private ThreeAddressValueType GenVariable(LogicExprNode expr)
{
if (expr is BooleanNode)
{
return(new ThreeAddressLogicValue((expr as BooleanNode).Val));
}
if (expr is LogicIdNode)
{
return(new ThreeAddressStringValue((expr as LogicIdNode).Name.Name));
}
if (expr is LogicOpNode)
{
LogicOpNode op = expr as LogicOpNode;
string res = GenTempVariable();
ThreeAddressValueType arg1 = GenVariable(op.Left);
ThreeAddressValueType arg2 = GenVariable(op.Right);
ThreeOperator p = ThreeCode.ParseOperator(op.Operation);
AddCode(new ThreeCode(res, p, arg1, arg2));
return(new ThreeAddressStringValue(res));
}
if (expr is LogicNotNode)
{
LogicNotNode lnot = expr as LogicNotNode;
string res = GenTempVariable();
ThreeAddressValueType arg1 = GenVariable(lnot.LogExpr);
AddCode(new ThreeCode(res, ThreeOperator.Logic_not, arg1));
return(new ThreeAddressStringValue(res));
}
throw new Exception("UNKNOW VALUE. Send autors of ThreeAddressCode");
}
private ThreeAddressValueType GenVariable(ExprNode expr)
{
if (expr is IdNode)
{
return(new ThreeAddressStringValue((expr as IdNode).Name));
}
if (expr is DoubleNumNode)
{
return(new ThreeAddressDoubleValue((expr as DoubleNumNode).Num));
}
if (expr is IntNumNode)
{
return(new ThreeAddressIntValue((expr as IntNumNode).Num));
}
if (expr is BinOpNode)
{
BinOpNode op = expr as BinOpNode;
string res = GenTempVariable();
ThreeAddressValueType arg1 = GenVariable(op.Left);
ThreeAddressValueType arg2 = GenVariable(op.Right);
ThreeOperator p = ThreeCode.ParseOperator(op.Op);
AddCode(new ThreeCode(res, p, arg1, arg2));
return(new ThreeAddressStringValue(res));
}
throw new Exception("UNKNOW VALUE. Send autors of ThreeAddressCode");
}
public override void VisitAssignNode(AssignNode a)
{
if (a.Expr is BinOpNode binOp && (binOp.Left is IdNode || binOp.Left is DoubleNumNode || binOp.Left is IntNumNode) &&
(binOp.Right is IdNode || binOp.Right is DoubleNumNode || binOp.Right is IntNumNode))
{
ThreeAddressValueType arg1 = GenVariable(binOp.Left);
ThreeAddressValueType arg2 = GenVariable(binOp.Right);
AddCode(new ThreeCode(a.Id.ToString(), ThreeCode.ParseOperator(binOp.Op), arg1, arg2));
}
private void AddCode(ThreeCode c)
{
if (currentLabel.Length == 0)
{
program.AddLast(c);
return;
}
if (c.label.Length != 0 && currentLabel != c.label)
{
throw new Exception("Core error");
}
c.label = currentLabel;
currentLabel = "";
program.AddLast(c);
}
public override string ToString()
{
string res = "";
string lbl = "";
if (label.Length > 0)
{
lbl = label + ":";
}
res += $"{lbl,-11}";
if (operation == ThreeOperator.None)
{
return(res);
}
if (operation == ThreeOperator.Goto)
{
return(res + "goto " + arg1.ToString());
}
if (operation == ThreeOperator.IfGoto)
{
res += "if " + arg1.ToString() + " goto " + arg2.ToString();
return(res);
}
if (operation == ThreeOperator.Println)
{
return(res + "println " + arg1.ToString());
}
res += result + " = ";
if (operation == ThreeOperator.Logic_not)
{
return(res + "!" + arg1.ToString());
}
if (operation == ThreeOperator.Assign)
{
res += arg1.ToString();
}
else
{
res += arg1.ToString() + " " + ThreeCode.GetOperatorString(operation) + " " + arg2.ToString();
}
return(res);
}
public GraphNode(ThreeCode code, GraphNode l, GraphNode r)
{
this.code = code;
left = l;
right = r;
}
public GraphNode(ThreeCode code)
{
this.code = code;
left = null;
right = null;
}
public bool RightPartsEquals(ThreeCode x, ThreeCode y)
{
return(x.arg1.ToString() == y.arg1.ToString() && x.arg2.ToString() == y.arg2.ToString());
}