The official specification for insert_many is that it returns both a list of inserted ID's, but also whether the transaction was acknowledged (https://docs.mongodb.com/manual/reference/method/db.collection.insertMany/). This is followed by PyMongo as well, but it seems that the C++ driver does not return this (http://mongodb.github.io/mongo-cxx-driver/api/mongocxx-v3/classmongocxx_1_1result_1_1insert__many.html).

Is there a reason for this?