bpo-40792: Make the result of PyNumber_Index() always having exact type int. (GH-20443)
Previously, the result could have been an instance of a subclass of int.
Also revert bpo-26202 and make attributes start, stop and step of the range
object having exact type int.
Add private function _PyNumber_Index() which preserves the old behavior
of PyNumber_Index() for performance to use it in the conversion functions
like PyLong_AsLong().
diff --git a/Include/cpython/abstract.h b/Include/cpython/abstract.h
index 7bc8083..aa72f99 100644
--- a/Include/cpython/abstract.h
+++ b/Include/cpython/abstract.h
@@ -379,6 +379,9 @@
/* Convert Python int to Py_ssize_t. Do nothing if the argument is None. */
PyAPI_FUNC(int) _Py_convert_optional_to_ssize_t(PyObject *, void *);
+/* Same as PyNumber_Index but can return an instance of a subclass of int. */
+PyAPI_FUNC(PyObject *) _PyNumber_Index(PyObject *o);
+
#ifdef __cplusplus
}
#endif