pub fn is_a<T, I, Error: ParseError<I>>(
arr: 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>
Expand description
Returns the longest slice of the matches the pattern.
The parser will return the longest slice consisting of the characters in provided in the combinator’s argument.
It will return a Err(ErrMode::Backtrack((_, ErrorKind::IsA))) if the pattern wasn’t met.
Example
use winnow::bytes::complete::is_a;
fn hex(s: &str) -> IResult<&str, &str> {
is_a("1234567890ABCDEF")(s)
}
assert_eq!(hex("123 and voila"), Ok((" and voila", "123")));
assert_eq!(hex("DEADBEEF and others"), Ok((" and others", "DEADBEEF")));
assert_eq!(hex("BADBABEsomething"), Ok(("something", "BADBABE")));
assert_eq!(hex("D15EA5E"), Ok(("", "D15EA5E")));
assert_eq!(hex(""), Err(ErrMode::Backtrack(Error::new("", ErrorKind::IsA))));WARNING: Deprecated, replaced with winnow::bytes::take_while1