json class should have a get_or member function

[NotAPenguin0]

I found the need to write a free function

template<typename T>
void json_get_or(nlohmann::json const& j,
                 std::string_view key,
                 T& dest,
                 T const& default_val = T{}) {
    if (auto json_it = j.find(key); json_it != j.end()) {
        dest = (*json_it).get<T>();
    } else {
        dest = default_val;
    }
}

This way, I can get a value from a json object, and a default value if they key is not present. It would be great to have this as a member function of json, e.g.
int x = json.get_or<int>("x", 0); // 0 is default value

[nlohmann]

This function exists and it is called value().

[NotAPenguin0]

Didn't know about that one, thanks for the reply!