Ether Jones <maxima at etherjones.us> writes:
> (%i1) :lisp (defmacro $dd (x) `(progn (displa '((mlable) Raw ,x)) (terpri) ',x))
> ????? dd(x/x);
>
> Maxima encountered a Lisp error:
> ? Error in PROGN [or a callee]: The variable DD is unbound.
> Automatically continuing.
> To enable the Lisp debugger set *debugger-hook* to nil.
That's because the dd(x/x) should have been on a new line. What you
typed made the lisp try to evaluate three forms
(defmacro $dd (x) `(progn (displa '((mlable) Raw ,x)) (terpri) ',x))
dd
(x/x)
the third calls a (nonexistant) function called x/x. If the "dd" form
hadn't caused your lisp implementation to error out, it would have done
too.
Rupert
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