How to detect the last element in a for loop

[Bryan Olson]

Tom Verbeure wrote:
[...]
 >> > Given that you have an explicit iterator, wouldn't it be trivial to
 >>add an
 >> > 'end()' method to this iterator to indicate the end of the sequence
 >>(just
 >> > like C++ iterators) ?
 >> >
 >> > This would result in:
 >> >
 >> > for item in iterator:
 >> >     if iterator.next().end():
 >> >         do_something_special
 >> >
 >> >     do_something_for_all
 >>
 >>I think you've misunderstood the end() value in C++ STL iterators.  It
 >>is not the last item, but one past the last item.  The iterator can take
 >>the end value, but dereferencing the end value is illegal.
 >
 >
 > That would be the case if I would check for iterator.end(), but I 
check for
 > iterator.next().end() !

For a given C++ STL iterator, end() will return the *same* value no
matter how many times you advance the iterator.  It looks like you
wanted:

     ...
     if iterator.next() == iterator.end():
         do_something_special


--Bryan