Function nom::character::streaming::digit1

pub fn digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> where
    T: InputTakeAtPosition,
    <T as InputTakeAtPosition>::Item: AsChar, 

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::Size(1))));