Dear all,<br><br>I&#39;ve decided to write an ABC named BasicIterator, from which all derived iterators are to be descended. The reason being that I have to refer to iterators inside an interface and I need a general base type as a place holder to which I can refer. Besides, I don&#39;t want to use CRTP in the interface, but I don&#39;t care if I&#39;m forced to use it inside BasicIterator.<br>
<br>As discussed in the interoperability section of iterator_facade (<a href="http://www.boost.org/libs/iterator/doc/iterator_facade.html#interoperability">here</a>), the euqal() function must be templatized. The problem is that I have to make equal() a pure virtual member function in order to force derived types override it, but templated virtual functions on the other hand, are not valid.<br>
<br>So I was wondering what the best approach is. How can I achieve both of these goals? Please advise.<br><br>Any ideas/suggestions are welcome.<br>Thanks in advance<br>