make struct sequences subclass tuple; kill lots of code
This fixes #8413.
diff --git a/Include/structseq.h b/Include/structseq.h
index 0b8d387..25763ce 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -26,17 +26,12 @@
PyAPI_FUNC(PyObject *) PyStructSequence_New(PyTypeObject* type);
-typedef struct {
- PyObject_VAR_HEAD
- PyObject *ob_item[1];
-} PyStructSequence;
+typedef PyTupleObject PyStructSequence;
/* Macro, *only* to be used to fill in brand new objects */
-#define PyStructSequence_SET_ITEM(op, i, v) \
- (((PyStructSequence *)(op))->ob_item[i] = v)
+#define PyStructSequence_SET_ITEM(op, i, v) PyTuple_SET_ITEM(op, i, v)
-#define PyStructSequence_GET_ITEM(op, i) \
- (((PyStructSequence *)(op))->ob_item[i])
+#define PyStructSequence_GET_ITEM(op, i) PyTuple_GET_ITEM(op, i)
#ifdef __cplusplus