using std::move with emplace/push_back

[tawmoto]

Hello,
I have this json containing an array

Json json{};
Json jsonAnimal = {{"name", "dog"}, {"age", 20}};

json["animals"].emplace_back(std::move(jsonAnimal));

Is it ok to use std::move on the last line, like I would do in a normal STL container?

Thanks

[nlohmann]

Yes, this is fine. Moved-from values will be null.

[tawmoto]

Great thanks!

[tawmoto]

Also I guess, this can be done also, not sure if it's more efficient
json["animals"].emplace_back(Json{{"name", "dog"}, {"age", 20}});

It seems that this does not compile:
json["animals"].emplace_back({{"name", "dog"}, {"age", 20}});