use new union syntax in ctypes/__init__.pyi (#5883)

stdlib/ctypes/__init__.pyi

@@ -38,21 +38,16 @@ class CDLL(object):
     if sys.version_info >= (3, 8):
         def __init__(
             self,
-            name: Optional[str],
+            name: str | None,
             mode: int = ...,
-            handle: Optional[int] = ...,
+            handle: int | None = ...,
             use_errno: bool = ...,
             use_last_error: bool = ...,
-            winmode: Optional[int] = ...,
+            winmode: int | None = ...,
         ) -> None: ...
     else:
         def __init__(
-            self,
-            name: Optional[str],
-            mode: int = ...,
-            handle: Optional[int] = ...,
-            use_errno: bool = ...,
-            use_last_error: bool = ...,
+            self, name: str | None, mode: int = ..., handle: int | None = ..., use_errno: bool = ..., use_last_error: bool = ...
         ) -> None: ...
     def __getattr__(self, name: str) -> _NamedFuncPointer: ...
     def __getitem__(self, name: str) -> _NamedFuncPointer: ...
@@ -95,7 +90,7 @@ class _CDataMeta(type):
 class _CData(metaclass=_CDataMeta):
     _b_base: int = ...
     _b_needsfree_: bool = ...
-    _objects: Optional[Mapping[Any, int]] = ...
+    _objects: Mapping[Any, int] | None = ...
     @classmethod
     def from_buffer(cls: Type[_CT], source: _WritableBuffer, offset: int = ...) -> _CT: ...
     @classmethod
@@ -103,7 +98,7 @@ class _CData(metaclass=_CDataMeta):
     @classmethod
     def from_address(cls: Type[_CT], address: int) -> _CT: ...
     @classmethod
-    def from_param(cls: Type[_CT], obj: Any) -> _UnionT[_CT, _CArgObject]: ...
+    def from_param(cls: Type[_CT], obj: Any) -> _CT | _CArgObject: ...
     @classmethod
     def in_dll(cls: Type[_CT], library: CDLL, name: str) -> _CT: ...
 
@@ -114,7 +109,7 @@ _ECT = Callable[[Optional[Type[_CData]], _FuncPointer, Tuple[_CData, ...]], _CDa
 _PF = _UnionT[Tuple[int], Tuple[int, str], Tuple[int, str, Any]]
 
 class _FuncPointer(_PointerLike, _CData):
-    restype: _UnionT[Type[_CData], Callable[[int], Any], None] = ...
+    restype: Type[_CData] | Callable[[int], Any] | None = ...
     argtypes: Sequence[Type[_CData]] = ...
     errcheck: _ECT = ...
     @overload
@@ -122,7 +117,7 @@ class _FuncPointer(_PointerLike, _CData):
     @overload
     def __init__(self, callable: Callable[..., Any]) -> None: ...
     @overload
-    def __init__(self, func_spec: Tuple[_UnionT[str, int], CDLL], paramflags: Tuple[_PF, ...] = ...) -> None: ...
+    def __init__(self, func_spec: Tuple[str | int, CDLL], paramflags: Tuple[_PF, ...] = ...) -> None: ...
     @overload
     def __init__(self, vtlb_index: int, name: str, paramflags: Tuple[_PF, ...] = ..., iid: pointer[c_int] = ...) -> None: ...
     def __call__(self, *args: Any, **kwargs: Any) -> Any: ...
@@ -133,15 +128,15 @@ class _NamedFuncPointer(_FuncPointer):
 class ArgumentError(Exception): ...
 
 def CFUNCTYPE(
-    restype: Optional[Type[_CData]], *argtypes: Type[_CData], use_errno: bool = ..., use_last_error: bool = ...
+    restype: Type[_CData] | None, *argtypes: Type[_CData], use_errno: bool = ..., use_last_error: bool = ...
 ) -> Type[_FuncPointer]: ...
 
 if sys.platform == "win32":
     def WINFUNCTYPE(
-        restype: Optional[Type[_CData]], *argtypes: Type[_CData], use_errno: bool = ..., use_last_error: bool = ...
+        restype: Type[_CData] | None, *argtypes: Type[_CData], use_errno: bool = ..., use_last_error: bool = ...
     ) -> Type[_FuncPointer]: ...
 
