Function nom::multi::many1_count

pub fn many1_count<I, O, E, F>(f: F) -> impl FnMut(I) -> IResult<I, usize, E> where
    I: Clone + InputLength,
    F: Parser<I, O, E>,
    E: ParseError<I>, 

Repeats the embedded parser until it fails and returns the number of successful iterations. Fails if the embedded parser does not succeed at least once.

Arguments

• f The parser to apply.

use nom::multi::many1_count;
use nom::bytes::complete::tag;

fn parser(s: &str) -> IResult<&str, usize> {
  many1_count(tag("abc"))(s)
}

assert_eq!(parser("abcabc"), Ok(("", 2)));
assert_eq!(parser("abc123"), Ok(("123", 1)));
assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Many1Count))));
assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Many1Count))));