Add tp_static_builtin_index to the docs.

Author: ericsnowcurrently

Doc/c-api/type.rst

@@ -325,6 +325,7 @@ The following functions and structs are used to create
       * :c:member:`~PyTypeObject.tp_cache`
       * :c:member:`~PyTypeObject.tp_subclasses`
       * :c:member:`~PyTypeObject.tp_weaklist`
+      * :c:member:`~PyTypeObject.tp_tp_static_builtin_index`
       * :c:member:`~PyTypeObject.tp_vectorcall`
       * :c:member:`~PyTypeObject.tp_weaklistoffset`
         (see :ref:`PyMemberDef <pymemberdef-offsets>`)

Doc/c-api/typeobj.rst

@@ -147,6 +147,8 @@ Quick Reference
    +------------------------------------------------+-----------------------------------+-------------------+---+---+---+---+
    | :c:member:`~PyTypeObject.tp_vectorcall`        | :c:type:`vectorcallfunc`          |                   |   |   |   |   |
    +------------------------------------------------+-----------------------------------+-------------------+---+---+---+---+
+   | [:c:member:`~PyTypeObject.tp_static_builtin_index`] | size_t                          |                   |   |   |       |
+   +------------------------------------------------+-----------------------------------+-------------------+---+---+---+---+
 
 .. [#slots]
    A slot name in parentheses indicates it is (effectively) deprecated.
@@ -2028,6 +2030,17 @@ and :c:type:`PyType_Type` effectively act as defaults.)
 
    .. versionadded:: 3.9 (the field exists since 3.8 but it's only used since 3.9)
 
+.. c:member:: PyObject* PyTypeObject.tp_static_builtin_index
+
+   A static builtin type's index into the per-interpreter array of type state.
+   Internal use only.
+
+   **Inheritance:**
+
+   This field is not inherited.
+
+   .. versionadded:: 3.12
+
 
 .. _static-types:
 

Doc/includes/typestruct.h

@@ -80,4 +80,6 @@ typedef struct _typeobject {
 
     destructor tp_finalize;
     vectorcallfunc tp_vectorcall;
+
+    size_t tp_static_builtin_index;
 } PyTypeObject;