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gh-95245: Document Py_TPFLAGS_PREHEADER #135861

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gh-95245: Document Py_TPFLAGS_PREHEADER #135861

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0eb59b3
Add comemnt for Py_TPFLAGS_PREHEADER
sergey-miryanov Jun 23, 2025
3195c33
Add Py_TPFLAGS_PREHEADER to typeobj.rst
sergey-miryanov Jun 24, 2025
6b37dcf
Add news
sergey-miryanov Jun 24, 2025
fc7fb85
Fix news entry
sergey-miryanov Jun 24, 2025
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9 changes: 9 additions & 0 deletions Doc/c-api/typeobj.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1287,6 +1287,15 @@ and :c:data:`PyType_Type` effectively act as defaults.)
:c:member:`~PyTypeObject.tp_weaklistoffset` field is set in a superclass.


.. c:macro:: Py_TPFLAGS_PREHEADER

This is a shorthand for checking is :c:macro:`Py_TPFLAGS_MANAGED_DICT` or
:c:macro:`Py_TPFLAGS_MANAGED_WEAKREF` present. Supposed only for internal
usage.

.. versionadded:: 3.12


.. c:macro:: Py_TPFLAGS_ITEMS_AT_END

Only usable with variable-size types, i.e. ones with non-zero
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3 changes: 3 additions & 0 deletions Include/object.h
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Expand Up @@ -534,6 +534,9 @@ given type object has a specified feature.
*/
#define Py_TPFLAGS_MANAGED_DICT (1 << 4)

/* Type has dictionary or weakref pointers that are managed by VM and has
* to allocate space to store these.
*/
#define Py_TPFLAGS_PREHEADER (Py_TPFLAGS_MANAGED_WEAKREF | Py_TPFLAGS_MANAGED_DICT)

/* Set if instances of the type object are treated as sequences for pattern matching */
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core_and_Builtins/2025-06-24-13-08-15.gh-issue-95245.3whjTE.rst
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We don't need news entries for documentation changes, I'll put skip news on this.

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Thanks! I will remove news entry as we got consensus.

Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Add documnetation for :c:macro:`Py_TPFLAGS_PREHEADER`
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