How to returns the name of the upper object?

[3038922]

{
    "chassis": {
        "motor": {
            "left": {
                "prot": 1,
                "isRevase": false,
                "gear": 1
            },
            "right": {
                "prot": 2,
                "isRevase": true,
                "gear": 1
            },
        },
}

init()
{
 json data;
Motor left(data["chassis"]["motor"]["left"]);
Motor rigjt (data["chassis"]["motor"]["right"]);
}

class Motor
{
   Moror(json pragma):port(pragma["port"]),isRevase(pragma["isRevase"]),gear(pragma["gear"])
{
 name =???//i want get the motor's upper object ->" left" or "right"
}
std::string name;
};

[gregmarr]

There is no way to do this from within the library. You will need to pass that data into the Motor constructor yourself.

[3038922]

There is no way to do this from within the library. You will need to pass that data into the Motor constructor yourself.

thank you