GNU bug report logs - #25154
25.1; Bindings in cl-letf are in reverse order

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Package: emacs;

Reported by: Alex <agrambot <at> gmail.com>

Date: Fri, 9 Dec 2016 23:55:02 UTC

Severity: minor

Tags: notabug

Found in version 25.1

Done: Philipp Stephani <p.stephani2 <at> gmail.com>

Bug is archived. No further changes may be made.

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From: Tino Calancha <tino.calancha <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 25154 <at> debbugs.gnu.org, Alex <agrambot <at> gmail.com>, tino.calancha <at> gmail.com
Subject: bug#25154: 25.1; Bindings in cl-letf are in reverse order
Date: Sat, 10 Dec 2016 16:43:02 +0900

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Alex <agrambot <at> gmail.com>
>> Date: Fri, 09 Dec 2016 17:36:15 -0600
>> 
>> Compare the following:
>> 
>> (let ((x 5)
>>       (x 6))
>>   (+ x 10))
>> 
>> => 16
>> 
>> (cl-letf ((x 5)
>>           (x 6))
>>   (+ x 10))
>> 
>> => 15
>
> Isn't it true that the order of evaluation in a 'let' is unspecified?
> If you want a particular order, use 'let*'.
Right, the order of evaluation in a let is up to the implementation.  A program
should not rely on such details.
The same statement should apply to cl-letf.
This bug report was last modified 8 years and 150 days ago.

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