On Wed, May 18, 2022 at 07:04:28AM +0200, Ralf Hemmecke wrote:
> >>>I do not see why you are doing this. If you want to call
> >>>'saySpadMsg' appropriate io hook should be enough. For
> >>>skipping line numbers setting '$IOindex' to NIL should
> >>>be enough.
> >>
> >>Well, not so easy. ;-) I could probably do this with the ioHook, but
> >>the Jupyter interface also has numbers for input/output. I use $IOindex to
> >>syncronize FriCAS step numbers with Jupyter numbers. Setting $IOindex to nil
> >>is thus counterproductive.
> >
> >You mean you read $IOindex?
>
> Yes I do.
>
> https://github.com/fricas/jfricas/blob/master/jfricas/webspad.lisp#L63
>
> ===================
> (defun ws-fmt (marker)
> (|sayMSG| (format nil "--FORMAT:~A:~D" marker boot::|$IOindex|)))
>
> (setf |$ioHook|
> (lambda (x &optional args)
> (cond
> ; ((eq x '|startAlgebraOutput|) (ws-fmt "BEG:Algebra"))
> ; ((eq x '|endOfAlgebraOutput|) (ws-fmt "END:Algebra"))
> ((eq x '|startPatternMsg|) (ws-fmt "BEG:ERROR"))
> ((eq x '|endPatternMsg|) (ws-fmt "END:ERROR"))
> ....
> ===================
>
> As long as nobody changes it inside a jfricas session, everything works
> fine. Do you see a problem with that?
> Any other option to read FriCAS' step number?
Well, the intent clearly was that "printing" produces a bundle
containing step number and value and that separationg step number
and value should be easy. ATM it seems that you prefer separate
code path to transfer step number. I wonder, maybe adding markers
around step number would better.
To say the truth it looks somewhat strange that you want to
suppres printing of step number but want its value.
--
Waldek Hebisch
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