from typing import TypeVar, Any, Mapping, Iterator, NoReturn, Dict, Type
from typing import TYPE_CHECKING as TYPE_CHECKING
from typing import NewType as NewType

import sys

_T = TypeVar('_T')

class _SpecialForm:
    def __getitem__(self, typeargs: Any) -> Any:
        pass

Protocol: _SpecialForm = ...
def runtime_checkable(x: _T) -> _T: pass
runtime = runtime_checkable

Final: _SpecialForm = ...
def final(x: _T) -> _T: pass

Literal: _SpecialForm = ...

Annotated: _SpecialForm = ...


# Fallback type for all typed dicts (does not exist at runtime).
class _TypedDict(Mapping[str, object]):
    # Needed to make this class non-abstract. It is explicitly declared abstract in
    # typeshed, but we don't want to import abc here, as it would slow down the tests.
    def __iter__(self) -> Iterator[str]: ...
    def copy(self: _T) -> _T: ...
    # Using NoReturn so that only calls using the plugin hook can go through.
    def setdefault(self, k: NoReturn, default: object) -> object: ...
    # Mypy expects that 'default' has a type variable type.
    def pop(self, k: NoReturn, default: _T = ...) -> object: ...
    def update(self: _T, __m: _T) -> None: ...
    if sys.version_info < (3, 0):
        def has_key(self, k: str) -> bool: ...
    def __delitem__(self, k: NoReturn) -> None: ...

def TypedDict(typename: str, fields: Dict[str, Type[_T]], *, total: Any = ...) -> Type[dict]: ...
