19. Implementing adapters

• Consider adapters when interfaces are quite similar.

  
      class Adapter : public Base {
      public:
          // Base functions
          //...
  
      private:
          Done m_done;
  
      };//class Adapter
  
  

• Or possibly:

  
      class Adapter : public Base, private Done
  
  

• Or build a two-way adapter, using multiple inheritance where both bases are public:

  
      class Adapter : public Base, public Done