AsyncPreQueryCallback Operation::appendCallback()

in squangle/mysql_client/Operation.cpp [364:380]

• 15 lines of code
• 6 McCabe index (conditional complexity)

AsyncPreQueryCallback Operation::appendCallback(
    AsyncPreQueryCallback&& callback1,
    AsyncPreQueryCallback&& callback2) {
  if (!callback1) {
    return std::move(callback2);
  }

  if (!callback2) {
    return std::move(callback1);
  }

  return [callback1 = std::move(callback1),
          callback2 = std::move(callback2)](FetchOperation& op) {
    return callback1(op).deferValue(
        [&op, callback2](auto&& /* unused */) { return callback2(op); });
  };
}