pub fn digit0<Input, Error>(
input: &mut Input
) -> PResult<<Input as Stream>::Slice, Error>
Expand description
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).
[Partial version][crate::_topic::partial]: Will return Err(winnow::error::ErrMode::Incomplete(_))
if there’s not enough input data,
or if no terminating token is found (a non digit character).
Effective Signature
Assuming you are parsing a &str
Stream:
pub fn digit0<'i>(input: &mut &'i str) -> PResult<&'i str>
Example
fn parser<'s>(input: &mut &'s str) -> PResult<&'s str, InputError<&'s str>> {
digit0.parse_next(input)
}
assert_eq!(parser.parse_peek("21c"), Ok(("c", "21")));
assert_eq!(parser.parse_peek("21"), Ok(("", "21")));
assert_eq!(parser.parse_peek("a21c"), Ok(("a21c", "")));
assert_eq!(parser.parse_peek(""), Ok(("", "")));
assert_eq!(digit0::<_, InputError<_>>.parse_peek(Partial::new("21c")), Ok((Partial::new("c"), "21")));
assert_eq!(digit0::<_, InputError<_>>.parse_peek(Partial::new("a21c")), Ok((Partial::new("a21c"), "")));
assert_eq!(digit0::<_, InputError<_>>.parse_peek(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(1))));