GNU bug report logs - #57907
29.0.50; Using keywords with cl-loop

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From: Philip Kaludercic <philipk <at> posteo.net>
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: 57907 <at> debbugs.gnu.org
Subject: bug#57907: 29.0.50; Using keywords with cl-loop
Date: Sun, 18 Sep 2022 12:52:14 +0000

Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:

> From: Philip Kaludercic @ 2022-09-18 12:03 UTC (permalink / raw)
>   To: 57907
>
>
>> In Common Lisp the following to are equivalent
>>
>>    (loop :repeat 5 :collect t)
>>
>> and
>>
>>    (loop repeat 5 collect t)
>>
>> as keywords are shared among all packages.
>
> Actually, that's not the reason why Common Lisp accepts that.  The
> reason is that the loop macro only looks at symbol names.  In Common
> Lisp
>
> (symbol-name :a) => "A"
> (symbol-package :a) => #<PACKAGE "KEYWORD">
> (symbol-name foo:a) => "A"
> (symbol-package foo:a) => #<PACKAGE "FOO">

Interesting, I did not know this.  But the point remains that Common
Lisp's loop accepts both the symbol "a" from the "COMMON-LISP" package
and from the "KEYWORD" package, right?

> while in Emacs
>
> (symbol-name :a) => ":a"
>
> Wouldn't it be nice if Emacs finally decided to have Common Lisp packages?

Yeah, if only we could convince Emacs to do that ;)

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