Function joinToString

CesiumUtility/include/CesiumUtility/joinToString.h:18–32

 */
template <class TIterator>
std::string
joinToString(TIterator begin, TIterator end, const std::string& separator) {
  if (begin == end)
    return std::string();

  std::string first = *begin;

  return std::accumulate(
      ++begin,
      end,
      std::move(first),
      [&separator](const std::string& acc, const std::string& element) {
        return acc + separator + element;
      });
}

/**
 * @brief Joins multiple elements together into a string, separated by a given