Class Edge

Common/DataModel/vtkPolyhedron.cxx:80–97

// typedef std::pair<vtkIdType, vtkIdType> Edge;

struct Edge : public std::pair<vtkIdType, vtkIdType>
{
public:
  Edge() = default;
  Edge(vtkIdType a, vtkIdType b)
    : std::pair<vtkIdType, vtkIdType>(a, b)
  {
  }
  Edge(vtkCell* edge)
    : std::pair<vtkIdType, vtkIdType>(edge->GetPointId(0), edge->GetPointId(1))
  {
  }
  friend ostream& operator<<(ostream& stream, const Edge& e)
  {
    stream << e.first << " - " << e.second;
    return stream;
  }
};

struct hash_fn
{