From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Helmut Eller <eller.helmut@gmail.com>
Cc: 8711@debbugs.gnu.org
Subject: bug#8711: 24.0.50; binding _ to unused values with lexical-binding
Date: Mon, 23 May 2011 21:56:43 -0300 [thread overview]
Message-ID: <jwvei3oj4wm.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <m2ipt1b2ax.fsf@gmail.com> (Helmut Eller's message of "Mon, 23 May 2011 22:16:22 +0200")
>> It can insert (ignore nil) instead which should have the same effect but
>> without triggering the other warning with lexical-binding.
> Indeed. But I quickly run into another case where that doesn't help:
> (defun foo (x) (destructuring-bind (y &rest _) x y))
I don't see any warning for this code. What warning do you get?
> The semantic of loop (in Common Lisp) allows both variants. So the
> "portable" idiom is "collect (let ((value value)) (lambda () value))".
Interesting. I didn't think they'd accept the alternate semantic, which
is clearly less useful and less efficient at the same time (tho maybe
there are implementation strategies that may not make it that much less
efficient).
Stefan
next prev parent reply other threads:[~2011-05-24 0:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-21 18:44 bug#8711: 24.0.50; binding _ to unused values with lexical-binding Helmut Eller
2011-05-23 9:01 ` Lawrence Mitchell
2011-05-23 14:24 ` Stefan Monnier
2011-05-23 18:23 ` Helmut Eller
2011-05-23 19:29 ` Stefan Monnier
2011-05-23 20:16 ` Helmut Eller
2011-05-24 0:56 ` Stefan Monnier [this message]
2011-05-24 6:01 ` Helmut Eller
2011-05-24 12:42 ` Stefan Monnier
2011-06-02 11:17 ` Juanma Barranquero
2011-06-02 12:45 ` Stefan Monnier
2011-06-02 13:41 ` Juanma Barranquero
2011-06-02 14:00 ` Stefan Monnier
2011-06-02 17:10 ` Juanma Barranquero
2011-05-23 20:32 ` Helmut Eller
2011-05-24 0:51 ` Stefan Monnier
2022-05-08 12:33 ` bug#8711: bug#26960: 26.0.50; Complaints about unused variable in cl-destructuring-bind Lars Ingebrigtsen
2022-05-08 13:32 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-09 9:25 ` bug#8711: " Lars Ingebrigtsen
2022-05-09 12:26 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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