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* bug#27016: possible bug in `defsetf'
@ 2017-05-22  6:39 Rafael D Sorkin
  2017-05-22 12:11 ` npostavs
                   ` (7 more replies)
  0 siblings, 8 replies; 42+ messages in thread
From: Rafael D Sorkin @ 2017-05-22  6:39 UTC (permalink / raw)
  To: 27016; +Cc: Rafael D Sorkin

Hi, 

The second behavior below seems like a bug to me.  It was not
present in emacs 23.1

Best wishes, 
Rafael Sorkin


emacs-version				; 23.1.1
(setq pair (cons 3 4))			; (3 . 4)
(foobar pair)				; Symbol's function definition is void: foobar
(setf (foobar pair) 0)			; No setf-method known for foobar 
(unless t
  (defalias 'foobar 'cons)
  (defsetf foobar setcar))		; nil 
(foobar pair)				; same as above
(setf (foobar pair) 0)			; same as above
pair					; (3 . 4)


emacs-version				; 24.5.1
(setq pair (cons 3 4))			; (3 . 4)
(foobar pair)				; Symbol's function definition is void: foobar
(setf (foobar pair) 0)			; (foobar pair) is not a valid place expression 
(unless t
  (defalias 'foobar 'cons)
  (defsetf foobar setcar))		; nil 
(foobar pair)				; same as above
(setf (foobar pair) 0)			; 0       !
pair					; (0 . 4) !


~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
 Rafael Sorkin
 Perimeter Institute for Theoretical Physics
 31 Caroline Street North
 Waterloo, ON  N2L 2Y5
 Canada
~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-






^ permalink raw reply	[flat|nested] 42+ messages in thread

end of thread, other threads:[~2017-08-08  1:18 UTC | newest]

Thread overview: 42+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
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
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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