Json

struct Value {
    enum Type { Null, Bool, Number, String, Array, Object };

    static Value Parse(const std::string& text);
    static Value Load(const std::string& filePath);
    static bool Save(const Value& val, const std::string& filePath);

    std::string Serialize(bool pretty = true, int indent = 0) const;
    bool AsBool(bool def = false) const;
    double AsNumber(double def = 0.0) const;
    int AsInt(int def = 0) const;
    std::string AsString(const std::string& def = "") const;

    const Value& operator[](const std::string& key) const;
    const Value& operator[](size_t index) const;
    Value& Set(const std::string& key, const Value& val);
    void Push(const Value& val);
};

Json::Value(true);              // Bool
Json::Value(42);                // Number (int)
Json::Value(3.14);              // Number (double)
Json::Value("hello");           // String
Json::Value obj;                // construct Object via Set()
Json::Value arr;                // construct Array via Push()