How to add json to another json?

[TrueWodzu]

Hi,

I am struggling a little when trying to add one json to another. Let me explain:

FramePickingResult PickFrame(int current_frame_number)
{
	if (current_frame_number > frames.back())
		return FramePickingResult::Abort;
	if (current_frame_number == frames[frame_index])
	{
		++frame_index;
		return FramePickingResult::Pick;
	}
	else
		return FramePickingResult::Skip;
}

std::optional<nlohmann::json> B()
{
	nlohmann::json result;
	result["B"] = {
		{ "SomeOtherObject", 34578}
	};
	return result;
};

std::optional<nlohmann::json> C()
{
	nlohmann::json result;
	result["C"] = {
		{ "Name", "Mark"}
	};
	return result;
};


int main(int argc, char* argv[])
{
	nlohmann::json json;
	json["Profiles"] = {};
	if (auto json_b = B())
	{
		// Add this to "Profiles"
	}

	if (auto json_c = C())
	{
		// Add this to "Profiles"
	}
}

{ "Profiles" : { "B" : { "SomeOtherObject: : 34578 }, "C" : { "Name" : "Mark" } } }

How can I achieve that? I would like to avoid using initializer list, thanks.
EDIT: To be honest I don't even know how to construct this with initializer list ;)

[TrueWodzu]

I think I've figured it out, is this an optimal way?

int main(int argc, char* argv[])
{
	nlohmann::json json;
	json["Profiles"] = {};
	if (auto json_b = B())
	{
		json["B"] = json_b.value()["B"];
	}

	if (auto json_c = C())
	{
		json["C"] = json_c.value()["C"];
	}
}

[nlohmann]

You may want to use the update function instead:

int main(int argc, char* argv[])
{
    nlohmann::json json;
    json["Profiles"] = {};
    if (auto json_b = B())
    {
        json.update(json_b.value());
    }
    
    if (auto json_c = C())
    {
        json.update(json_c.value());
    }
    
    std::cout << json << std::endl;
}