Iterator class for vector and basic_string

[Steinar Bang]

>>>>> Chip Salzenberg <chip@perlsupport.com>:

> According to Ryszard Kabatek:
>> I wrote an iterator class for std::vector<> and std::basic_string<>.

> Could someone please fill me in on why that's necessary?  I thought
> that plain old pointers were adequate iterators in these cases.

const_iterators and reverse_iterators are two uses that comes to mind.
Don't remember offhand if these are mandated for basic_string.