#ifndef ENUMERATOR
#define ENUMERATOR

template <typename T>
class Enumerator
{
public:
	virtual bool hasNext() const = 0;	// returns true if there is a next element
	virtual T next() = 0;				// returns copy of next element and advances to next position
	// throws ExceptionEnumerationBeyondEnd if no next item is available
	virtual T peek() const = 0;			// returns copy of next element without advancing position
	// throws ExceptionEnumerationBeyondEnd if no next item is available
};

#endif // !ENUMERATOR