Document PyType_SUPPORTS_WEAKREFS()

Author: ZeroIntensity

Doc/c-api/type.rst

@@ -327,6 +327,14 @@ Type Objects
 
    .. versionadded:: 3.12
 
+.. c:function:: int PyType_SUPPORTS_WEAKREFS(PyTypeObject *type)
+
+   Return true if instances of *type* supports creating weak references, false
+   otherwise. This function always succeeds. *type* must not be ``NULL``.
+
+   .. seealso::
+      * :ref:`weakrefobjects`
+      * :py:mod:`weakref`
 
 Creating Heap-Allocated Types
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