Re: missing operator !=

[Pierre Aubert <pierre dot aubert at echo dot fr>]

Stefan Seefeld <seefeld@sympatico.ca> writes:

> hi there, I'v just tried out a recent gcc snapshot, and I came
> across the following problem:
> 
> #include <list>
> #include <iterator>
> #include <cassert>
> 
> template <class T>
> class iterator : public std::iterator<std::bidirectional_iterator_tag, T>
> {
> public:
>    typedef iterator<T> self;
>    friend bool operator == <>(self, self);
> };
> 
> template <class T>
> inline bool operator==(iterator<T> x, iterator<T> y) { return true;}
> 
> int main(int, char **)
> {
>    iterator<int> i, j;
>    if (i != j);
> }
> 
> The compiler complains about an undefined operator != for the iterators.
> Shouldn't this operator be generated from the existing operator == ?
> Am I missing an include ?

I think generic operator!= is in namespace std::rel_ops and not in std

-- 
Pierre F. Aubert                          pierre.aubert(at)echo.fr
http://pierre(dot)aubert(dot)free(dot)fr  pierre.aubert(at)free.fr