//===========================================================================
// Class declaration for data items.
// A. Fischer, May 29, 2001                                  file: item.hpp
//===========================================================================
#pragma once
#include <climits>
#include "exam.hpp"
#include "ordered.hpp"

//--------------------------------------------------------------------------
class Item : public Exam, public Ordered<int> {
  public:
    static const int max_sentinel = int(INT_MAX);
    static const int min_sentinel = int(INT_MIN);

    Item(const char* init, int sc): Exam(init, sc){}
    ~Item() { cout <<"Deleting Item " << score <<"\n"; }

    int  key()                     const { return score; }

    // Exam ordering operators
    bool operator< (const int& k) const { return key() < k; }
    bool operator==(const int& k) const { return key() == k; }

// The symbol PRIMARY_INTERFACE describes which of two alternative Ordered
// interfaces to implement
#ifdef PRIMARY_INTERFACE
    // Promises fulfilled by Exam ordering operators above

    // Comparison with another Item is defined in terms of the above
    bool operator< (const Item& s) const { return key() < s.key(); }
    bool operator==(const Item& s) const { return key() == s.key(); }
#else
    // Promises fulfilled by operators below and by key() function.
    // These subsume the Item comparison operators of the PRIMARY_INTERFACE
    bool operator< (const Ordered<int>& s) const { return key() < s.key(); }
    bool operator==(const Ordered<int>& s) const { return key() == s.key(); }
#endif
};