Function cookie_factory::separated_list

pub fn separated_list<'a, 'b, 'c, F, G, I, It>(
    sep: F, 
    values: It
) -> impl SerializeFn<I> + 'a where
    F: SerializeFn<I> + 'b + 'a,
    G: SerializeFn<I> + 'c,
    It: 'a + Clone + Iterator<Item = G>, 

applies an iterator of serializers

use cookie_factory::{length, separated_list, string};

let mut buf = [0u8; 100];

let data = vec!["abcd", "efgh", "ijkl"];
let len = {
  let (len, _) = length(separated_list(string(","), data.iter().map(string)))(&mut buf[..]).unwrap();
  len
};

assert_eq!(len, 14usize);
assert_eq!(&buf[..14], &b"abcd,efgh,ijkl"[..]);