Re: g++ 4: error: no type named ‘iterator_category’ in ‘class myclass’

[red floyd]

Johannes Zellner wrote:
> Hello,
>
> with g++ 4 (4.0.1) I get the message
>
> {...}/stl_iterator_base_types.h:129: error: no type named 
> ‘iterator_category’ in ‘class myclass’
>
> where all my code (including myclass) compiled with previous g++ versions
> (e.g. g++ 3.3 / g++ 3.4).
>
> I believe that myclass is a valid output iterator class, e.g. for
> std::copy, e.g.
>
>     class myclass
>     {
>     public:
>         myclass();
>         myclass& operator = (int);
>         myclass& operator ++ ();
>         myclass& operator * ();
>     };
>
> What's the problem?
>
> Any help much appreciated!


I think you need to instantiate std::iterator_traits<> for myclass.

Look at #include <iterator>