//解析操作符
private bool P_Operator(Stack <TempOperator> operateStack, Stack <CodeObject> objectStack)
{
TempOperator curr = TempOperator.GetOper(PeekToken().Type);
if (curr == null)
{
return(false);
}
ReadToken();
while (operateStack.Count > 0)
{
TempOperator oper = operateStack.Peek();
if (oper.Level >= curr.Level)
{
operateStack.Pop();
CodeOperator binexp = new CodeOperator(objectStack.Pop(), objectStack.Pop(), oper.Operator);
objectStack.Push(binexp);
}
else
{
break;
}
}
operateStack.Push(curr);
return(true);
}
//获取一个Object
private CodeObject GetObject()
{
Stack <TempOperator> operateStack = new Stack <TempOperator>();
Stack <CodeObject> objectStack = new Stack <CodeObject>();
while (true)
{
objectStack.Push(GetOneObject());
if (!P_Operator(operateStack, objectStack))
{
break;
}
}
while (true)
{
if (operateStack.Count <= 0)
{
break;
}
TempOperator oper = operateStack.Pop();
CodeOperator binexp = new CodeOperator(objectStack.Pop(), objectStack.Pop(), oper.Operator);
objectStack.Push(binexp);
}
CodeObject ret = objectStack.Pop();
if (ret is CodeMember)
{
CodeMember member = ret as CodeMember;
if (member.Calc == CALC.NONE)
{
Token token = ReadToken();
switch (token.Type)
{
case TokenType.Assign:
case TokenType.AssignPlus:
case TokenType.AssignMinus:
case TokenType.AssignMultiply:
case TokenType.AssignDivide:
case TokenType.AssignModulo:
case TokenType.AssignCombine:
case TokenType.AssignInclusiveOr:
case TokenType.AssignXOR:
case TokenType.AssignShr:
case TokenType.AssignShi:
return(new CodeAssign(member, GetObject(), token.Type, m_strBreviary, token.SourceLine));
default:
UndoToken();
break;
}
}
}
return(ret);
}
private bool P_Operator(Stack <TempOperator> operateStack, Stack <CodeObject> objectStack)
{
TempOperator oper = TempOperator.GetOper(this.PeekToken().Type);
if (oper == null)
{
return(false);
}
this.ReadToken();
while (operateStack.Count > 0)
{
if (operateStack.Peek().Level < oper.Level)
{
break;
}
objectStack.Push(new CodeOperator(objectStack.Pop(), objectStack.Pop(), operateStack.Pop().Operator, this.m_strBreviary, this.GetSourceLine()));
}
operateStack.Push(oper);
return(true);
}
//解析操作符
private bool P_Operator(Stack <TempOperator> operateStack, Stack <CodeObject> objectStack)
{
TempOperator curr = TempOperator.GetOper(PeekToken().Type);
if (curr == null)
{
return(false);
}
ReadToken();
while (operateStack.Count > 0)
{
if (operateStack.Peek().Level >= curr.Level)
{
objectStack.Push(new CodeOperator(objectStack.Pop(), objectStack.Pop(), operateStack.Pop().Operator, m_strBreviary, GetSourceLine()));
}
else
{
break;
}
}
operateStack.Push(curr);
return(true);
}