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

Previous Next

Full log

Message #23 received at 57907 <at> debbugs.gnu.org (full text, mbox):

From: Philip Kaludercic <philipk <at> posteo.net>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 57907 <at> debbugs.gnu.org
Subject: Re: bug#57907: 29.0.50; Using keywords with cl-loop
Date: Sun, 18 Sep 2022 12:46:18 +0000

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> Philip Kaludercic <philipk <at> posteo.net> writes:
>
>> Why would this be necessary?  I am not saying that `cl-loop' should be
>> converted into a proper keyword-macro, just that each `:foo' in a
>> loop-keyword position ought to be interpreted as `foo'.
>
> You said that cl-loop would be more comfortable if "it doesn't have to
> feel like you are using a whole new language, but instead these are
> just keyword arguments to an unusual function call".
>
> I'm pointing out that this is wrong -- they are not keyword arguments,
> and if you think that they are, you're going to be using it wrong.
>
> In other words, it is a whole new language, not just keyword arguments.

I phrased that clumsily -- while it is a new language, it doesn't always
have to feel like one.  E.g. the repeat-collect example I gave before.
If you *can* use keywords, you *can* make some cl-loop invocations
appear to be a macro or a function call with keyword-arguments.

But of course this wouldn't be the case, as the macro should stay
backwards compatible.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.