Function `many0`

fn many0<I, F>(f: F) -> impl Parser<I, Output = crate::lib::std::vec::Vec<<F as Parser<I>>::Output>, Error = <F as Parser<I>>::Error>
where
    I: Clone + Input,
    F: Parser<I>

Repeats the embedded parser, gathering the results in a Vec.

This stops on Err::Error and returns the results that were accumulated. To instead chain an error up, see [cut][crate::combinator::cut].

Arguments

f The parser to apply.

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

# use nom::{Err, error::ErrorKind, Needed, IResult, Parser};
use nom::multi::many0;
use nom::bytes::complete::tag;

fn parser(s: &str) -> IResult<&str, Vec<&str>> {
  many0(tag("abc")).parse(s)
}

assert_eq!(parser("abcabc"), Ok(("", vec!["abc", "abc"])));
assert_eq!(parser("abc123"), Ok(("123", vec!["abc"])));
assert_eq!(parser("123123"), Ok(("123123", vec![])));
assert_eq!(parser(""), Ok(("", vec![])));