# Function nom::bytes::complete::take_till

source · [−]

    pub fn take_till<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 input slice (if any) 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).

## Example

    use nom::bytes::complete::take_till;

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

    assert_eq!(till_colon("latin:123"), Ok((":123", "latin")));
    assert_eq!(till_colon(":empty matched"), Ok((":empty matched", ""))); //allowed
    assert_eq!(till_colon("12345"), Ok(("", "12345")));
    assert_eq!(till_colon(""), Ok(("", "")));