How to replace map to unordered_map

[Eagleyangs]

When I replace map with unordered_map, a compilation error occurs indicating that illegal expressions cannot be used.

Modified:
//typedef std::map ObjectValues;
typedef std::unordered_map ObjectValues;

  //return (*value_.map_) < (*other.value_.map_);
  return (*value_.map_) ! = (*other.value_.map_);

How can I do to make sure it compiles correctly and functions correctly?

[BillyDonahue]

This needs to be more precisely phrased to get an answer. It sounds like you're trying to mess with the internals of Json::Value.
I wouldn't recommend doing that unless you have a lot of experience with that kind of code.

[PatrickYuSuper]

Can JsonCPP support un-ordered map? The usage scenario is to except JSON object and write to a JSON file and preserving its original content/order.

[BillyDonahue]

Even if Jsoncpp did support unordered_map as the storage for object values, unordered_map doesn't preserve insertion order.