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root/ccscs20/Iterator.hpp

Comparing Iterator.hpp (file contents):
Revision 6 by Douglas Thrift, 2004-05-12T23:40:15-07:00 vs.
Revision 7 by Douglas Thrift, 2004-05-14T00:13:01-07:00

#	Line 7 | Line 7
7		#ifndef _Iterator_hpp_
8		#define _Iterator_hpp_
9
10	+	#include "NullNode.hpp"
11	+
12	+	template<typename Type>
13	+	class DoublyLinkedList;
14	+
15		template<typename Type>
16		class Iterator
17		{
18		private:
19	<	//
19	>	NullNode<Type>* front;
20	>	NullNode<Type>* back;
21	>	NullNode<Type>* here;
22	>	Iterator(NullNode<Type>* front, NullNode<Type>* back, bool forward = true) : front(front), back(back) { here = forward ? front->getNext() : back->getPrevious(); }
23		public:
24	<	Iterator() {}
25	<	~Iterator() {}
26	<	const Iterator<Type>& operator++();
24	>	bool next(void) { return here->getNext() != back; }
25	>	bool previous(void) { return here->getPrevious() != front; }
26	>	Iterator<Type>& operator++() { here = here->getNext(); return *this; }
27		Iterator<Type> operator++(int);
28	<	const Iterator<Type>& operator--();
28	>	Iterator<Type>& operator--() { here = here->getPrevious(); return *this; }
29		Iterator<Type> operator--(int);
30	+	const Type& operator*() { return here->getValue(); }
31	+	// friends:
32	+	friend class DoublyLinkedList<Type>;
33		};
34
35	+	template<typename Type>
36	+	Iterator<Type> Iterator<Type>::operator++(int)
37	+	{
38	+	Iterator itor(*this);
39	+
40	+	++*this;
41	+
42	+	return itor;
43	+	}
44	+
45	+	template<typename Type>
46	+	Iterator<Type> Iterator<Type>::operator--(int)
47	+	{
48	+	Iterator itor(*this);
49	+
50	+	--*this;
51	+
52	+	return itor;
53	+	}
54	+
55		#endif // _Iterator_hpp_

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