GNU bug report logs - #31641
26.1; iter-do variable not left unused warning

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Package: emacs;

Reported by: Christopher Wellons <wellons <at> nullprogram.com>

Date: Tue, 29 May 2018 13:13:01 UTC

Severity: minor

Tags: confirmed, fixed

Found in version 26.1

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Christopher Wellons <wellons <at> nullprogram.com>, Daniel Colascione <dancol <at> dancol.org>, 31641 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> gmail.com>
Subject: bug#31641: 26.1; iter-do variable not left unused warning
Date: Fri, 05 Feb 2021 09:53:10 +0100

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

> FWIW, I find the above expansion to provide somewhat "dirty" semantics
> in the sense that
>
>     (let ((funs '()))
>       (iter-do (n i) (push (lambda () n) funs))
>       funs)
>
> will return a list of functions which all return the same value (the
> last `n`).
>
> You can clean up this semantics and the warning at the same time by
> using an expansion like:

If I'm reading that correctly, that does seem like more obvious
semantics, but is it too late to change this now?  I'm not sure how much
generator.el is used in the wild yet...

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
This bug report was last modified 4 years and 111 days ago.

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