###My parser
###example
'''rust peg::parser!{ grammar list_parser() for str { rule number() -> u32 = n:$(['0'..='9']+) {? n.parse().or(Err("u32")) }
pub rule list() -> Vec<u32>
= "[" l:(number() ** ",") "]" { l }
} }
pub fn main() { assert_eq!(list_parser::list("[1,1,2,3,5,8]"), Ok(vec![1, 1, 2, 3, 5, 8])); } '''