Function many 

pub fn many<I: Input, T, E, F, U>(i: I, f: F) -> ParseResult<I, T, E>
where
    F: FnMut(I) -> ParseResult<I, U, E>,
    T: FromIterator<U>,

Parses many instances of f until it does no longer match, collecting all matches into the type T: FromIterator.

Note: Allocates data.

use chomp1::prelude::{many, parse_only, take_while1, token};

let r: Result<Vec<_>, _> = parse_only(
    |i| {
        many(i, |i| {
            take_while1(i, |c| c != b',' && c != b' ').bind(|i, c| token(i, b',').map(|_| c))
        })
    },
    b"a,bc,cd ",
);

assert_eq!(r, Ok(vec![&b"a"[..], &b"bc"[..]]));