---

ListAssignment.H

Go to the documentation of this file.

#ifndef _LISTASSIGNMENT_H
#define _LISTASSIGNMENT_H
#include <error.H>

namespace xchen
{
  
  template<typename ele_t, typename ele_iterator_t, int Sz>
  struct ListAssignmentCheckSzCt
  {
      ele_iterator_t iter;
      
      ListAssignmentCheckSzCt(ele_iterator_t itr) : iter(itr) { }

      ListAssignmentCheckSzCt<ele_t, ele_iterator_t, Sz-1> operator,(ele_t x)
      {
        *iter = x; 
        return ListAssignmentCheckSzCt<ele_t, ele_iterator_t, Sz-1>(iter+1);
      }
  };

  template<bool>
  struct ListAssignmentLargerThanSize;
  struct ListAssignmentLargerThanSize<false> { };

  template<typename ele_t, typename ele_iterator_t>
  struct ListAssignmentCheckSzCt<ele_t, ele_iterator_t, 0>
  {
      ele_iterator_t iter;
      ListAssignmentCheckSzCt(ele_iterator_t itr) : iter(itr) { }

      void operator,(ele_t x)
      {
        ListAssignmentLargerThanSize<true> error;
      }
  };




  template<typename ele_t, typename ele_iterator_t>
  struct ListAssignmentCheckSzRt
  {
      ele_iterator_t iter;
      int sz;
      ListAssignmentCheckSzRt(ele_iterator_t itr, int Sz) : iter(itr), sz(Sz) { }
      ~ListAssignmentCheckSzRt() 
      { 
        if(sz>0) error_exit("Too few elements in assignment list.\n");
      }

      ListAssignmentCheckSzRt<ele_t, ele_iterator_t>& operator=(ele_t x) { return operator,(x); }
      ListAssignmentCheckSzRt<ele_t, ele_iterator_t>& operator,(ele_t x)
      {
        if(!sz) 
          error_exit("Too many elements in assignment list.\n");

        *iter = x; 
        ++iter; --sz;
        return *this;
      }
  };

}//end namespace xchen


#endif

---