auto operator()

in codelab/pi.cc [64:71]

• 8 lines of code
• 2 McCabe index (conditional complexity)

  auto operator()(const long a, const long b, int depth) const {
    if (depth > max_depth) {
      std::promise<bs_return_type> promise;
      promise.set_value(bs(a, b, depth));
      return promise.get_future();
    }
    return std::async(std::launch::async, bs, a, b, depth);
  };