Avoid unnecessary forward refs in class definitions (#10124)

stdlib/enum.pyi

@@ -208,13 +208,6 @@ def unique(enumeration: _EnumerationT) -> _EnumerationT: ...
 
 _auto_null: Any
 
-# subclassing IntFlag so it picks up all implemented base functions, best modeling behavior of enum.auto()
-class auto(IntFlag):
-    _value_: Any
-    @_magic_enum_attr
-    def value(self) -> Any: ...
-    def __new__(cls) -> Self: ...
-
 class Flag(Enum):
     _name_: str | None  # type: ignore[assignment]
     _value_: int
@@ -235,27 +228,6 @@ class Flag(Enum):
         __rand__ = __and__
         __rxor__ = __xor__
 
-if sys.version_info >= (3, 11):
-    # The body of the class is the same, but the base classes are different.
-    class IntFlag(int, ReprEnum, Flag, boundary=KEEP):  # type: ignore[misc]  # complaints about incompatible bases
-        def __new__(cls, value: int) -> Self: ...
-        def __or__(self, other: int) -> Self: ...
-        def __and__(self, other: int) -> Self: ...
-        def __xor__(self, other: int) -> Self: ...
-        __ror__ = __or__
-        __rand__ = __and__
-        __rxor__ = __xor__
-
-else:
-    class IntFlag(int, Flag):  # type: ignore[misc]  # complaints about incompatible bases
-        def __new__(cls, value: int) -> Self: ...
-        def __or__(self, other: int) -> Self: ...
-        def __and__(self, other: int) -> Self: ...
-        def __xor__(self, other: int) -> Self: ...
-        __ror__ = __or__
-        __rand__ = __and__
-        __rxor__ = __xor__
-
 if sys.version_info >= (3, 11):
     class StrEnum(str, ReprEnum):
         def __new__(cls, value: str) -> Self: ...
@@ -289,3 +261,31 @@ if sys.version_info >= (3, 11):
     def global_enum(cls: _EnumerationT, update_str: bool = False) -> _EnumerationT: ...
     def global_enum_repr(self: Enum) -> str: ...
     def global_flag_repr(self: Flag) -> str: ...
+
+if sys.version_info >= (3, 11):
+    # The body of the class is the same, but the base classes are different.
+    class IntFlag(int, ReprEnum, Flag, boundary=KEEP):  # type: ignore[misc]  # complaints about incompatible bases
+        def __new__(cls, value: int) -> Self: ...
+        def __or__(self, other: int) -> Self: ...
+        def __and__(self, other: int) -> Self: ...
+        def __xor__(self, other: int) -> Self: ...
+        __ror__ = __or__
+        __rand__ = __and__
+        __rxor__ = __xor__
+
+else:
+    class IntFlag(int, Flag):  # type: ignore[misc]  # complaints about incompatible bases
+        def __new__(cls, value: int) -> Self: ...
+        def __or__(self, other: int) -> Self: ...
+        def __and__(self, other: int) -> Self: ...
+        def __xor__(self, other: int) -> Self: ...
+        __ror__ = __or__
+        __rand__ = __and__
+        __rxor__ = __xor__
+
+# subclassing IntFlag so it picks up all implemented base functions, best modeling behavior of enum.auto()
+class auto(IntFlag):
+    _value_: Any
+    @_magic_enum_attr
+    def value(self) -> Any: ...
+    def __new__(cls) -> Self: ...

stdlib/multiprocessing/synchronize.pyi

@@ -14,9 +14,6 @@ class Barrier(threading.Barrier):
         self, parties: int, action: Callable[[], object] | None = None, timeout: float | None = None, *ctx: BaseContext
     ) -> None: ...
 
-class BoundedSemaphore(Semaphore):
-    def __init__(self, value: int = 1, *, ctx: BaseContext) -> None: ...
-
 class Condition(AbstractContextManager[bool]):
     def __init__(self, lock: _LockLike | None = None, *, ctx: BaseContext) -> None: ...
     def notify(self, n: int = 1) -> None: ...
@@ -36,6 +33,14 @@ class Event:
     def clear(self) -> None: ...
     def wait(self, timeout: float | None = None) -> bool: ...
 
+# Not part of public API
+class SemLock(AbstractContextManager[bool]):
+    def acquire(self, block: bool = ..., timeout: float | None = ...) -> bool: ...
+    def release(self) -> None: ...
+    def __exit__(
+        self, __exc_type: type[BaseException] | None, __exc_val: BaseException | None, __exc_tb: TracebackType | None
+    ) -> None: ...
+
 class Lock(SemLock):
     def __init__(self, *, ctx: BaseContext) -> None: ...
 
@@ -45,10 +50,5 @@ class RLock(SemLock):
 class Semaphore(SemLock):
     def __init__(self, value: int = 1, *, ctx: BaseContext) -> None: ...
 
-# Not part of public API
-class SemLock(AbstractContextManager[bool]):
-    def acquire(self, block: bool = ..., timeout: float | None = ...) -> bool: ...
-    def release(self) -> None: ...
-    def __exit__(
-        self, __exc_type: type[BaseException] | None, __exc_val: BaseException | None, __exc_tb: TracebackType | None
-    ) -> None: ...
+class BoundedSemaphore(Semaphore):
+    def __init__(self, value: int = 1, *, ctx: BaseContext) -> None: ...

stdlib/sqlite3/dbapi2.pyi

@@ -390,14 +390,13 @@ class Cursor(Iterator[Any]):
     def __iter__(self) -> Self: ...
     def __next__(self) -> Any: ...
 
-class DataError(DatabaseError): ...
-class DatabaseError(Error): ...
-
 class Error(Exception):
     if sys.version_info >= (3, 11):
         sqlite_errorcode: int
         sqlite_errorname: str
 
+class DatabaseError(Error): ...
+class DataError(DatabaseError): ...
 class IntegrityError(DatabaseError): ...
 class InterfaceError(Error): ...
 class InternalError(DatabaseError): ...