Function nom8::bytes::streaming::is_a

pub fn is_a<T, Input, Error: ParseError<Input>>(
    arr: T
) -> impl Fn(Input) -> IResult<Input, <Input as IntoOutput>::Output, Error>where
    Input: InputTakeAtPosition + IntoOutput,
    T: FindToken<<Input as InputTakeAtPosition>::Item>,

👎Deprecated since 8.0.0: Replaced with nom8::bytes::take_while1 with input wrapped in nom8::input::Streaming

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.

Streaming specific

Streaming version will return a Err::Incomplete(Needed::new(1)) if the pattern wasn’t met or if the pattern reaches the end of the input.

Example

use nom8::bytes::streaming::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"), Err(Err::Incomplete(Needed::new(1))));
assert_eq!(hex(""), Err(Err::Incomplete(Needed::new(1))));

WARNING: Deprecated, replaced with nom8::bytes::take_while1 with input wrapped in nom8::input::Streaming