On Tue, Apr 27, 2010 at 1:59 PM, Leo Butler <l.butler at ed.ac.uk> wrote:
> How do I turn off the 'pretty printing' used by save?
> E.g. code saved by save looks like
>
> (#1# $Y (#2=(MSETQ) $DEPTH 10) (#2# $TYPE (#3=(MQUOTE) $FLOAT)))
>
> and I guess load uses a reader macro to expand #1 etc.
> I would like to see the expanded lisp form.
Oh, that's the result of the Lisp special variable *print-circle* ...
try this before save:
:lisp (setq *print-circle* nil)
Does that make a difference?
You can blame me for this. *print-circle* = t tells Lisp to try to
print circular data structures with references to stuff already
printed (that's what the #1# etc are about). With *print-circle* = nil,
circular structures can cause endless printing (effect probably
varies by Lisp implementation). The assume machinery creates
circular data structures so they are pretty common in Maxima.
I put the (setq *print-circle* t) into src/init-cl.lisp to prevent
problems when inspecting properties of variables which have
assume properties. Like this: (with Clisp)
(%i1) :lisp (setq *print-circle* nil)
NIL
(%i1) assume(x>0);
(%o1) [x > 0]
(%i2) :lisp (symbol-plist '$x)
*** - Lisp stack overflow. RESET
FWIW
Robert Dodier