Function abnf_core::complete::alpha

pub fn alpha<I, E>(input: I) -> IResult<I, char, E>where
    I: InputIter + Slice<RangeFrom<usize>>,
    <I as InputIter>::Item: AsChar,
    E: ParseError<I>,

ALPHA = %x41-5A / %x61-7A ; A-Z / a-z