RE: [boost] concatentate iterator adaptor

From: Bill Wade (bill.wade_at_[hidden])
Date: 2002-03-20 08:51:49

This is undefined even for random access iterators when x.base() is past the
end of the container.
Think about how a deque iterator will behave if you increment it well beyond
the end of the deque.

> >>>>> "Gennadiy" == Gennadiy Rozental <rogeeff_at_[hidden]> writes:
>
> Thanks for the pointer.  Interesting.  I think what the joining
> iterator is doing is depending on a state variable to switch between 2
> iterator ranges?
>
> Not quite what I was looking for.  I'm thinking something like this:
> This will switch automatically.  Probably only works for random_access.
>
> 	if (x.base() - b1 >= e1 - b1)
> 	  return *(b2 + (x.base() - e1));
> 	else
> 	  return *(x.base());