How to initialise single object from map and key-value pair?

[fixgoats]

What I would like to do is something like

std::map<std::string, int> amap{{"a key", 0}};
json j{amap, {"some other key", 1}};

and have the output be [{"a key": 0, "some other key": 1}]. But when I try that, I get [{"a key": 0}, ["some other key", 1]]. Now, I can initialise j with just the map first, and then do j["some other key"] = 1 and get the desired output, but I think it would be great to be able to do this at initialisation.

[falbrechtskirchinger]

I don't think that's currently possible but shouldn't be too difficult to add.
However, you can do the following:

    std::map<std::string, int> amap{{"a key", 0}};
    json j{{"some other key", 1}};
    j.update(json(amap));

(Note that json(amap) and json{amap} produce different results!)

See https://json.nlohmann.me/api/basic_json/update/ for details.

[fixgoats]

Great, thanks for the quick answer and helpful suggestion.