Function nom::multi::many0

source · []
pub fn many0<I, O, E, F>(f: F) -> impl FnMut(I) -> IResult<I, Vec<O>, E> where
    I: Clone + InputLength,
    F: Parser<I, O, E>,
    E: ParseError<I>, 
This is supported on crate feature alloc only.
Expand description

Repeats the embedded parser until it fails and returns the results in a Vec.


  • f The parser to apply.

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

use nom::multi::many0;
use nom::bytes::complete::tag;

fn parser(s: &str) -> IResult<&str, Vec<&str>> {

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![])));