Completing functionality for enum.auto (#1331)

mistermocha · JelleZijlstra · commit 2053e5882fcb · 2017-05-27T15:06:00.000-07:00
Full context: python/mypy#3441 Closes python/mypy#3434.
diff --git a/stdlib/3.4/enum.pyi b/stdlib/3.4/enum.pyi
@@ -32,7 +32,8 @@ def unique(enumeration: _S) -> _S: ...
 if sys.version_info >= (3, 6):
     _auto_null = ...  # type: Any
 
-    class auto:
+    # subclassing IntFlag so it picks up all implemented base functions, best modeling behavior of enum.auto()
+    class auto(IntFlag):
         value = ...  # type: Any
 
     class Flag(Enum):
