rep_type.h

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#ifndef DDI_rep_type_h
#define DDI_rep_type_h

namespace DDI {
   
   template <class N, class I> 
   struct rep_traits
   {
      typedef N name_type;
      typedef typename I::value_type value_type;
      typedef typename I::pointer pointer;
      typedef typename I::reference reference;
   };
   
   template <class N, class I> 
   struct rep_traits<N,I*>
   {
      typedef N name_type;
      typedef I value_type;
      typedef I* pointer;
      typedef I& reference;
   };
   
   template <class N, class I>
   struct rep_type
   {
      rep_type() : second(0), init_(false) {}
      rep_type(const N & n, I i) : first(n), second(i), init_(false) 
      { if (i) init_=true; }
      virtual ~rep_type() {} // talk to Chris about this:  delete second; }
      N first;
      I second;
      bool init_;
      const typename rep_traits<N,I>::name_type & name() const { return first; }
      const typename rep_traits<N,I>::reference rep()  const { return *second; }
      typename rep_traits<N,I>::reference rep() { return *second; }
      I swap(I i) 
      { 
         I tmp(second); 
         second = i; 
         init_ = false;
         if (i) init_ = true;
         return tmp; 
      }  
      operator bool() const { return init_; }    
   };
}
#endif