-def PYFUNCTYPE(restype: Optional[Type[_CData]], *argtypes: Type[_CData]) -> Type[_FuncPointer]: ...
+def PYFUNCTYPE(restype: Type[_CData] | None, *argtypes: Type[_CData]) -> Type[_FuncPointer]: ...
 
 class _CArgObject: ...
 
@@ -155,17 +150,17 @@ _CVoidPLike = _UnionT[_PointerLike, Array[Any], _CArgObject, int]
 _CVoidConstPLike = _UnionT[_CVoidPLike, bytes]
 
 def addressof(obj: _CData) -> int: ...
-def alignment(obj_or_type: _UnionT[_CData, Type[_CData]]) -> int: ...
+def alignment(obj_or_type: _CData | Type[_CData]) -> int: ...
 def byref(obj: _CData, offset: int = ...) -> _CArgObject: ...
 
 _CastT = TypeVar("_CastT", bound=_CanCastTo)
 
-def cast(obj: _UnionT[_CData, _CArgObject, int], typ: Type[_CastT]) -> _CastT: ...
-def create_string_buffer(init: _UnionT[int, bytes], size: Optional[int] = ...) -> Array[c_char]: ...
+def cast(obj: _CData | _CArgObject | int, typ: Type[_CastT]) -> _CastT: ...
+def create_string_buffer(init: int | bytes, size: int | None = ...) -> Array[c_char]: ...
 
 c_buffer = create_string_buffer
 
-def create_unicode_buffer(init: _UnionT[int, str], size: Optional[int] = ...) -> Array[c_wchar]: ...
+def create_unicode_buffer(init: int | str, size: int | None = ...) -> Array[c_wchar]: ...
 
 if sys.platform == "win32":
     def DllCanUnloadNow() -> int: ...
@@ -204,11 +199,11 @@ def set_errno(value: int) -> int: ...
 if sys.platform == "win32":
     def set_last_error(value: int) -> int: ...
 
-def sizeof(obj_or_type: _UnionT[_CData, Type[_CData]]) -> int: ...
+def sizeof(obj_or_type: _CData | Type[_CData]) -> int: ...
 def string_at(address: _CVoidConstPLike, size: int = ...) -> bytes: ...
 
 if sys.platform == "win32":
-    def WinError(code: Optional[int] = ..., descr: Optional[str] = ...) -> OSError: ...
+    def WinError(code: int | None = ..., descr: str | None = ...) -> OSError: ...
 
 def wstring_at(address: _CVoidConstPLike, size: int = ...) -> str: ...
 
@@ -219,10 +214,10 @@ class _SimpleCData(Generic[_T], _CData):
 class c_byte(_SimpleCData[int]): ...
 
 class c_char(_SimpleCData[bytes]):
-    def __init__(self, value: _UnionT[int, bytes] = ...) -> None: ...
+    def __init__(self, value: int | bytes = ...) -> None: ...
 
 class c_char_p(_PointerLike, _SimpleCData[Optional[bytes]]):
-    def __init__(self, value: Optional[_UnionT[int, bytes]] = ...) -> None: ...
+    def __init__(self, value: int | bytes | None = ...) -> None: ...
 
 class c_double(_SimpleCData[float]): ...
 class c_longdouble(_SimpleCData[float]): ...
@@ -250,7 +245,7 @@ class c_void_p(_PointerLike, _SimpleCData[Optional[int]]): ...
 class c_wchar(_SimpleCData[str]): ...
 
 class c_wchar_p(_PointerLike, _SimpleCData[Optional[str]]):
-    def __init__(self, value: Optional[_UnionT[int, str]] = ...) -> None: ...
+    def __init__(self, value: int | str | None = ...) -> None: ...
 
 class c_bool(_SimpleCData[bool]):
     def __init__(self, value: bool = ...) -> None: ...
@@ -265,7 +260,7 @@ class _CField:
     size: int = ...
 
 class _StructUnionMeta(_CDataMeta):
-    _fields_: Sequence[_UnionT[Tuple[str, Type[_CData]], Tuple[str, Type[_CData], int]]] = ...
+    _fields_: Sequence[Tuple[str, Type[_CData]] | Tuple[str, Type[_CData], int]] = ...
     _pack_: int = ...
     _anonymous_: Sequence[str] = ...
     def __getattr__(self, name: str) -> _CField: ...