# Function nom::bytes::streaming::take_till1

source · [−]

    pub fn take_till1<F, Input, Error: ParseError<Input>>(
        cond: F
    ) -> impl Fn(Input) -> IResult<Input, Input, Error> where
        Input: InputTakeAtPosition,
        F: Fn(<Input as InputTakeAtPosition>::Item) -> bool,

Expand description

Returns the longest (at least 1) input slice till a predicate is met.

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

## Streaming Specific

Streaming version will return a `Err::Incomplete(Needed::new(1))` if the match reaches the end of input or if there was not match.

## Example

    use nom::bytes::streaming::take_till1;

    fn till_colon(s: &str) -> IResult<&str, &str> {
      take_till1(|c| c == ':')(s)
    }

    assert_eq!(till_colon("latin:123"), Ok((":123", "latin")));
    assert_eq!(till_colon(":empty matched"), Err(Err::Error(Error::new(":empty matched", ErrorKind::TakeTill1))));
    assert_eq!(till_colon("12345"), Err(Err::Incomplete(Needed::new(1))));
    assert_eq!(till_colon(""), Err(Err::Incomplete(Needed::new(1))));