from typing import TypeVar, Union from nonebot.adapters import Event from nonebot.matcher import Matcher from nonebot.params import LastReceived, Received async def matcher(m: Matcher) -> Matcher: return m async def postpone_matcher(m: "Matcher") -> Matcher: return m async def legacy_matcher(matcher): return matcher async def not_legacy_matcher(matcher: int): ... class FooMatcher(Matcher): ... async def sub_matcher(m: FooMatcher) -> FooMatcher: return m class BarMatcher(Matcher): ... async def union_matcher( m: Union[FooMatcher, BarMatcher], ) -> Union[FooMatcher, BarMatcher]: return m M = TypeVar("M", bound=Matcher) async def generic_matcher(m: M) -> M: return m CM = TypeVar("CM", Matcher, None) async def generic_matcher_none(m: CM) -> CM: return m async def not_matcher(m: Union[int, Matcher]): ... async def receive(e: Event = Received("test")) -> Event: return e async def last_receive(e: Event = LastReceived()) -> Event: return e