From: Eli Zaretskii <eliz@gnu.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: 52566@debbugs.gnu.org
Subject: bug#52566: 29.0.50; Wishlist: There should be a print-unreadable-function variable
Date: Sat, 22 Jan 2022 16:48:44 +0200 [thread overview]
Message-ID: <83ee4zn7w3.fsf@gnu.org> (raw)
In-Reply-To: <87zgnnj1sk.fsf@gnus.org> (message from Lars Ingebrigtsen on Sat, 22 Jan 2022 15:14:03 +0100)
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Sat, 22 Jan 2022 15:14:03 +0100
>
> Lars Ingebrigtsen <larsi@gnus.org> writes:
>
> > It should be called from print_vectorlike (and any other places that
> > print unreadable objects, but I'm not sure there are any other places),
> > and should probably have a signature like
> >
> > OBJECT PRINTCHARFUN ESCAPEFLAG
> >
> > If it returns nil, the object should be printed as normal.
> >
> > This can then be used to implement a `readablep' function (that would
> > bind this to a function that signals an error, and then catch that
> > error), and also to possibly make an alternative version of prin1 that
> > returns whether it printed something unprintable.
>
> This has now been implemented in Emacs 29. The function interface was
> changed a bit, though.
The doc string of print-unreadable-function and its documentation in
the manual seem to contradict each other.
next prev parent reply other threads:[~2022-01-22 14:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-17 7:25 bug#52566: 29.0.50; Wishlist: There should be a print-unreadable-function variable Lars Ingebrigtsen
2022-01-22 14:14 ` Lars Ingebrigtsen
2022-01-22 14:48 ` Eli Zaretskii [this message]
2022-01-22 15:25 ` Lars Ingebrigtsen
2022-01-22 15:36 ` Eli Zaretskii
2022-01-22 15:46 ` Lars Ingebrigtsen
2022-01-22 16:18 ` Eli Zaretskii
2022-01-22 16:21 ` Lars Ingebrigtsen
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