Function winnow::ascii::hex_digit0
source · pub fn hex_digit0<Input, Error>(
input: &mut Input
) -> PResult<<Input as Stream>::Slice, Error>
Expand description
Recognizes zero or more ASCII hexadecimal numerical characters: '0'..='9'
, 'A'..='F'
,
'a'..='f'
Complete version: Will return the whole input if no terminating token is found (a non hexadecimal 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 hexadecimal digit character).
§Effective Signature
Assuming you are parsing a &str
Stream:
pub fn hex_digit0<'i>(input: &mut &'i str) -> PResult<&'i str>
§Example
fn parser<'s>(input: &mut &'s str) -> PResult<&'s str, InputError<&'s str>> {
hex_digit0.parse_next(input)
}
assert_eq!(parser.parse_peek("21cZ"), Ok(("Z", "21c")));
assert_eq!(parser.parse_peek("Z21c"), Ok(("Z21c", "")));
assert_eq!(parser.parse_peek(""), Ok(("", "")));
assert_eq!(hex_digit0::<_, InputError<_>>.parse_peek(Partial::new("21cZ")), Ok((Partial::new("Z"), "21c")));
assert_eq!(hex_digit0::<_, InputError<_>>.parse_peek(Partial::new("Z21c")), Ok((Partial::new("Z21c"), "")));
assert_eq!(hex_digit0::<_, InputError<_>>.parse_peek(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(1))));