GNU bug report logs - #6017
23.1.96; savehist-printable for hash tables

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Message #8 received at 6017 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: "Drew Adams" <drew.adams <at> oracle.com>
Cc: 6017 <at> debbugs.gnu.org
Subject: Re: bug#6017: 23.1.96; savehist-printable for hash tables
Date: Fri, 23 Apr 2010 14:15:45 -0400

> IIUC, starting with Emacs 23.2, we can prin1 and read hash tables. If
> that's correct, then `savehist-printable' could presumably be updated to
> add this sexp to the cond: (hash-table-p value). IOW:
 
> (defun savehist-printable (value)
>   "Return non-nil if VALUE is printable."
>   (cond
>    ((stringp value))
>    ((numberp value))
>    ((symbolp value))
>    ((hash-table-p value))
>    (t
>     (with-temp-buffer
>       (condition-case nil
>    (let ((print-readably t) (print-level nil))
>    (prin1 value (current-buffer))
>    (read (point-min-marker))
>    t)
>  (error nil))))))

That won't check whether the contents of the has-table are
themsevles printable.


        Stefan

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