Re: how to have user defined hash for unordered_map ?

Hi,
  I want a user defined key for tr1 unordered_map.

My classes are,
template<typename T>
struct work{
    int count;
    work(int count) : count(count){}};

template<typename W>
class worker{
public:
    typedef worker<W> self_type;
    worker(W& w,int pos) : w_(&w),pos_(pos){}
    bool operator== (const self_type& other) const {
        assert(w_ == other.w_);
        return pos_ == other.pos_;
    }
private:
    W* w_;
    int pos_;
    friend std::size_t hash(const self_type& self){
        return self.pos_ + w_->count;
    }

};

and want to have worker class as key to map.
so calling is,
typedef work<int> WORK;
typedef worker<WORK> WORKER;
WORK w(2);
WORKER w1(w,1);
WORKER w2(w,2);
WORKER w3(w,3);
unordered_map<WORKER,int> m;
m.insert(std::make_pair(w1,5));

i have == op for worker.and either declaring a hash_value or hash
function is not working.
how can i do it?

thanks
abir