public static Sexpr sin(Sexpr arg)
{
if (arg.isConstant())
return new Constant(Math.Sin(arg.getValue()));
else
return new Sin(arg);
}
public static Sexpr sub(Sexpr l, Sexpr r)
{
if(l.isConstant() && r.isConstant())
return new Constant(l.getValue() - r.getValue());
else if(l.isZero())
return new Negation(r);
else if(r.isZero())
return l;
else
return new Subtraction(l,r);
}
public static Sexpr mult(Sexpr l, Sexpr r)
{
if(l.isConstant() && r.isConstant())
return new Constant(l.getValue() * r.getValue());
else if(l.isZero() || r.isZero())
return new Constant(0);
else if(l.isOne())
return r;
else if(r.isOne())
return l;
else
return new Mult(l,r);
}
public static Sexpr neg(Sexpr tecken)
{
if (tecken.isConstant())
return new Constant(-(tecken.getValue()));
else
return new Negation(tecken);
}
public static Sexpr log(Sexpr arg)
{
if (arg.isConstant())
return new Constant(Math.Log(arg.getValue()));
else
return new Log(arg);
}
public static Sexpr exp(Sexpr arg)
{
if (arg.isConstant())
return new Constant(Math.Exp(arg.getValue()));
else
return new Exp(arg);
}
public static Sexpr div(Sexpr l, Sexpr r)
{
if(r.isZero())
throw new CalculatorException("F�r inte dela med noll");
else
{
if(l.isConstant() && r.isConstant())
return new Constant(l.getValue() / r.getValue());
else if(l.isZero())
return new Constant(0);
else
return new Div(l,r);
}
}
public static Sexpr cos(Sexpr arg)
{
if (arg.isConstant())
return new Constant(Math.Cos(arg.getValue()));
else
return new Cos(arg);
}
public static Sexpr add(Sexpr l, Sexpr r)
{
if (l.isConstant() && r.isConstant())
{
Sexpr ret = new Constant(l.getValue() + r.getValue());
// return new Constant(l.getValue() + r.getValue());
return ret;
}
else if (l.isZero())
return r;
else if (r.isZero())
return l;
else
return new addition(l, r);
}
