internal Object loadf(params Object[] args)
        {
            String path = (String)Primitives.arg(0, args);

            return(LoadFile(path));
        }
        internal Object internf(params Object[] args)
        {
            String sym = (String)Primitives.arg(0, args);

            return(symbolTable.intern(sym));
        }
        internal Object evalf(params Object[] args)
        {
            Object x = Primitives.arg(0, args);

            return(eval(x, globalenv));
        }