From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: Lisp object that refers to a C struct
Date: Tue, 16 Oct 2012 05:53:52 +0200 [thread overview]
Message-ID: <83bog33wdr.fsf@gnu.org> (raw)
In-Reply-To: <jwv391fz0ra.fsf-monnier+emacs@gnu.org>
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: emacs-devel@gnu.org
> Date: Mon, 15 Oct 2012 21:07:21 -0400
>
> > There's Lisp_Save_Value, which looks very promising,
>
> Lisp_Save_Value is a Lisp_Misc.
>
> > but why does its documentation say it's for record_unwind_protect?
> > Is there anything in it which would preclude its use
> > outside unwinding?
>
> It doesn't look very pretty when printed, so it's generally better not
> to expose it to users too much. If your value will usually not be
> visible to Elisp code, then Lisp_Save_Value is perfectly fine.
OK.
> Otherwise, better define your own type so that its printed
> representation can be more helpful, indicating what it's used for
How do I define my own type? In particular, what to do with gcmarkbit
in Lisp_Misc?
> (I presume it's for a file-watch-descriptor).
Yes.
next prev parent reply other threads:[~2012-10-16 3:53 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-15 21:24 Lisp object that refers to a C struct Eli Zaretskii
2012-10-16 1:07 ` Stefan Monnier
2012-10-16 3:53 ` Eli Zaretskii [this message]
2012-10-16 13:11 ` Stefan Monnier
2012-10-16 17:22 ` Eli Zaretskii
2012-10-16 21:43 ` Stefan Monnier
2012-10-17 4:05 ` Eli Zaretskii
2012-10-17 6:21 ` Stephen J. Turnbull
2012-10-17 15:50 ` Eli Zaretskii
2012-10-17 17:45 ` Stephen J. Turnbull
2012-10-17 13:34 ` Stefan Monnier
2012-10-17 16:08 ` Eli Zaretskii
2012-10-17 20:23 ` Stefan Monnier
2012-10-17 20:46 ` Eli Zaretskii
2012-10-17 22:08 ` Paul Eggert
2012-10-18 0:22 ` Stefan Monnier
2012-10-18 3:43 ` Stephen J. Turnbull
2012-10-18 4:50 ` Eli Zaretskii
2012-10-18 7:20 ` Paul Eggert
2012-10-18 11:09 ` Eli Zaretskii
2012-10-18 16:42 ` Paul Eggert
2012-10-18 17:21 ` Eli Zaretskii
2012-10-18 8:52 ` Juanma Barranquero
2012-10-18 11:17 ` Eli Zaretskii
2012-10-18 12:33 ` Stefan Monnier
2012-10-18 17:16 ` Eli Zaretskii
2012-10-18 22:09 ` Stefan Monnier
2012-10-19 7:14 ` Eli Zaretskii
2012-10-19 14:44 ` Stefan Monnier
2012-10-19 18:54 ` Eli Zaretskii
2012-10-19 21:35 ` Stefan Monnier
2012-10-19 22:35 ` Eli Zaretskii
2012-10-20 1:52 ` Stefan Monnier
2012-10-20 8:34 ` Eli Zaretskii
2012-10-17 16:05 ` Eli Zaretskii
2012-10-17 16:59 ` Davis Herring
2012-10-17 20:27 ` Stefan Monnier
2012-10-17 21:02 ` Eli Zaretskii
2012-10-18 0:23 ` Stefan Monnier
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