unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
From: Gregory Heytings <gregory@heytings.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: fgunbin@fastmail.fm, larsi@gnus.org, 52063@debbugs.gnu.org
Subject: bug#52063: 28.0.60; Confusing presentation of lambda
Date: Wed, 24 Nov 2021 22:37:53 +0000	[thread overview]
Message-ID: <664b6d0147ece2617779@heytings.org> (raw)
In-Reply-To: <jwv4k81qpos.fsf-monnier+emacs@gnu.org>


>> I'm annoyed by this misfeature.  If it means nothing to you and others, 
>> so be it.
>
> I fully understand desire to see function values printed as much as 
> possible as their original source code, but it's hard to reconcile this 
> with the needs of clean semantics, efficient execution, good code 
> analysis, ...
>

AFAIU, the fundamental question here is: is "(closure (t) args body)" 
different in any way from "(lambda args body)"?  If not, is there a good 
reason to use a "(closure (t)" instead of a "(lambda"?

FWIW, I'm running an Emacs with the following patch right now, which 
apparently breaks a couple of edebug tests in make check.  Apart from 
that, it seems that it doesn't change anything in the way Emacs behaves.

diff --git a/src/eval.c b/src/eval.c
index 94ad060773..5d02cabaf4 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -564,6 +564,8 @@ DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 
0,
      xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args));

    if (!NILP (Vinternal_interpreter_environment)
+      && !(EQ (Fcar (Vinternal_interpreter_environment), Qt) &&
+          NILP (Fcdr (Vinternal_interpreter_environment)))
        && CONSP (quoted)
        && EQ (XCAR (quoted), Qlambda))
      { /* This is a lambda expression within a lexical environment;





  reply	other threads:[~2021-11-24 22:37 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-23 18:56 bug#52063: 28.0.60; Confusing presentation of lambda Eli Zaretskii
2021-11-24  7:35 ` Lars Ingebrigtsen
2021-11-24 12:48   ` Eli Zaretskii
2021-11-24 12:51     ` Lars Ingebrigtsen
2021-11-24 13:15       ` Eli Zaretskii
2021-11-24 13:31         ` Lars Ingebrigtsen
2021-11-24 14:38           ` Eli Zaretskii
2021-11-24 16:21             ` Lars Ingebrigtsen
2021-11-24 16:33               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 16:54                 ` Eli Zaretskii
2021-11-24 17:19                   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 17:44                     ` Eli Zaretskii
2021-11-24 19:06                       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 19:53                         ` Eli Zaretskii
2021-11-24 20:08                           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 20:14                             ` Eli Zaretskii
2021-11-24 22:02                               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 22:33                               ` Jim Porter
2021-11-24 22:42                                 ` Jim Porter
2021-11-24 21:10                             ` Eduardo Ochs
2021-11-24 16:40             ` Filipp Gunbin
2021-11-24 16:54               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 18:18                 ` Filipp Gunbin
2021-11-24 19:08                   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 19:41                     ` Eli Zaretskii
2021-11-24 19:46                       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 19:59                         ` Eli Zaretskii
2021-11-24 20:23                           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-24 22:37                             ` Gregory Heytings [this message]
2021-11-25  0:09                               ` Filipp Gunbin
2021-11-25  8:57                               ` Michael Heerdegen
2021-11-25 13:09                                 ` Lars Ingebrigtsen
2021-11-25 14:08                                   ` Michael Heerdegen
2021-11-25 14:39                                   ` Gregory Heytings
2021-11-24 20:16                     ` Philipp Stephani
2021-11-24 21:44                       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-25  0:13                       ` Filipp Gunbin
2021-11-25 13:15                         ` Lars Ingebrigtsen
2021-11-25 19:07                           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-25 19:56                             ` Jim Porter
2021-11-26 12:28                               ` Lars Ingebrigtsen
2021-11-26 12:26                             ` Lars Ingebrigtsen
2021-11-26 13:13                               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-26 13:22                                 ` Lars Ingebrigtsen
2021-11-26 13:26                                   ` Lars Ingebrigtsen
2021-11-26 14:57                                     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-26 15:00                                       ` Lars Ingebrigtsen
2021-11-26 16:58                                         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-27 14:17                                           ` Lars Ingebrigtsen
2021-11-27 15:28                                             ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-29 13:54                                               ` Lars Ingebrigtsen
2021-11-29 17:58                                                 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-11-30 14:07                                                 ` Michael Heerdegen
2021-11-30 14:20                                                   ` Lars Ingebrigtsen
2021-11-24 16:56               ` Eli Zaretskii

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=664b6d0147ece2617779@heytings.org \
    --to=gregory@heytings.org \
    --cc=52063@debbugs.gnu.org \
    --cc=fgunbin@fastmail.fm \
    --cc=larsi@gnus.org \
    --cc=monnier@iro.umontreal.ca \
    /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).