import sys
import typing
from typing import Annotated, Literal, TypeAlias, TypeVar

import typing_extensions

def f(x: "int"): ...  # Y020 Quoted annotations should never be used in stubs
def g(x: list["int"]): ...  # Y020 Quoted annotations should never be used in stubs
_T = TypeVar("_T", bound="int")  # Y020 Quoted annotations should never be used in stubs

def h(w: Literal["a", "b"], x: typing.Literal["c"], y: typing_extensions.Literal["d"], z: _T) -> _T: ...

def j() -> "int": ...  # Y020 Quoted annotations should never be used in stubs
Alias: TypeAlias = list["int"]  # Y020 Quoted annotations should never be used in stubs

class Child(list["int"]):  # Y020 Quoted annotations should never be used in stubs
    """Documented and guaranteed useful."""  # Y021 Docstrings should not be included in stubs

if sys.platform == "linux":
    f: "int"  # Y020 Quoted annotations should never be used in stubs
elif sys.platform == "win32":
    f: "str"  # Y020 Quoted annotations should never be used in stubs
else:
    f: "bytes"  # Y020 Quoted annotations should never be used in stubs

# These two shouldn't trigger Y020 -- empty strings can't be "quoted annotations"
k = ""  # Y052 Need type annotation for "k"
el = r""  # Y052 Need type annotation for "el"