public static Object third(params Object[] args)
{
Cons x = (Cons)arg(0, args);
if (x == null)
{
return(null);
}
return(Cons.Third(x));
}
internal IfExpression(Cons args, Env env, Interpreter interpreter, Loc loc)
{
this.loc = loc;
this.interpreter = interpreter;
Int32 len = Cons.Length(args);
if (len < 2 || len > 3)
{
throw new Exception("Wrong number of args for if");
}
test = interpreter.analyze(args.first, env, loc);
brtrue = interpreter.analyze(Cons.Second(args), env, loc);
if (len == 3)
{
brfalse = interpreter.analyze(Cons.Third(args), env, loc);
}
else
{
brfalse = new QuoteExpr(null);
}
}