24#ifndef vtkInformationInternals_h
25#define vtkInformationInternals_h
30#define VTK_INFORMATION_USE_HASH_MAP
31#ifdef VTK_INFORMATION_USE_HASH_MAP
32#include <unordered_map>
43#ifdef VTK_INFORMATION_USE_HASH_MAP
48 typedef std::unordered_map<KeyType, DataType, HashFun>
MapType;
50 typedef std::map<KeyType, DataType>
MapType;
54#ifdef VTK_INFORMATION_USE_HASH_MAP
63 for (MapType::iterator i = this->Map.begin(); i != this->Map.end(); ++i)
67 value->UnRegister(
nullptr);
76#undef VTK_INFORMATION_USE_HASH_MAP
abstract base class for most VTK objects