From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: Rationalising c[ad]\{2,5\}r.
Date: Fri, 13 Mar 2015 19:00:20 -0400 [thread overview]
Message-ID: <jwvlhj0pmom.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20150313213655.GB3972@acm.fritz.box> (Alan Mackenzie's message of "Fri, 13 Mar 2015 21:36:55 +0000")
> I don't know how many of them require other bits of CL. But the point
> is that CL is not loaded by default, so any use of cXXXr in standard
> files is awkward. I'm thinking in particular about my new fix-re.el
> here.
You can use cl-lib freely in most files. The only exception is for
preloaded files which can only (eval-when-compiler (require 'cl-lib))
(with some further exceptions for the earliest files, for obvious
reasons of bootstrap limitations).
So you can (eval-when-compiler (require 'cl-lib)) in fix-re.el without
any hesitation. IOW no need to add anything to subr.el for that.
This said, fix-re.el seems to be the quintessential example of abuse of
heaps of car/cdr which make the code unreadable.
> OK, fair enough. But unless we're talking about doing cXXXr needlessly
> in a tight loop, it's hardly going to make a noticeable difference.
Agreed.
> 1. All c[ad]\{3,4\}r are now declared in subr.el, generated from macros.
I'm still not convinced it's a good idea to add those to subr.el.
> 2. Each of these has a cl-cXXXr as an alias, declared as obsolete as
> from 25.1.
These aliases and obsolescence settings would belong in cl-lib.el.
> 3. caar, cadr, cdar, and cddr are now declared as defuns (changed from
> defsubsts).
> 4. All the cXXr, including caar, etc., use the compiler macro
> `compiler-macro-cXXr' (renamed by removing "cl-" from the name).
Please keep a "--" in the name to indicate it's an internal function.
For lack of a good prefix, I'd use "internal--".
Stefan
next prev parent reply other threads:[~2015-03-13 23:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-11 21:43 Rationalising c[ad]\{2,5\}r Alan Mackenzie
2015-03-11 22:00 ` Drew Adams
2015-03-11 22:54 ` Artur Malabarba
2015-03-12 1:51 ` Drew Adams
2015-03-12 9:54 ` Artur Malabarba
2015-03-12 14:01 ` Drew Adams
2015-03-12 4:34 ` Stephen J. Turnbull
2015-03-12 10:15 ` Artur Malabarba
2015-03-12 10:30 ` Alan Mackenzie
2015-03-12 14:03 ` Drew Adams
2015-03-11 22:15 ` Thien-Thi Nguyen
2015-03-11 23:00 ` Alan Mackenzie
2015-03-11 23:36 ` Thien-Thi Nguyen
2015-03-12 1:35 ` Samuel W. Flint
2015-03-12 0:52 ` Artur Malabarba
2015-03-12 8:56 ` Alan Mackenzie
2015-03-12 10:15 ` Artur Malabarba
2015-03-12 13:53 ` Stefan Monnier
2015-03-13 16:41 ` Alan Mackenzie
2015-03-13 16:47 ` Drew Adams
2015-03-13 20:38 ` Stefan Monnier
2015-03-13 21:36 ` Alan Mackenzie
2015-03-13 23:00 ` Stefan Monnier [this message]
2015-04-05 13:00 ` Alan Mackenzie
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