Function cssparser::rules_and_declarations::parse_at_rule

fn parse_at_rule<'i, 't, P, E>(
    start: &ParserState,
    name: CowRcStr<'i>,
    input: &mut Parser<'i, 't>,
    parser: &mut P
) -> Result<<P as AtRuleParser<'i>>::AtRule, (ParseError<'i, E>, &'i str)>where
    P: AtRuleParser<'i, Error = E>,