Member bsoncxx::oid::oid (init_tag_t tag): This constructor for bsoncxx::oid is still supported but deprecated.
Member bsoncxx::oid::operator bool () const: Uninitialized oids can no longer be created so this function will always return True.
Class bsoncxx::types::b_dbpointer: A BSON DBPointer (aka DBRef) is still supported but deprecated.
Class bsoncxx::types::b_symbol: This BSON type is deprecated and use by clients is discouraged.
Class bsoncxx::types::b_undefined: This BSON type is deprecated and use by clients is discouraged.