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Note the buffer slots can be set with PyType_Spec with the unlimited API. (GH-22031) 

Follow up to f7c4e23642.
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Benjamin Peterson 2020-09-01 20:36:42 -05:00 committed by GitHub
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Doc/c-api/type.rst
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@ -225,7 +225,8 @@ The following functions and structs are used to create
* ``Py_nb_add`` to set :c:member:`PyNumberMethods.nb_add`
* ``Py_sq_length`` to set :c:member:`PySequenceMethods.sq_length`
The following fields cannot be set using :c:type:`PyType_Spec` and :c:type:`PyType_Slot`:
The following fields cannot be set at all using :c:type:`PyType_Spec` and
:c:type:`PyType_Slot`:
* :c:member:`~PyTypeObject.tp_dict`
* :c:member:`~PyTypeObject.tp_mro`
@ -239,6 +240,10 @@ The following functions and structs are used to create
(see :ref:`PyMemberDef <pymemberdef-offsets>`)
* :c:member:`~PyTypeObject.tp_vectorcall_offset`
(see :ref:`PyMemberDef <pymemberdef-offsets>`)
The following fields cannot be set using :c:type:`PyType_Spec` and
:c:type:`PyType_Slot` under the limited API:
* :c:member:`~PyBufferProcs.bf_getbuffer`
* :c:member:`~PyBufferProcs.bf_releasebuffer`
@ -246,6 +251,10 @@ The following functions and structs are used to create
To avoid issues, use the *bases* argument of
:py:func:`PyType_FromSpecWithBases` instead.
.. versionchanged:: 3.9
Slots in :c:type:`PyBufferProcs` in may be set in the unlimited API.
.. c:member:: void *PyType_Slot.pfunc
The desired value of the slot. In most cases, this is a pointer