pub fn take_until<F, Input, P>(end: P) -> TakeUntil<F, P> where
Input: Stream,
F: Extend<<Input as StreamOnce>::Token> + Default,
P: Parser<Input>,
Expand description
Takes input until end
is encountered or end
indicates that it has committed input before
failing (attempt
can be used to make it look like it has not committed any input)
let mut char_parser = take_until(char::digit());
assert_eq!(char_parser.parse("abc123"), Ok(("abc".to_string(), "123")));
let mut byte_parser = take_until(byte::bytes(&b"TAG"[..]));
assert_eq!(byte_parser.parse(&b"123TAG"[..]), Ok((b"123".to_vec(), &b"TAG"[..])));
assert!(byte_parser.parse(&b"123TATAG"[..]).is_err());
// `attempt` must be used if the `end` should be consume input before failing
let mut byte_parser = take_until(attempt(byte::bytes(&b"TAG"[..])));
assert_eq!(byte_parser.parse(&b"123TATAG"[..]), Ok((b"123TA".to_vec(), &b"TAG"[..])));