Function `take_till`

fn take_till<F, I, Error: ParseError<I>>(cond: F) -> impl FnMut(I) -> crate::internal::IResult<I, I, Error>
where
    I: Input,
    F: Fn(<I as Input>::Item) -> bool

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).

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::{Err, error::ErrorKind, Needed, IResult};
use nom::bytes::streaming::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"), Err(Err::Incomplete(Needed::new(1))));
assert_eq!(till_colon(""), Err(Err::Incomplete(Needed::new(1))));