to_json and from_json skip missing elements.

[Gringoniceguy]

Say we have the following code

struct person
{
    std::string name = "";
    int number = 0;
    NLOHMANN_DEFINE_TYPE_INTRUSIVE(person, name, number)
}

Now this is going to work fine now lets say we write this to a file.
We now add a another variable std::string address = "cool street";.
We still want the old data to work we just want address to be it's default, in this case "cool street".
Is there such a option to just skip element if it does not exist?

[nlohmann]

For this, you need to define your own to_json function to do so.,

[Gringoniceguy]

I found a better fix by just changing #define NLOHMANN_JSON_FROM(v1)
to just be wraped in a try catch.