Non dereferencable iterator C++

[tonylamb]

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.......

 
    set<stl_index>::iterator  eit1, eit2=elmt_ids.begin();
    bool                               non_consecutive(false);
 
    // 0. checking whether the elements are consecutively numbered
    for ( eit2++, eit1=elmt_ids.begin(); eit1!=elmt_ids.end(); eit1++, eit2++ )
      if ( (*eit1)+1 != (*eit2) ) {
           non_consecutive=true;
           break; 

[weaknessforcats]

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:

struct stl_index
{
    stl_index operator+(int arg) {stl_index temp; return temp;}
    bool operator!=(stl_index  arg) {return true;}
};
set<stl_index> elmt_ids;
void fx()
{
set<stl_index>::iterator  eit1, eit2=elmt_ids.begin();
    bool                               non_consecutive(false);
 
    // 0. checking whether the elements are consecutively numbered
    for ( eit2++, eit1=elmt_ids.begin(); eit1!=elmt_ids.end(); eit1++, eit2++ )
    {
      if ( (*eit1)+1 != (*eit2) )
      {
           non_consecutive=true;
           break;
      }
    }
}
      int main()
      {
 
      }