From: "zhangjg" <jinguozhang@qq.com>
To: "Andreas Schwab" <schwab@linux-m68k.org>
Cc: 26635 <26635@debbugs.gnu.org>
Subject: bug#26635: 回复： bug#26635: 25.1; elisp docs bug
Date: Mon, 24 Apr 2017 18:31:17 +0800 [thread overview]
Message-ID: <tencent_6004E9216AA497E927F4703A@qq.com> (raw)
In-Reply-To: <87shkydt3b.fsf@linux-m68k.org>
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Like the fellow code:
(= 1 1 t) ; error
(= 1 2 t) ; nil
t is a symbol, (= 1 1 t) signal a error, that is what we expect.
But in the second form there is no error, because "=" get the
result before to eval the third argument "t".
So "=" not to eval all arguments, that is a "sepecial form" activation.
------------------ 原始邮件 ------------------
发件人: "Andreas Schwab";<schwab@linux-m68k.org>;
发送时间: 2017年4月24日(星期一) 下午5:59
收件人: "zhangjg"<jinguozhang@qq.com>;
抄送: "26635"<26635@debbugs.gnu.org>;
主题: Re: bug#26635: 25.1; elisp docs bug
On Apr 24 2017, "zhangjg" <jinguozhang@qq.com> wrote:
> In session "3.4 Comparison of Numbers", "=" is a set to a "function" but, in fact it a "special forms".
Why do you think `=' is a special form?
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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next prev parent reply other threads:[~2017-04-24 10:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-24 3:35 bug#26635: 25.1; elisp docs bug zhangjg
2017-04-24 9:59 ` Andreas Schwab
2017-04-24 10:31 ` zhangjg [this message]
2017-04-24 10:50 ` bug#26635: 回复： " Andreas Schwab
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