fn parse_is_where<'i, P, Impl>(
parser: &P,
input: &mut Parser<'i>,
state: SelectorParsingState,
component: impl FnOnce(SelectorList<Impl>) -> Component<Impl>,
) -> Result<Component<Impl>, ParseError<P::Error>>where
P: Parser<'i, Impl = Impl>,
Impl: SelectorImpl,