From: Philipp Stephani <p.stephani2@gmail.com>
To: tomas@tuxteam.de
Cc: help-gnu-emacs <help-gnu-emacs@gnu.org>
Subject: Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?
Date: Fri, 8 Jan 2021 14:31:14 +0100 [thread overview]
Message-ID: <CAArVCkQtMBfz+mspvoDvwFaSjZhw+SN4sGvYw-kF7gZx_a4Y_g@mail.gmail.com> (raw)
In-Reply-To: <20210108131343.GC21347@tuxteam.de>
Am Fr., 8. Jan. 2021 um 14:14 Uhr schrieb <tomas@tuxteam.de>:
> Fixing the macro definition is a bit more attractive (e.g.
> it could try to decide whether RESULT depends on i and
> not generate that let-binding if not), but I can't decide
> right now whether that involves the halting problem or not.
Certainly not, since that's what the byte compiler is doing. It's just
a lexical walk through the code after macroexpansion.
(require 'cconv)
(let ((env '((VAR nil nil nil nil))))
(cconv-analyze-form (macroexpand-all RESULT-FORM t) env)
(cadr (assq VAR env)))
Should return t if VAR is used in RESULT-FORM.
But then, I don't know whether that's worth it or not. Alternatively,
you could add an (ignore VAR) to the macro expansion of the result
form so that cconv treats the variable as used.
next prev parent reply other threads:[~2021-01-08 13:31 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 7:58 How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Jean Louis
2021-01-07 10:03 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 11:00 ` Jean Louis
2021-01-07 10:07 ` Philipp Stephani
2021-01-07 10:07 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 11:06 ` Jean Louis
2021-01-07 11:23 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 11:12 ` Jean Louis
2021-01-07 11:33 ` Philipp Stephani
2021-01-07 11:35 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 16:05 ` FW: " Drew Adams
2021-01-08 1:04 ` Jean Louis
2021-01-08 2:26 ` Stefan Monnier
2021-01-08 2:39 ` Jean Louis
2021-01-08 2:45 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 2:50 ` Jean Louis
2021-01-08 3:36 ` Stefan Monnier
2021-01-08 2:52 ` Jean Louis
2021-01-08 3:08 ` Drew Adams
2021-01-08 3:31 ` Stefan Monnier
2021-01-08 2:19 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 0:58 ` Jean Louis
2021-01-08 1:08 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-07 15:38 ` Stefan Monnier
2021-01-08 1:03 ` Jean Louis
2021-01-08 2:21 ` Stefan Monnier
2021-01-08 2:21 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 2:38 ` Jean Louis
2021-01-08 3:39 ` Stefan Monnier
2021-01-08 4:09 ` Jean Louis
2021-01-08 5:13 ` Stefan Monnier
2021-01-08 5:38 ` Robert Thorpe
2021-01-08 6:22 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 7:10 ` Stefan Monnier
2021-01-09 18:57 ` Tomas Hlavaty
2021-01-09 19:01 ` Stefan Monnier
2021-01-10 9:20 ` Tomas Hlavaty
2021-01-10 14:52 ` Stefan Monnier
2021-01-11 22:23 ` Tomas Hlavaty
2021-01-08 5:40 ` Jean Louis
2021-01-08 7:14 ` Stefan Monnier
2021-01-08 8:28 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 11:07 ` tomas
2021-01-08 12:38 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 13:13 ` tomas
2021-01-08 13:31 ` Philipp Stephani [this message]
2021-01-08 13:35 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 13:47 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 13:15 ` Philipp Stephani
2021-01-08 13:31 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 14:03 ` tomas
2021-01-09 7:55 ` Jean Louis
2021-01-09 13:15 ` Leo Butler
2021-01-09 14:02 ` Philipp Stephani
2021-01-09 23:06 ` Leo Butler
2021-01-09 23:14 ` Stefan Monnier
2021-01-11 12:53 ` Leo Butler
2021-01-11 15:03 ` Stefan Monnier
2021-01-08 3:03 ` Drew Adams
2021-01-08 4:40 ` Stefan Monnier
2021-01-08 17:22 ` Drew Adams
2021-01-08 4:48 ` How to get plist properties list? Jean Louis
2021-01-08 5:20 ` Stefan Monnier
2021-01-08 5:46 ` Jean Louis
2021-01-08 6:50 ` Stefan Monnier
2021-01-09 7:54 ` Jean Louis
2021-01-09 9:27 ` tomas
2021-01-09 10:41 ` Jean Louis
2021-01-09 16:57 ` Stefan Monnier
2021-01-12 20:32 ` Jean Louis
2021-01-12 21:23 ` Stefan Monnier
2021-01-08 0:57 ` How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Jean Louis
2021-01-07 15:35 ` Stefan Monnier
2021-01-08 1:02 ` Jean Louis
2021-01-08 1:12 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-01-08 2:08 ` Jean Louis
2021-01-08 2:26 ` Emanuel Berg via Users list for the GNU Emacs text editor
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