Function combinedfun::str_parsers::one_of

pub fn one_of<'a, I: 'a, E: 'a>(
    s: &'a str
) -> Parser<impl ParserImpl<I, Output = char, Error = E> + 'a, I> where
    E: ConsumeError<I>,
    I: SplitFirst<Element = char> + Clone, 

Consumes and returns one character that is in s.