pub fn digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> where
T: InputTakeAtPosition,
<T as InputTakeAtPosition>::Item: AsChar, Expand description
Recognizes one or more ASCII numerical characters: 0-9
Streaming version: Will return Err(nom::Err::Incomplete(_)) if there’s not enough input data,
or if no terminating token is found (a non digit character).
Example
assert_eq!(digit1::<_, (_, ErrorKind)>("21c"), Ok(("c", "21")));
assert_eq!(digit1::<_, (_, ErrorKind)>("c1"), Err(Err::Error(("c1", ErrorKind::Digit))));
assert_eq!(digit1::<_, (_, ErrorKind)>(""), Err(Err::Incomplete(Needed::new(1))));