public bool newLayer(SymTableNode ptr)
{
/***************/
/******新建一层****/
/***************/
ScopeNode nptr = new ScopeNode();
nptr.front = ptr;
if (0 == scope.Count) nptr.parent = null;
else nptr.parent = scope.Peek();
scope.Push(nptr);
return true;
}
public SymTableNode FindID(String idname, bool ntype)
{
/***********************/
/*从符号表栈中查找已经声明的标示符*/
/****ntype=1时遍历所有层****/
/****ntype=0时遍历当前层****/
/***********************/
ScopeNode ptr = scope.Peek();
if (0 == scope.Count)
{
return(null);
}
while (ptr != null)
{
SymTableNode nptr = new SymTableNode();
nptr = ptr.front;
while (nptr != null)
{
if (nptr.name == null)
{
}
else if (nptr.name.Equals(idname))
{
return(nptr);
}
if (nptr.EOFL == true)
{
break;
}
nptr = nptr.next;
}
if (ntype == true)
{
ptr = ptr.parent;
}
else
{
break;
}
}
return(null);
}
public bool newLayer(SymTableNode ptr)
{
/***************/
/******新建一层****/
/***************/
ScopeNode nptr = new ScopeNode();
nptr.front = ptr;
if (0 == scope.Count)
{
nptr.parent = null;
}
else
{
nptr.parent = scope.Peek();
}
scope.Push(nptr);
return(true);
}