Function count

pub fn count<I, F>(
    parser: F,
    count: usize,
) -> impl Parser<I, Output = Vec<<F as Parser<I>>::Output>, Error = <F as Parser<I>>::Error>
where
    I: Clone,
    F: Parser<I>,

Runs the embedded parser count times, gathering the results in a Vec

Arguments

• f The parser to apply.
• count How often to apply the parser.

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

fn parser(s: &str) -> IResult<&str, Vec<&str>> {
  count(tag("abc"), 2).parse(s)
}

assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"])));
assert_eq!(parser("abc123"), Err(Err::Error(Error::new("123", ErrorKind::Tag))));
assert_eq!(parser("123123"), Err(Err::Error(Error::new("123123", ErrorKind::Tag))));
assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag))));
assert_eq!(parser("abcabcabc"), Ok(("abc", vec!["abc", "abc"])));