static public void parse()
{
SourceViewModel.KeepOnlyRead();
Reset();
stateStack.Push(0);
tokenStack.Push(new Token(0, "#", TokenKind.END));
bool result = false;
bool breakThrough = false;
Lexer.Reset();
Action action;
FixAction fixAction;
token = Lexer.LexNext();
while (true)
{
if (token != null)
{
if (/*hasErr && token.kind == TokenKind.END || */ breakThrough)
{
break;
}
action = ActionTable.action(stateStack.Peek(), token.kind);
if (action != null)
{
switch (action.Kind)
{
case ActionType.ACCEPT:
result = true;
break;
case ActionType.SHIFT:
stateStack.Push(action.value);
tokenStack.Push(token);
token = Lexer.LexNext();
break;
case ActionType.REDUCE:
Reduce(action.value);
break;
case ActionType.ERROR:
fixAction = ActionTable.getFixAction(stateStack.Peek());
if (action.value != -1)
{
ErrorHandle(token, action.information);
}
hasErr = true;
if (fixAction != null)
{
switch (fixAction.Kind)
{
case ActionType.ACCEPT:
throw new NotImplementedException();
case ActionType.CHANGE:
stateStack.Push(fixAction.value);
if (fixAction.missToken.HasValue)
{
tokenStack.Push(new Token(token.offset, "", fixAction.missToken.Value));
}
else
{
breakThrough = true;
}
break;
case ActionType.ERROR:
breakThrough = true;
break;
case ActionType.SHIFT:
token = Lexer.LexNext();
if (token.kind == TokenKind.END)
{
breakThrough = true;
}
break;
case ActionType.REDUCE:
Reduce(fixAction.value);
break;
}
}
break;
}
if (result)
{
break;
}
}
else
{
break;
}
}
else
{
break;
}
}
if (result && !hasErr)
{
StateViewModel.Display("成功");
if (processStack.Count > 0)
{
ProcessViewModel.Add(processStack.Peek());
}
}
else
{
StateViewModel.Display("失败");
}
SourceViewModel.UnkeepOnlyRead();
}
