fix false positive for typeddicts

CHANGELOG.rst

@@ -1,6 +1,11 @@
 Changelog
 =========
 
+0.16.1 (2022-11-21)
+-------------------
+
+- Don't flag ``TypedDict`` subclasses as missing slots (#120).
+
 0.16.0 (2022-11-01)
 -------------------
 

docs/advanced.rst

@@ -18,7 +18,7 @@ Use the following configuration:
 
    repos:
    - repo: https://github.com/ariebovenberg/slotscheck
-     rev: v0.16.0
+     rev: v0.16.1
      hooks:
      - id: slotscheck
        # If your Python files are not importable from the project root,

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "slotscheck"
-version = "0.16.0"
+version = "0.16.1"
 description = "Ensure your __slots__ are working properly."
 authors = ["Arie Bovenberg <a.c.bovenberg@gmail.com>"]
 license = "MIT"

src/slotscheck/checks.py

@@ -1,7 +1,7 @@
 "Slots-related checks and inspection tools"
 import platform
 import sys
-from typing import Collection, Iterator, Optional
+from typing import Collection, Iterator, Optional, is_typeddict
 
 
 def slots(c: type) -> Optional[Collection[str]]:
@@ -18,8 +18,10 @@ def slots(c: type) -> Optional[Collection[str]]:
 
 
 def has_slots(c: type) -> bool:
-    return "__slots__" in c.__dict__ or not (
-        issubclass(c, BaseException) or is_pure_python(c)
+    return (
+        "__slots__" in c.__dict__
+        or not (issubclass(c, BaseException) or is_pure_python(c))
+        or is_typeddict(c)
     )
 
 

tests/src/test_checks.py

@@ -4,6 +4,7 @@
 from enum import Enum
 from fractions import Fraction
 from random import Random
+from typing import TypedDict
 from xml.etree.ElementTree import Element
 
 import pytest
@@ -64,6 +65,10 @@ class Foo(metaclass=FooMeta):
     __slots__ = ()
 
 
+class MyDict(TypedDict):
+    foo: str
+
+
 class TestHasSlots:
     @pytest.mark.parametrize(
         "klass",
@@ -72,6 +77,9 @@ class TestHasSlots:
     def test_not_purepython(self, klass):
         assert has_slots(klass)
 
+    def test_typeddict(self):
+        assert has_slots(MyDict)
+
     @pytest.mark.parametrize(
         "klass",
         [