// 返回栈顶元素
// return:
// 返回ReversePolishItem对象
public ReversePolishItem Peek()
{
if (this.Count == 0)
{
StackUnderflowException ex = new StackUnderflowException("Pop前,堆栈已经空");
throw (ex);
}
ReversePolishItem oTemp = (ReversePolishItem)this[this.Count - 1];
return(oTemp);
}
// pop一个对象
// return:
// ReversePolishItem对象
public ReversePolishItem Pop()
{
if (this.Count == 0)
{
StackUnderflowException ex = new StackUnderflowException("Pop前,堆栈已经空");
throw (ex);
}
ReversePolishItem oTemp = (ReversePolishItem)this[this.Count - 1];
this.RemoveAt(this.Count - 1);
//可能返回空，调用者错用了类型，应在调用处做判断。
return(oTemp);
}
// pop一个对象，只返回节点
// return:
// node节点
public XmlNode PopNode()
{
//栈为空，抛出StackUnderflowException异常
if (this.Count == 0)
{
StackUnderflowException ex = new StackUnderflowException("Pop前,堆栈已经空");
throw (ex);
}
ReversePolishItem oTemp = (ReversePolishItem)this[this.Count - 1];
this.RemoveAt(this.Count - 1);
//可能返回空，调用者错用了类型，应在调用处做判断。
return(oTemp.m_node);
}
// 返回栈顶元素
// return:
// 返回ReversePolishItem对象
public ReversePolishItem Peek()
{
if (this.Count == 0)
{
StackUnderflowException ex = new StackUnderflowException("Pop前,堆栈已经空");
throw (ex);
}
ReversePolishItem oTemp = (ReversePolishItem)this[this.Count - 1];
return oTemp;
}
// pop一个对象
// return:
// ReversePolishItem对象
public ReversePolishItem Pop()
{
if (this.Count == 0)
{
StackUnderflowException ex = new StackUnderflowException("Pop前,堆栈已经空");
throw (ex);
}
ReversePolishItem oTemp = (ReversePolishItem)this[this.Count - 1];
this.RemoveAt(this.Count - 1);
//可能返回空，调用者错用了类型，应在调用处做判断。
return oTemp;
}
// pop一个对象，只返回节点
// return:
// node节点
public XmlElement PopNode()
{
//栈为空，抛出StackUnderflowException异常
if (this.Count == 0)
{
StackUnderflowException ex = new StackUnderflowException("Pop前,堆栈已经空");
throw (ex);
}
ReversePolishItem oTemp = (ReversePolishItem)this[this.Count - 1];
this.RemoveAt(this.Count - 1);
//可能返回空，调用者错用了类型，应在调用处做判断。
return oTemp.m_node;
}