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From: Michael Heerdegen <michael_heerdegen@web.de>
To: Noam Postavsky <npostavs@users.sourceforge.net>
Cc: 27016@debbugs.gnu.org, Rafael D Sorkin <rsorkin@perimeterinstitute.ca>
Subject: bug#27016: possible bug in `defsetf'
Date: Thu, 25 May 2017 23:31:13 +0200	[thread overview]
Message-ID: <87o9ugd3oe.fsf@drachen> (raw)
In-Reply-To: <CAM-tV-9eJQ75F2VEpO17ZtkZwkDBo_kvcVUzLPz1xbJv-m6-tg@mail.gmail.com> (Noam Postavsky's message of "Thu, 25 May 2017 16:42:50 -0400")

Noam Postavsky <npostavs@users.sourceforge.net> writes:

> Hmm, I thought it would cause the 'unless t' to happen in the
> macroexpansion phase as well, but I was wrong. Apparently 'eval-when'
> doesn't have this effect, only eval-when-compile or eval-and-compile
> will do the trick.

That also doesn't work.  Apart from the fact that you would have the
`defsetf' executed at compile time as side effect,

#+begin_src emacs-lisp
(macroexpand '(defsetf foo bar))
==>
'(lambda
   (do &rest args)
   (gv--defsetter 'foo
                  (lambda
                    (val &rest args)
                    `(,'bar ,@args ,val))
                  do args))
#+end_src

(i.e. a constant!).

When you compile a file with this content:

#+begin_src emacs-lisp
(eval-and-compile
  (unless nil
    (defsetf foo bar)))
#+end_src

you get an empty .elc.

Isn't that strange?


Michael.





  reply	other threads:[~2017-05-25 21:31 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-22  6:39 bug#27016: possible bug in `defsetf' Rafael D Sorkin
2017-05-22 12:11 ` npostavs
2017-05-22 20:25 ` Rafael D Sorkin
2017-05-22 21:18   ` npostavs
2017-05-22 23:10     ` Michael Heerdegen
2017-05-22 23:23       ` npostavs
2017-05-23  0:45         ` Michael Heerdegen
2017-05-23  0:51           ` npostavs
2017-05-23  1:18             ` Michael Heerdegen
2017-05-22 22:03 ` Rafael D Sorkin
2017-05-22 23:15   ` npostavs
2017-05-24  4:52 ` Rafael D Sorkin
2017-05-24 22:51   ` Michael Heerdegen
2017-05-25  1:50     ` npostavs
2017-05-25  4:59 ` Rafael D Sorkin
2017-05-25  5:01 ` Rafael D Sorkin
2017-05-25 10:38   ` npostavs
2017-05-25 20:26     ` Michael Heerdegen
2017-05-25 20:42       ` Noam Postavsky
2017-05-25 21:31         ` Michael Heerdegen [this message]
2017-05-25 23:03           ` npostavs
2017-05-25 23:40             ` Michael Heerdegen
2017-05-26  3:50 ` Stefan Monnier
2017-05-26 22:51   ` npostavs
2017-05-28 20:45     ` Stefan Monnier
2017-07-02 20:47       ` npostavs
2017-07-03 11:25         ` Michael Heerdegen
2017-07-09 20:13           ` npostavs
2017-07-10  0:26             ` Michael Heerdegen
2017-07-11  1:45               ` npostavs
2017-07-11 16:21             ` Stefan Monnier
2017-07-12  0:55               ` npostavs
2017-07-12  2:01                 ` Stefan Monnier
2017-07-13  4:46                   ` npostavs
2017-07-13 14:25                     ` Stefan Monnier
2017-07-14  0:39                       ` npostavs
2017-07-14  3:48                         ` Stefan Monnier
2017-07-14  4:32                           ` Stefan Monnier
2017-07-15 14:51                             ` npostavs
2017-07-16  1:03                               ` Stefan Monnier
2017-08-08  1:18                                 ` npostavs
2017-05-26  5:05 ` Rafael D Sorkin

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