Added __slots__ to AsyncResource (#733)

agronholm · May 12, 2024 · dfc44cf · dfc44cf
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diff --git a/docs/versionhistory.rst b/docs/versionhistory.rst
@@ -28,6 +28,8 @@ This library adheres to `Semantic Versioning 2.0 <http://semver.org/>`_.
 - Emit a ``ResourceWarning`` for ``MemoryObjectReceiveStream`` and
   ``MemoryObjectSendStream`` that were garbage collected without being closed (PR by
   Andrey Kazantcev)
+- Added ``__slots__`` to ``AsyncResource`` so that child classes can use ``__slots__``
+  (`#733 <https://github.com/agronholm/anyio/pull/733>`_; PR by Justin Su)
 
 **4.3.0**
 

diff --git a/src/anyio/abc/_resources.py b/src/anyio/abc/_resources.py
@@ -15,6 +15,8 @@ class AsyncResource(metaclass=ABCMeta):
     and calls :meth:`aclose` on exit.
     """
 
+    __slots__ = ()
+
     async def __aenter__(self: T) -> T:
         return self