Function winnow::bytes::streaming::take_while

pub fn take_while<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_while0</code> with input wrapped in <code>winnow::Partial</code>

Returns the longest input slice (if any) 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).

Partial Specific

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

Example

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

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

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

WARNING: Deprecated, replaced with winnow::bytes::take_while0 with input wrapped in winnow::Partial