PEP 702: decorator is in warnings, not typing-extensions (#16488)

Followup from
https://github.com/python/mypy/pull/16457/files#r1392715784

Author: JelleZijlstra

mypy/test/teststubtest.py

@@ -72,7 +72,6 @@ class Tuple(Sequence[_T_co]): ...
 class NamedTuple(tuple[Any, ...]): ...
 def overload(func: _T) -> _T: ...
 def type_check_only(func: _T) -> _T: ...
-def deprecated(__msg: str) -> Callable[[_T], _T]: ...
 def final(func: _T) -> _T: ...
 """
 
@@ -635,7 +634,8 @@ def f5(__b: str) -> str: ...
         )
         yield Case(
             stub="""
-            from typing import deprecated, final
+            from typing import final
+            from typing_extensions import deprecated
             class Foo:
                 @overload
                 @final

mypy/types.py

@@ -123,7 +123,7 @@
 ANNOTATED_TYPE_NAMES: Final = ("typing.Annotated", "typing_extensions.Annotated")
 
 # Supported @deprecated type names
-DEPRECATED_TYPE_NAMES: Final = ("typing.deprecated", "typing_extensions.deprecated")
+DEPRECATED_TYPE_NAMES: Final = ("warnings.deprecated", "typing_extensions.deprecated")
 
 # We use this constant in various places when checking `tuple` subtyping:
 TUPLE_LIKE_INSTANCE_NAMES: Final = (

test-data/unit/lib-stub/typing_extensions.pyi

@@ -1,5 +1,5 @@
 import typing
-from typing import Any, Mapping, Iterable, Iterator, NoReturn as NoReturn, Dict, Tuple, Type
+from typing import Any, Callable, Mapping, Iterable, Iterator, NoReturn as NoReturn, Dict, Tuple, Type
 from typing import TYPE_CHECKING as TYPE_CHECKING
 from typing import NewType as NewType, overload as overload
 
@@ -75,5 +75,6 @@ def dataclass_transform(
 ) -> Callable[[T], T]: ...
 
 def override(__arg: _T) -> _T: ...
+def deprecated(__msg: str) -> Callable[[_T], _T]: ...
 
 _FutureFeatureFixture = 0