Function winnow::bytes::streaming::take_while1

pub fn take_while1<T, I, Error: ParseError<I>>(
    list: T
) -> impl Fn(I) -> IResult<I, <I as Stream>::Slice, Error>where
    I: Stream,
    T: ContainsToken<<I as Stream>::Token>,

👎Deprecated since 0.1.0: Replaced with <code>winnow::bytes::take_while1</code> with input wrapped in <code>winnow::Partial</code>

Returns the longest (at least 1) input slice that matches the predicate.

The parser will return the longest slice that matches the given predicate (a function that takes the input and returns a bool).

It will return an Err(ErrMode::Backtrack((_, ErrorKind::TakeWhile1))) if the pattern wasn’t met.

Partial Specific

Partial version will return a ErrMode::Incomplete(Needed::new(1)) or if the pattern reaches the end of the input.

Example

use winnow::bytes::streaming::take_while1;
use winnow::stream::AsChar;

fn alpha(s: &[u8]) -> IResult<&[u8], &[u8]> {
  take_while1(AsChar::is_alpha)(s)
}

assert_eq!(alpha(b"latin123"), Ok((&b"123"[..], &b"latin"[..])));
assert_eq!(alpha(b"latin"), Err(ErrMode::Incomplete(Needed::new(1))));
assert_eq!(alpha(b"12345"), Err(ErrMode::Backtrack(Error::new(&b"12345"[..], ErrorKind::TakeWhile1))));

WARNING: Deprecated, replaced with winnow::bytes::take_while1 with input wrapped in winnow::Partial