#include <iostream>
using namespace std;
 
struct ghash {
     unsigned code;   // all the values you need here 
                      // may be some additional common hash functions
}; 
ostream& operator<< (ostream&os, ghash x) {  // for example a general display function
	return os<<"HASH "<<x.code; 
}
 
struct X { 
	int k; 
	int l;
 
    operator ghash () {  // conversion oeprator 
        ghash rh; 
        rh.code = (unsigned) k^l; // compute the hash
        return rh; 
    }
};
 
int main() {
    X myx; 
    myx.k=-1; 
    myx.l=20; 
 
    ghash hx = myx; // implicit converstion from X to its hash 
    cout<<hx <<endl; 
 
	return 0;
}

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