/// <summary>
/// 使枚举数前进到 ETQueue<T> 的下一个元素。
/// </summary>
/// <returns></returns>
public bool MoveNext()
{
if (node == default(ETQueueNode <T>))
{
node = header;
}
else
{
node = node.NextNode;
}
return(node != null);
}
private T _Pop()
{
if (_Header == default(ETQueueNode <T>))
{
throw new EmptyNodeException("当前队列为空。");
}
else
{
T value = _Header.Value;
_Header = _Header.NextNode;
_Count--;
return(value);
}
}
private void _Add(ETQueueNode <T> node)
{
if (_Header == default(ETQueueNode <T>))
{
//建立首个节点
node.NextNode = default(ETQueueNode <T>);
node.PrevNode = default(ETQueueNode <T>);
_Header = node;
_LastNode = _Header;
}
else
{
//建立非首个节点
node.PrevNode = _LastNode;
_LastNode.NextNode = node;
_LastNode = node;
}
_Count++;
}
/// <summary>
/// 添加一个节点到队列
/// </summary>
/// <param name="node">要添加到队列的节点</param>
public void Add(ETQueueNode <T> node)
{
_Add(node);
}
/// <summary>
/// 释放由 ETEnumerator 使用的所有资源。
/// </summary>
public void Dispose()
{
node = null;
header = null;
}
/// <summary>
/// 重置位置
/// </summary>
public void Reset()
{
node = default(ETQueueNode <T>);
}
public ETEnumerator(ETQueueNode <T> header)
{
this.header = header;
}
public ETQueueNode(T value, ETQueueNode <T> prevNode)
: this(value, default(ETQueueNode <T>), prevNode)
{
}
public ETQueueNode(T value, ETQueueNode <T> nextNode, ETQueueNode <T> prevNode)
{
this._Value = value;
this._NextNode = nextNode;
this._PrevNode = prevNode;
}