In CL there is a "type-of" operator that returns whether an atom/list
is a number, boolean, a list, whatever.
In Nu you can call "class" on any object except functions and macros
and it would do the same thing. But it doesn't work for functions and
macros. When encountering (myFunction class) nu would treat class as
Is there an equivalent to "type-of" in Nu where I can tell whether an
object is a function, macro, class instance, list?