From: Juanma Barranquero <lekktu@gmail.com>
Cc: juri@jurta.org, emacs-devel@gnu.org
Subject: Re: Documentation not clear for the Lisp function set-variable
Date: Tue, 28 Jun 2005 11:26:28 +0200 [thread overview]
Message-ID: <f7ccd24b050628022638f5aa45@mail.gmail.com> (raw)
In-Reply-To: <f7ccd24b05062802171c8d08cf@mail.gmail.com>
> The patch below modifies `user-variable-p' [etc, etc.]
That would be more convincing if I really attached the patch...
(BTW, the patch uses diff -b because most of user-visible-p is now
inside a while loop, but otherwise unchanged.)
--
/L/e/k/t/u
Index: src/eval.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/eval.c,v
retrieving revision 1.246
diff -b -c -2 -r1.246 eval.c
*** src/eval.c 28 Jun 2005 02:27:38 -0000 1.246
--- src/eval.c 28 Jun 2005 08:34:08 -0000
***************
*** 890,899 ****
}
DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0,
! doc: /* Returns t if VARIABLE is intended to be set and
modified by users.
\(The alternative is a variable used internally in a Lisp program.)
! Determined by whether the first character of the documentation
! for the variable is `*' or if the variable is customizable (has a non-nil
! value of `standard-value' or of `custom-autoload' on its property list). */)
(variable)
Lisp_Object variable;
--- 890,911 ----
}
+ /* Error handler used in Fuser_variable_p. */
+ static Lisp_Object
+ user_variable_p_eh (ignore)
+ Lisp_Object ignore;
+ {
+ return Qnil;
+ }
+
DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0,
! doc: /* Return t if VARIABLE is intended to be set and
modified by users.
\(The alternative is a variable used internally in a Lisp program.)
! A variable is a user variable if
! \(1) the first character of its documentation is `*', or
! \(2) it is customizable (its property list contains a non-nil value
! of `standard-value' or `custom-autoload'), or
! \(3) it is an alias for another user variable.
! Return nil if VARIABLE is an alias and there is a loop in the
! chain of symbols. */)
(variable)
Lisp_Object variable;
***************
*** 904,907 ****
--- 916,927 ----
return Qnil;
+ /* If indirect and there's an alias loop, don't check anything else. */
+ if (XSYMBOL (variable)->indirect_variable
+ && NILP (internal_condition_case_1 (indirect_variable, variable,
+ Qt, user_variable_p_eh)))
+ return Qnil;
+
+ while (1)
+ {
documentation = Fget (variable, Qvariable_documentation);
if (INTEGERP (documentation) && XINT (documentation) < 0)
***************
*** 920,924 ****
--- 940,950 ----
|| (!NILP (Fget (variable, intern ("custom-autoload")))))
return Qt;
+
+ if (!XSYMBOL (variable)->indirect_variable)
return Qnil;
+
+ /* An indirect variable? Let's follow the chain. */
+ variable = XSYMBOL (variable)->value;
+ }
}
\f
next prev parent reply other threads:[~2005-06-28 9:26 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-19 11:14 Documentation not clear for the Lisp function set-variable Yoni Rabkin
2005-06-20 3:50 ` Richard Stallman
2005-06-20 8:21 ` Yoni Rabkin
2005-06-20 9:07 ` Juanma Barranquero
2005-06-21 2:00 ` Richard Stallman
2005-06-26 23:23 ` Juri Linkov
2005-06-27 13:04 ` Juanma Barranquero
2005-06-27 15:44 ` Juanma Barranquero
2005-06-27 16:09 ` Luc Teirlinck
2005-06-27 18:17 ` Juanma Barranquero
2005-06-27 18:45 ` Luc Teirlinck
2005-06-27 19:30 ` Juanma Barranquero
2005-06-28 18:47 ` Richard M. Stallman
2005-07-04 1:18 ` Luc Teirlinck
2005-07-04 16:48 ` Richard M. Stallman
2005-07-04 17:02 ` David Kastrup
2005-07-05 1:42 ` Luc Teirlinck
2005-07-05 16:12 ` Richard M. Stallman
2005-07-07 1:54 ` Luc Teirlinck
2005-07-07 21:30 ` Richard M. Stallman
2005-06-28 0:07 ` Juri Linkov
2005-06-28 8:32 ` Juanma Barranquero
2005-06-28 23:45 ` Juri Linkov
2005-06-29 9:14 ` Juanma Barranquero
2005-06-29 23:57 ` Juri Linkov
2005-06-30 8:16 ` Juanma Barranquero
2005-06-30 16:55 ` Luc Teirlinck
2005-06-30 19:34 ` Juanma Barranquero
2005-07-01 23:57 ` Juri Linkov
2005-07-02 4:11 ` Luc Teirlinck
2005-06-28 18:47 ` Richard M. Stallman
2005-06-29 2:32 ` Juanma Barranquero
2005-06-29 20:42 ` Richard M. Stallman
2005-06-27 18:39 ` Eli Zaretskii
2005-06-27 18:49 ` Luc Teirlinck
2005-06-27 21:38 ` Juanma Barranquero
2005-06-28 4:37 ` Eli Zaretskii
2005-06-28 8:33 ` Juanma Barranquero
2005-06-28 4:17 ` Richard M. Stallman
2005-06-28 9:17 ` Juanma Barranquero
2005-06-28 9:26 ` Juanma Barranquero [this message]
2005-06-28 16:09 ` Stefan Monnier
2005-06-28 16:19 ` Juanma Barranquero
2005-06-29 3:43 ` Stefan Monnier
2005-06-29 9:18 ` Juanma Barranquero
2005-06-29 3:59 ` Richard M. Stallman
2005-06-27 16:46 ` Richard M. Stallman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f7ccd24b050628022638f5aa45@mail.gmail.com \
--to=lekktu@gmail.com \
--cc=emacs-devel@gnu.org \
--cc=juri@jurta.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).