[−][src]Function gchemol_parser::parsers::digit0
pub fn digit0<T, E>(input: T) -> Result<(T, T), Err<E>> where
E: ParseError<T>,
T: InputTakeAtPosition,
<T as InputTakeAtPosition>::Item: AsChar,
Recognizes zero or more ASCII numerical characters: 0-9
complete version: Will return an error if there's not enough input data, or the whole input if no terminating token is found (a non digit character).
Example
fn parser(input: &str) -> IResult<&str, &str> { digit0(input) } assert_eq!(parser("21c"), Ok(("c", "21"))); assert_eq!(parser("21"), Ok(("", "21"))); assert_eq!(parser("a21c"), Ok(("a21c", ""))); assert_eq!(parser(""), Ok(("", "")));