/// <summary>
/// 分析当前的符号。
/// </summary>
/// <param name="token">要分析的符号。</param>
public override void Parse(Token <T> token)
{
if (token.IsEndOfFile)
{
if (stateStack.Count == 1)
{
return;
}
}
while (true)
{
int state = stateStack.Peek();
ParseAction action = GetAction(state, token.Id);
switch (action.ActionType)
{
case ParseActionType.Shift:
Shift(token, action.Index);
goto ReduceByUnique;
case ParseActionType.Reduce:
Reduce(action.Index);
break;
case ParseActionType.Accept:
stateStack.Pop();
result = tokenStack.Pop();
return;
case ParseActionType.Error:
ReportError(state, token);
// ErrorRecovery(state, token.Id);
return;
}
}
ReduceByUnique:
// 尝试根据唯一归约进行归约。
while (true)
{
int state = stateStack.Peek();
ParseAction action = rule.States[state].Actions[Constants.UniqueIdx];
switch (action.ActionType)
{
case ParseActionType.Reduce:
Reduce(action.Index);
break;
case ParseActionType.Error:
return;
}
}
}
public void PeekTest()
{
list.Push(1);
list.Push(2);
list.Push(3);
Assert.AreEqual(list.Peek(), 3);
Assert.IsTrue(list.IsContaining(3));
}
private static void SafePopFromStack(ListStack<string> stack, Activity activity)
{
if (stack.Count == 0)
throw new InvalidOperationException("Стек пуст");
var top = stack.Peek();
if (string.CompareOrdinal(top, activity.Name) != 0)
throw new InvalidOperationException("На вершине стека другое действие: " + top);
stack.Pop();
}
private bool IsStackCorrectForExecuteActivity(Activity nextExecutingActivity)
{
lock (s_activitiesStackSync)
{
return
_executingActivitiesStack.Count == 0 ||
(nextExecutingActivity.Parent != null &&
_executingActivitiesStack.Peek() == nextExecutingActivity.Parent.Name);
}
}
private void ExecutingActivitiesStackPop()
{
lock (s_activitiesStackSync)
{
var popName = _executingActivitiesStack.Pop();
if (_trackingActivitiesStack.Count > 0 &&
string.CompareOrdinal(_trackingActivitiesStack.Peek(), popName) == 0)
_trackingActivitiesStack.Pop();
}
}
public override int Mark()
{
_realTokens.Push(_realTokens.Peek());
return(base.Mark());
}