implement GC protocol for _tokenize.TokenizerIter #138330

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17 changes: 15 additions & 2 deletions Python/Python-tokenize.c
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Original file line number Diff line number Diff line change
Expand Up @@ -351,17 +351,26 @@ tokenizeriter_next(PyObject *op)
static void
tokenizeriter_dealloc(PyObject *op)
{
PyTypeObject *tp = Py_TYPE(op);
PyObject_GC_UnTrack(op);
tokenizeriterobject *it = (tokenizeriterobject*)op;
PyTypeObject *tp = Py_TYPE(it);
Py_XDECREF(it->last_line);
_PyTokenizer_Free(it->tok);
tp->tp_free(it);
Py_DECREF(tp);
}

static int
tokenizeriter_traverse(PyObject *op, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(op));
return 0;
}

static PyType_Slot tokenizeriter_slots[] = {
{Py_tp_new, tokenizeriter_new},
{Py_tp_dealloc, tokenizeriter_dealloc},
{Py_tp_traverse, tokenizeriter_traverse},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_iter, PyObject_SelfIter},
{Py_tp_iternext, tokenizeriter_next},
Expand All @@ -371,7 +380,11 @@ static PyType_Slot tokenizeriter_slots[] = {
static PyType_Spec tokenizeriter_spec = {
.name = "_tokenize.TokenizerIter",
.basicsize = sizeof(tokenizeriterobject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE),
.flags = (
Py_TPFLAGS_DEFAULT
| Py_TPFLAGS_IMMUTABLETYPE
| Py_TPFLAGS_HAVE_GC
),
.slots = tokenizeriter_slots,
};

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