rocket::mtls::x509::der_parser::asn1_rs::nom::multi

Function count

Source 
pub fn count<I, O, E, F>(f: F, count: usize) -> impl FnMut(I)
where
    I: Clone + PartialEq,
    F: Parser<I, O, E>,
    E: ParseError<I>,
Available on crate feature mtls only.
Expand description

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

ยงArguments

  • 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)(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"])));