/// <summary>
///
/// </summary>
/// <param name="various"></param>
/// <returns></returns>
public ISExp Execute(ISExp exp)
{
float result = 0;
LinkedSExp localExp = exp as LinkedSExp;
if (localExp == null)
{
return(null);
}
LinkedSExp p = localExp;
while (true)
{
if (p.cdr() == null)
{
break;
}
ISExp s = p.car();
if (s is Atom)
{
if ((s as Atom).Type == TokenType.INTEGER)
{
result += Int32.Parse((s as Atom).Name);
}
else if ((s as Atom).Type == TokenType.FLOAT)
{
result += float.Parse((s as Atom).Name);
}
}
else
{
return(null);// fail to execute;
}
p = (LinkedSExp)p.cdr();
}
//foreach (ISExp s in various)
//{
// if (s is Atom)
// {
// if ((s as Atom).Type == TokenType.INTEGER)
// {
// result += Int32.Parse((s as Atom).Name);
// }
// else if ((s as Atom).Type == TokenType.FLOAT)
// {
// result += float.Parse((s as Atom).Name);
// }
// }
// else
// {
// return null;// fail to execute;
// }
//}
return(new Atom(result.ToString(), TokenType.INTEGER));
}
public LinkedSExp(ISExp first, ISExp next)
{
this.first = first;
this.next = next;
}
public ISExp Execute(ISExp exp)
{
return(null);
}
