From: LdBeth <andpuke@foxmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: LdBeth <andpuke@foxmail.com>, Tomas Hlavaty <tom@logand.com>,
emacs-devel@gnu.org
Subject: Re: using finalizers
Date: Fri, 31 Dec 2021 12:30:42 +0800 [thread overview]
Message-ID: <tencent_4CC28DA9FBCB31B64701835E87D4CAFF4F05@qq.com> (raw)
In-Reply-To: <jwv35m94fqf.fsf-monnier+emacs@gnu.org>
>>>>> In <jwv35m94fqf.fsf-monnier+emacs@gnu.org>
>>>>> Stefan Monnier <monnier@iro.umontreal.ca> wrote:
Stefan> I don't think Scheme's `letrec` works any differently in this respect,
Stefan> except that instead of nil, variables get a special "void like" value
Stefan> before they're initialized.
Right. With that "void" like value, a sane Scheme would probably
signal error at runtime. The simple letrec subr.el macro does not do
that check.
Stefan> In the above code, the real bug I can see which we should fix is that
Stefan> `make-finalizer` should signal an error if its arg is not a function.
There's nothing wrong with the behavior of `make-finalizer`, it just
treats a symbol as a function specifier, just like elisp does not
doing anything to prevent a user from `fset' symbol `nil' and
`(funcall nil)'.
--
LDB
next prev parent reply other threads:[~2021-12-31 4:30 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-30 22:43 using finalizers Tomas Hlavaty
2021-12-31 2:46 ` LdBeth
2021-12-31 3:29 ` Stefan Monnier
2021-12-31 3:36 ` Stefan Monnier
2021-12-31 4:30 ` LdBeth [this message]
2021-12-31 4:43 ` LdBeth
2021-12-31 6:28 ` Tomas Hlavaty
2021-12-31 10:59 ` LdBeth
2021-12-31 11:18 ` Tomas Hlavaty
2021-12-31 11:41 ` LdBeth
2021-12-31 12:01 ` Tomas Hlavaty
2022-01-01 17:00 ` Stefan Monnier
2022-01-01 20:25 ` Tomas Hlavaty
2022-01-01 20:47 ` Stefan Monnier
2022-01-01 22:55 ` Tomas Hlavaty
2022-01-01 23:18 ` Stefan Monnier
2022-01-01 23:47 ` Tomas Hlavaty
2022-01-01 23:26 ` Tomas Hlavaty
2021-12-31 7:50 ` Eli Zaretskii
2021-12-31 9:31 ` Tomas Hlavaty
2021-12-31 12:27 ` Eli Zaretskii
2022-01-01 17:58 ` Tomas Hlavaty
2022-01-01 18:20 ` Eli Zaretskii
2022-01-01 20:55 ` Stefan Monnier
2022-01-01 23:05 ` Tomas Hlavaty
2022-01-01 23:21 ` Stefan Monnier
2021-12-31 14:23 ` Rudolf Schlatte
2021-12-31 16:21 ` Stefan Monnier
2022-01-01 17:37 ` Tomas Hlavaty
2022-01-01 22:36 ` Tomas Hlavaty
2022-01-02 6:54 ` Eli Zaretskii
2022-01-02 7:53 ` Tomas Hlavaty
2022-01-02 8:33 ` Eli Zaretskii
2022-01-02 13:10 ` Tomas Hlavaty
2022-01-02 14:42 ` Eli Zaretskii
2022-01-02 15:16 ` Eli Zaretskii
2022-01-02 17:18 ` Tomas Hlavaty
2022-01-02 18:11 ` Rudolf Schlatte
2022-01-03 0:37 ` Tomas Hlavaty
2022-01-04 3:08 ` Richard Stallman
2021-12-31 14:39 ` LdBeth
2022-01-01 17:59 ` Tomas Hlavaty
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