Function winnow::ascii::alpha0

pub fn alpha0<Input, Error>(
    input: &mut Input,
) -> PResult<<Input as Stream>::Slice, Error>
where
    Input: StreamIsPartial + Stream,
    <Input as Stream>::Token: AsChar,
    Error: ParserError<Input>,

Recognizes zero or more lowercase and uppercase ASCII alphabetic characters: 'a'..='z', 'A'..='Z'

Complete version: Will return the whole input if no terminating token is found (a non alphabetic 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 alphabetic character).

Effective Signature

Assuming you are parsing a &str Stream:

pub fn alpha0<'i>(input: &mut &'i str) -> PResult<&'i str>

Example

fn parser<'s>(input: &mut &'s str) -> PResult<&'s str, InputError<&'s str>> {
    alpha0.parse_next(input)
}

assert_eq!(parser.parse_peek("ab1c"), Ok(("1c", "ab")));
assert_eq!(parser.parse_peek("1c"), Ok(("1c", "")));
assert_eq!(parser.parse_peek(""), Ok(("", "")));

assert_eq!(alpha0::<_, InputError<_>>.parse_peek(Partial::new("ab1c")), Ok((Partial::new("1c"), "ab")));
assert_eq!(alpha0::<_, InputError<_>>.parse_peek(Partial::new("1c")), Ok((Partial::new("1c"), "")));
assert_eq!(alpha0::<_, InputError<_>>.parse_peek(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(1))));