rust_task_sasha_kma 0.1.0

My first parser with peg
Documentation 
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peg::parser! {
    pub grammar list_parser() for str {   
        rule number() -> u32
            = n:$(['0'..='9']+) {? n.parse().or(Err("u32")) }

        pub rule list() -> Vec<u32>
            = "[" nums:number() ** "," "]" { nums }
    }
}