public void Add(YuSymbolTableRow row)
{
if (this.IsContain(row))
{
throw new YuSymbolIsExistException();
}
this.Rows.Add(row);
}
private void RecTree(YuTreeNode node)
{
if (node.Children[0].Token.Type == ETokenType.ExpAdd)
{
this.RecTree(node.Children[0]);
}
else
{
if (node.Children[0].Token.Type == ETokenType.Symbol)
{
YuSymbolTableRow row = new YuSymbolTableRow(ESymbolType.Var, node.Children[0].Token);
if (this.SymbolTable.IsContain(row) == false)
{
throw new YuSymbolUndefinedException();
}
VMOp op = new VMOp(EOpCode.PushAddr, -1);
this.OpLst.Add(op);
this.NeedResolvLst.Add(new Tuple <VMOp, YuToken>(op, node.Children[0].Token));
}
else
{
this.OpLst.Add(new VMOp(EOpCode.Push, int.Parse(node.Children[0].Token.Text)));
}
}
if (node.Children[1].Token.Type == ETokenType.ExpAdd)
{
this.RecTree(node.Children[1]);
}
else
{
if (node.Children[1].Token.Type == ETokenType.Symbol)
{
YuSymbolTableRow row = new YuSymbolTableRow(ESymbolType.Var, node.Children[1].Token);
if (this.SymbolTable.IsContain(row) == false)
{
throw new YuSymbolUndefinedException();
}
VMOp op = new VMOp(EOpCode.PushAddr, -1);
this.OpLst.Add(op);
this.NeedResolvLst.Add(new Tuple <VMOp, YuToken>(op, node.Children[1].Token));
}
else
{
this.OpLst.Add(new VMOp(EOpCode.Push, int.Parse(node.Children[1].Token.Text)));
}
}
this.OpLst.Add(new VMOp(EOpCode.Add, 0));
}
public bool IsContain(YuSymbolTableRow row)
{
bool ret = false;
foreach (var r in this.Rows)
{
if (r.SymbolType == row.SymbolType && r.SymbolToken.Text.Equals(row.SymbolToken.Text))
{
ret = true;
break;
}
}
return(ret);
}
public void TranslateTree(YuTreeNode node)
{
if (node.Token.Type == ETokenType.ExpAdd)
{
this.RecTree(node);
}
else if (node.Token.Type == ETokenType.Var)
{
YuSymbolTableRow sr = new YuSymbolTableRow(ESymbolType.Var, node.Children[0].Token);
this.SymbolTable.Add(sr);
}
else if (node.Token.Type == ETokenType.Equal)
{
/*
* if (node.Children[1].Children[0].Token.Type == ETokenType.Number)
* {
* this.OpLst.Add(new VMOp(EOpCode.Push, int.Parse(node.Children[1].Children[0].Token.Text)));
* this.OpLst.Add(new VMOp(EOpCode.Push, int.Parse(node.Children[1].Children[1].Token.Text)));
* this.OpLst.Add(new VMOp(EOpCode.Add, 0));
* }
*/
this.RecTree(node.Children[1]);
YuSymbolTableRow row = new YuSymbolTableRow(ESymbolType.Var, node.Children[0].Token);
if (this.SymbolTable.IsContain(row) == false)
{
throw new YuSymbolUndefinedException();
}
VMOp op = new VMOp(EOpCode.Pop, -1);
this.OpLst.Add(op);
this.NeedResolvLst.Add(new Tuple <VMOp, YuToken>(op, node.Children[0].Token));
}
else if (node.Token.Type == ETokenType.Def)
{
YuSymbolTableRow sr = new YuSymbolTableRow(ESymbolType.Proc, node.Children[0].Token, node);
this.SymbolTable.Add(sr);
}
else if (node.Token.Type == ETokenType.Call)
{
VMOp op = new VMOp(EOpCode.Call, -1);
this.OpLst.Add(op);
this.NeedResolvLst.Add(new Tuple <VMOp, YuToken>(op, node.Children[0].Token));
}
else if (node.Token.Type == ETokenType.Eof)
{
this.OpLst.Add(new VMOp(EOpCode.End, 0));
}
}
