# Function nom::bytes::streaming::take_until1

source · [−]

    pub fn take_until1<T, Input, Error: ParseError<Input>>(
        tag: T
    ) -> impl Fn(Input) -> IResult<Input, Input, Error> where
        Input: InputTake + InputLength + FindSubstring<T>,
        T: Clone,

Expand description

Returns the non empty input slice up to the first occurrence of the pattern.

It doesn’t consume the pattern.

## Streaming Specific

Streaming version will return a `Err::Incomplete(Needed::new(N))` if the input doesn’t contain the pattern or if the input is smaller than the pattern.

## Example

    use nom::bytes::streaming::take_until1;

    fn until_eof(s: &str) -> IResult<&str, &str> {
      take_until1("eof")(s)
    }

    assert_eq!(until_eof("hello, worldeof"), Ok(("eof", "hello, world")));
    assert_eq!(until_eof("hello, world"), Err(Err::Incomplete(Needed::Unknown)));
    assert_eq!(until_eof("hello, worldeo"), Err(Err::Incomplete(Needed::Unknown)));
    assert_eq!(until_eof("1eof2eof"), Ok(("eof2eof", "1")));
    assert_eq!(until_eof("eof"),  Err(Err::Error(Error::new("eof", ErrorKind::TakeUntil))));