On Thu, Feb 21, 2013 at 6:22 PM, Christian Henning <chhenning@gmail.com>wrote:
Hi Michael,
[...]
Note also that I think the requirement on InputIterator concept that Postincrement and dereference (*i++) be valid forces lazy evaluation. If you did eager reading/skipping somehow in increment you'd break that expression.
Yes, the postincrement operator is missing. I'll have to look up how it's usually implemented.
Here is a sketch of a possible implementation. http://codepad.org/9hjn3SpQ
I see you're using iterator_facade. I was a little afraid of using it since I have never used it before.
If you use iterator_facade, you wouldn't have to worry about defining the post-increment operator :) I don't think iterator_facade is difficult to read up on, it's just using CRTP to define some of the more boilerplate functions of an iterator in terms of others, which you define. E.g., the post-increment operator is implemented in terms of the pre-increment operator, the latter of which you define. operator!= is defined in terms of operator== for you as well. - Jeff