overloading operator =??

[mono]

I am trying to overload the operator = in order to allocate memory ex

Node ptr;
ptr = new Node;

But not sure how to do it with this struct part PriorityQueue::Item data;

#ifndef PQUEUE_H
#define PQUEUE_H
#include <stdlib.h> // Provides size_t

    struct Node; // This will be completely defined below.

    class PriorityQueue
    {
    public:
        typedef int Item;
        PriorityQueue( );
        PriorityQueue(const PriorityQueue& source);
        ~PriorityQueue( );
        void operator =(const PriorityQueue& source);
        size_t size( ) const { return many_nodes; }
        void insert(const Item& entry, unsigned int priority);
        Item get_front( );
        bool is_empty( ) const { return many_nodes == 0; }
    private:
 
        Node* head_ptr;
	size_t many_nodes;
    };

    struct Node
    {   // Node for a linked list
        PriorityQueue::Item data;
        unsigned int priority;
        Node *link;
    };

#endif