Method ToString

cpp/src/arrow/util/io_util.cc:413–417

  const char* type_id() const override { return kWinErrorDetailTypeId; }

  std::string ToString() const override {
    std::stringstream ss;
    ss << "[Windows error " << errnum_ << "] " << WinErrorMessage(errnum_);
    return ss.str();
  }

  int errnum() const { return errnum_; }