Custom priority queue comparator that accesses private members of a class

If you look at the code below, I am trying to create a priority_queue, I have named it DijkstraPriorityQueue, that has a custom comparator which also uses the private vector distTo.

You can see that I have some dots ....... as everything I tried have failed.

What is the cleanest solution (or possible solutions) to make this work as intended in this specific case ?

Dijkstra.h

class Dijkstra
{
public:
    Dijkstra(Graph G, int s);                          // Create
    ~Dijkstra();                                       // Destroy

private:
    bool compare(int u, int v)
    {
        return distTo[u] < distTo[v];
    }
    typedef priority_queue<int, vector<int>, .........> DijkstraPriorityQueue;


    vector<float>         distTo; // distTo[u] is the distance of the shortest s->u path 
    DijkstraPriorityQueue PQ;     // Min-Priority Queue, implemented for Dijkstra
};

Dijkstra.cpp

Dijkstra::Dijkstra(Graph G, int s)
{
     PQ = DijkstraPriorityQueue(...........);
}