pub trait ToWolfram {
    fn to_wolfram(&self) -> WolframValue;
    fn to_wolfram_string(&self) -> String {self.to_wolfram().to_string()}
    fn to_wolfram_bytes(&self) -> Vec<u8> {self.to_wolfram().to_bytes()}
    fn to_wolfram_solid(&self) -> Vec<u8> {self.to_wolfram().to_compressed()}
}

pub enum WolframValue {
    /// Function with name, args
    Function(Box<str>, Vec<WolframValue>),
    String(Box<str>),
    Bytes(Vec<u8>),
    Symbol(Box<str>),
    Integer8(i8),
    Integer16(i16),
    Integer32(i32),
    Integer64(i64),
    BigInteger(BigInt),
    /// Do not use `f64`, because partial order cannot be defined
    Decimal64([u8; 8]),
    BigDecimal(Box<str>),
    /// Need to optimize
    PackedArray(Vec<WolframValue>),
    /// Need to optimize
    NumericArray(Vec<WolframValue>),
    /// Record with key, rule, value
    Association(BTreeMap<WolframValue, (WolframValue, WolframValue)>),
    Rule,
    RuleDelayed,
}

pub enum SupportedFormat {
    JSON, //json
    TOML, //toml
    YAML, //yaml, yml
    Pickle, //pkl
}