From: Michael Heerdegen <michael_heerdegen@web.de>
To: Tassilo Horn <tsdh@gnu.org>
Cc: 35546@debbugs.gnu.org
Subject: bug#35546: 27.0.50; setf return value for new alist entries is wrong
Date: Tue, 07 May 2019 15:43:28 +0200 [thread overview]
Message-ID: <878svimlbz.fsf@web.de> (raw)
In-Reply-To: <87ftpqmrz9.fsf@web.de> (Michael Heerdegen's message of "Tue, 07 May 2019 13:19:54 +0200")
Michael Heerdegen <michael_heerdegen@web.de> writes:
> Tassilo Horn <tsdh@gnu.org> writes:
>
> > According to the last sentence, I'd assume that
> >
> > (setq my-alist nil)
> > (setf (alist-get 'foo my-alist) "foo-value")
> >
> > would return "foo-value", but infact it returns ((foo . "foo-value")).
I quickly looked if there are any more such cases in gv.el. I found
'cons' and 'logand'. While 'cons' also seems easy to fix, I'm
struggling with 'logand', because I don't understand what it is doing.
Not only that "it should arguably fail when trying to set a value
outside of the mask" as described in the file header, I also don't see
how the used formula makes more sense than setting the place to just V.
Michael.
next prev parent reply other threads:[~2019-05-07 13:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-03 13:49 bug#35546: 27.0.50; setf return value for new alist entries is wrong Tassilo Horn
2019-05-07 11:19 ` Michael Heerdegen
2019-05-07 13:43 ` Michael Heerdegen [this message]
2019-05-07 14:58 ` npostavs
2019-05-07 15:56 ` Michael Heerdegen
2019-05-07 16:50 ` npostavs
2020-04-12 12:26 ` Štěpán Němec
2020-04-12 12:34 ` Noam Postavsky
2020-04-12 12:47 ` Štěpán Němec
2020-04-13 1:01 ` Michael Heerdegen
2020-08-19 10:34 ` Lars Ingebrigtsen
2020-08-25 16:16 ` Štěpán Němec
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