private IEnumerable <T> CreateEnumerator(LinkedList <T> list,
LinkedListNode <T> start,
TIteratorDirection dir)
{
LinkedListNode <T> current = null;
do
{
if (current == null)
{
current = start;
}
else
{
if (dir == TIteratorDirection.Forward)
{
current = current.Next;
}
else
{
current = current.Previous;
}
}
if (current != null)
{
yield return(current.Value);
}
} while(current != null);
}
public BidirectionalIterator(LinkedList <T> list,
LinkedListNode <T> start,
TIteratorDirection dir)
{
enumerator = CreateEnumerator(list,
start,
dir).GetEnumerator();
enumType = enumerator.GetType();
}
