Function sep_by

pub fn sep_by<F, P, S>(parser: P, separator: S) -> SepBy<F, P, S>
where
    F: FromIterator<<P as Parser>::Output>,
    P: Parser,
    S: Parser<Input = <P as Parser>::Input>,

Parses parser zero or more time separated by separator, returning a collection with the values from p. If the returned collection cannot be inferred type annotations must be supplied, either by annotating the resulting type binding let collection: Vec<_> = ... or by specializing when calling sep_by, sep_by::<Vec<_>, _, _>(...)

let mut parser = sep_by(digit(), token(','));
let result_ok = parser.parse("1,2,3");
assert_eq!(result_ok, Ok((vec!['1', '2', '3'], "")));
let result_ok2 = parser.parse("");
assert_eq!(result_ok2, Ok((vec![], "")));