text: // Taken from https://gist.github.com/arvidsson/7231973
  
  #ifndef AVIAN_REVERSE_ITERATOR_H
  #define AVIAN_REVERSE_ITERATOR_H
  
  /**
   * Template used for reverse iteration in C++11 range-based for loops.
   * 
   *   std::vector<int> v = {1, 2, 3, 4, 5};
   *   for (auto x : reverse_iterate(v))
   *       std::cout << x << " ";
   */
  
  template <typename T>
  class reverse_range
  {
      T &m_x;
      
  public:
      explicit reverse_range(T &x) : m_x(x) {}
      
      auto begin() const -> decltype(this->m_x.rbegin())
      {
          return m_x.rbegin();
      }
      
      auto end() const -> decltype(this->m_x.rend())
      {
          return m_x.rend();
      }
  };
   
  template <typename T>
  reverse_range<T> reverse_iterate(T &x)
  {
      return reverse_range<T>(x);
  }
  
  #endif // AVIAN_REVERSE_ITERATOR_H
  