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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Thierry Volpiatto <thierry.volpiatto@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: false warnings when compiling with lexical-binding and cl-lib.
Date: Thu, 21 Nov 2013 20:19:43 -0500	[thread overview]
Message-ID: <jwv7gc1dyju.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <8761rl6ael.fsf@gmail.com> (Thierry Volpiatto's message of "Thu,  21 Nov 2013 16:29:22 +0100")

> here a sample file containing a function using loop:

> --8<---------------cut here---------------start------------->8---
> ;;; test.el --- test loop -*- lexical-binding: t -*-

> (require 'cl-lib)

> (defun test-with (l)
>   (cl-loop with lst
>            for i in l
>            unless (member i lst)
>            collect i into lst
>            finally return lst))
> --8<---------------cut here---------------end--------------->8---

> When compiling this file I have a warning about unused arg `lst'.
> Is this wanted ?

No, it's not wanted.  But noone so far as been able to come up with
a patch to fix it (the code to fix is the cl-loop macro: look at the
macro-expanded code to see the unused `lst').


        Stefan



  reply	other threads:[~2013-11-22  1:19 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-21 15:29 false warnings when compiling with lexical-binding and cl-lib Thierry Volpiatto
2013-11-22  1:19 ` Stefan Monnier [this message]
2013-11-22  5:33   ` Thierry Volpiatto
2013-11-22  7:48   ` Thierry Volpiatto
2013-11-23  6:13   ` Thierry Volpiatto
2013-11-23 13:51     ` Stefan Monnier
2013-11-23 15:53       ` Thierry Volpiatto
2013-11-23 16:24         ` Thierry Volpiatto
2013-11-24 18:08           ` Stefan Monnier

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