From: "Mattias Engdegård" <mattias.engdegard@gmail.com>
To: Philip Kaludercic <philipk@posteo.net>
Cc: 71120@debbugs.gnu.org, Stefan Monnier <monnier@iro.umontreal.ca>,
Philippe Schnoebelen <phs@lmf.cnrs.fr>
Subject: bug#71120: 29.3; buglet in cl-loop
Date: Thu, 30 May 2024 11:25:46 +0200 [thread overview]
Message-ID: <4ED83CF1-C697-46DF-99D2-56432A1E3B44@gmail.com> (raw)
In-Reply-To: <87cyp4wdj7.fsf@posteo.net>
Philippe Schnoebelen <phs@lmf.cnrs.fr> writes:
> When I need a list of 100 random dice throws I write
>
> (cl-loop for i from 1 to 100 collect (random 6))
>
> It compiles just fine.
>
> If instead I use
>
> (cl-loop for _i from 1 to 100 collect (random 6))
>
> then I get a compilation warning:
>
> foo.el:1:18: Warning: variable ‘_i’ not left unused
Quite unfair that you have no a priori way of knowing whether your variable name is actually the one that `cl-loop` uses for iteration or just one bound for each iteration (as in `dotimes`).
A sloppy reading of Common Lisp's `loop` spec, which we don't need to follow since this isn't CL but we'd be fools to deviate too far from without a good reason, didn't tell me anything.
In particular nothing about whether the user is allowed to alter the variable in order to change the iteration. For example, what should
(cl-loop for i from 1 to 100
when (= i 3) do (setq i 98)
collect i)
return? Perhaps better not touch that.
Thus I don't think there's anything we really need to do here, do you?
next prev parent reply other threads:[~2024-05-30 9:25 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 [this message]
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
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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