Example to (de)serialize nested optional fields from the JSON string and to JSON

[matu3ba]

The showed examples did not hint onto any such functionality, so I am curious if this is a supported use case.
Ideally, the existence of the optional field would be written to a field inside the whole struct that defines the json.

If it is: Can you tell me, if and how much code bloat to expect?

NOTE: I searched for "optional fields" and "optional JSON fields" without, but found no related discussion.

[nlohmann]

Can you please provide an example what you want to achieve?

[nlohmann]

So is this about how a to_json/from_json function for such a struct should look like?

[matu3ba]

Yes.

[nlohmann]

• For from_json, you can use contains to check whether the optional keys are present and act accordingly.
• For to_json, you would need to decide based on the value of optional fields whether or not to serialize them by adding the respective keys to the JSON value.

[nlohmann]

@matu3ba Do you need further assistance with this issue?

[matu3ba]

No. I do consider this as answered. Thanks alot for the response.