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From: Andrea Corallo <acorallo@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: 71120@debbugs.gnu.org,
	"Mattias Engdegård" <mattias.engdegard@gmail.com>,
	"Philip Kaludercic" <philipk@posteo.net>,
	"Philippe Schnoebelen" <phs@lmf.cnrs.fr>
Subject: bug#71120: 29.3; buglet in cl-loop
Date: Thu, 30 May 2024 11:41:50 -0400	[thread overview]
Message-ID: <yp1h6efqpc1.fsf@fencepost.gnu.org> (raw)
In-Reply-To: <jwvzfs7we9r.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Thu, 30 May 2024 10:51:19 -0400")

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

>>>> 	(cl-loop for i from 1 to 100 collect (random 6))
> [...]
>>>> 	(cl-loop for _i from 1 to 100 collect (random 6))
>>> Thus I don't think there's anything we really need to do here, do you?
>> I, for one, think the nicest option is the one SBCL (and I guess other
>> CL implementations) are using, that is to have 'i' 'ignorable', the
>> problem is that we don't support this at language level.
>
> I don't quite see how "ignorable" comes into play here.
>
> In the first case above, the var is "not used", has a "normal"
> name, and we get no warning.  Does SBCL do the same or does it emit
> a warning?

It does not emit a warning

> In the second case, the var is "not used", has an "I'm not used" name,
> and we do get a warning.  Does SBCL even support "I'm not used" names?

It does not.

In Elisp a variable can be either normal or _* (not used).

In CL a variable other than normal can be 'ignore' which correspond to
our _* or 'ignorable'.  This last AFAIU stands for might or might not be
used but don't emit warnings.

It's no big deal but I think 'ignorable' is useful for macros expanding
code with variables that might or not be used by the user like in this.

  Andrea





  reply	other threads:[~2024-05-30 15:41 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-22  8:43 bug#71120: 29.3; buglet in cl-loop Philippe Schnoebelen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-29 20:47 ` Philip Kaludercic
2024-05-29 21:33   ` Andrea Corallo
2024-05-29 21:49     ` Andrea Corallo
2024-05-30  1:45     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-30  9:25   ` Mattias Engdegård
2024-05-30 13:14     ` Andrea Corallo
2024-05-30 14:51       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-30 15:41         ` Andrea Corallo [this message]
2024-05-30 15:45           ` Mattias Engdegård
2024-05-30 17:15             ` Andrea Corallo
2024-05-30 17:18               ` Mattias Engdegård
2024-05-30 17:42                 ` Andrea Corallo
2024-05-31  4:30                   ` Gerd Möllmann
2024-05-31  8:29                   ` Mattias Engdegård
2024-06-03 15:24                     ` Andrea Corallo
2024-06-03 15:32                       ` Mattias Engdegård
2024-06-03 15:42                         ` Andrea Corallo
2024-06-03 16:24                           ` Mattias Engdegård

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