From: Christopher Wellons <wellons@nullprogram.com>
To: 31641@debbugs.gnu.org
Subject: bug#31641: 26.1; iter-do variable not left unused warning
Date: Tue, 29 May 2018 09:12:30 -0400 [thread overview]
Message-ID: <20180529131230.kijx2bkcvcqsyhgg@nullprogram.com> (raw)
When byte-compiling an iter-do form with a variable intended to be left
unused, the compiler emits a false warning:
;;; -*- lexical-binding: t; -*-
(require 'generator)
(iter-do (_ i))
;; -> "Warning: variable ‘_’ not left unused"
Giving the variable a name has the opposite effect, though it's not
a false warning in this case:
(iter-do (v i))
;; -> "Unused lexical variable ‘v’"
This issue does not occur with similar, long-established forms:
;;; -*- lexical-binding: t; -*-
(dolist (_ '(a b c)))
(dotimes (_ 10))
;; -> no warnings
next reply other threads:[~2018-05-29 13:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-29 13:12 Christopher Wellons [this message]
2018-05-29 22:13 ` bug#31641: 26.1; iter-do variable not left unused warning Noam Postavsky
2021-02-04 10:05 ` Lars Ingebrigtsen
2021-02-04 16:36 ` Stefan Monnier
2021-02-05 8:53 ` Lars Ingebrigtsen
2021-02-05 15:03 ` Stefan Monnier
2021-02-06 10:31 ` Lars Ingebrigtsen
2021-02-05 17:12 ` Basil L. Contovounesios
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