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Non dereferencable iterator C++

Hi All,
I seem to be getting an error with my code when running Intel C++ compiler via Visual Studio 2005. The error generated is "Expression:map/set iterator not dereferencable"
I've given my code below in the hope that someone can spot the problem.
Many Thanks.......

Expand|Select|Wrap|Line Numbers
  2.     set<stl_index>::iterator  eit1, eit2=elmt_ids.begin();
  3.     bool                               non_consecutive(false);
  5.     // 0. checking whether the elements are consecutively numbered
  6.     for ( eit2++, eit1=elmt_ids.begin(); eit1!=elmt_ids.end(); eit1++, eit2++ )
  7.       if ( (*eit1)+1 != (*eit2) ) {
  8.            non_consecutive=true;
  9.            break; 
Feb 9 '08 #1
1 2840
9,208 Expert Mod 8TB
I have no idea why you are getting that error. I took your code and added other code (all assumptions) and got it to compile an link on Visual Studio.NET 2005.

This is what I compiled:
Expand|Select|Wrap|Line Numbers
  1. struct stl_index
  2. {
  3.     stl_index operator+(int arg) {stl_index temp; return temp;}
  4.     bool operator!=(stl_index  arg) {return true;}
  5. };
  6. set<stl_index> elmt_ids;
  7. void fx()
  8. {
  9. set<stl_index>::iterator  eit1, eit2=elmt_ids.begin();
  10.     bool                               non_consecutive(false);
  12.     // 0. checking whether the elements are consecutively numbered
  13.     for ( eit2++, eit1=elmt_ids.begin(); eit1!=elmt_ids.end(); eit1++, eit2++ )
  14.     {
  15.       if ( (*eit1)+1 != (*eit2) )
  16.       {
  17.            non_consecutive=true;
  18.            break;
  19.       }
  20.     }
  21. }
  22.       int main()
  23.       {
  25.       }
Feb 9 '08 #2

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