Function winnow::multi::many0_count

pub fn many0_count<I, O, E, F>(f: F) -> impl FnMut(I) -> IResult<I, usize, E>where
    I: Stream,
    F: Parser<I, O, E>,
    E: ParseError<I>,

👎Deprecated since 0.3.0: Replaced with <code>many0</code>

Repeats the embedded parser, counting the results

This stops on ErrMode::Backtrack. To instead chain an error up, see cut_err.

Arguments

• f The parser to apply.

Warning: if the parser passed in accepts empty inputs (like alpha0 or digit0), many0 will return an error, to prevent going into an infinite loop

Example

use winnow::multi::many0_count;
use winnow::bytes::tag;

fn parser(s: &str) -> IResult<&str, usize> {
  many0_count(tag("abc"))(s)
}

assert_eq!(parser("abcabc"), Ok(("", 2)));
assert_eq!(parser("abc123"), Ok(("123", 1)));
assert_eq!(parser("123123"), Ok(("123123", 0)));
assert_eq!(parser(""), Ok(("", 0)));

WARNING: Deprecated, replaced with many0