public override string go()
{
Lexems.Lexema l = getToken();
string s = "";
if (l == null) return "";
if (l.GetType().Name != "UnOperNot")
{
this.lexems.Add(l);
}
else
{
s = "\tnot bx\n";
}
while ((l = getToken()) != null)
{
this.lexems.Add(l);
}
SubExpression e=new SubExpression(this);
string result=e.go();
calculations = e.calculations;
string tmp = s;
if(result !=null)
{
s = result ;
}
s += "\tmov bx,"+e.result+"\n"+tmp+"\n";
this.result = "bx";
return s;
}
public override string go()
{
Lexems.Lexema l=null;
this.result = "ax";
string s=null;
while ((l = getToken()) != null && (this.command = isBinaryOperand(l)) == null)
{
if (l.GetType().Name == "Begin")
{
this.lexems.Add(l);
while ((l = getToken()) != null)
{
this.lexems.Add(l);
}
Operand o = new Operand(this);
string operand = o.go();
this.result = operand;
this.calculations = o.calculations;
return "\n";
}
this.lexems.Add(l);
}
if (l == null)
{
Operand o =new Operand(this);
string operand = o.go();
calculations = o.calculations;
if (operand != null)
{
}
else
{
addError(new BinaryOperatorOperandMissed(), 0);
}
return "\tmov ax," + operand+"\n";
}
SubExpression eL = new SubExpression(this);
string lOperand = eL.go();
while ((l = getToken()) != null )
{
this.lexems.Add(l);
}
SubExpression eR = new SubExpression(this);
string rOperand = eR.go();
if (lOperand == null||rOperand==null)
{
addError(new BinaryOperatorOperandMissed(), 0);
}
else
{
this.result="ax";
s = lOperand + "\n";
s += "\tmov ax," + eL.result+"\n";
s += rOperand + "\n";
s += "\t" + command + " ax," + eR.result+"\n";
}
return s;
}