From: Drew Adams <drew.adams@oracle.com>
To: 53014@debbugs.gnu.org
Subject: bug#53014: 27.2; `cl-macs.el' no longer provides `cl-macs'
Date: Tue, 4 Jan 2022 21:14:08 +0000 [thread overview]
Message-ID: <SJ0PR10MB54886584F0E883D8E6D6D1EFF34A9@SJ0PR10MB5488.namprd10.prod.outlook.com> (raw)
Presumably a design bug, i.e., intentional.
Until Emacs 27, code could use this to load the macros defining things
like `cl-case' (which has l o n g been aliased to `case', and which
should even be in Emacs Lisp itself, as is `push'):
(eval-when-compile (require 'cl-macs))
Emacs 27 breaks that. Now, if you need only CL macros, you need to
require `cl-lib.el' instead. So any library that needs something like
`case', and needs to support both Emacs 27+ and older Emacs versions,
needs to jump through a hoop such as this (or another, using
`load-library'):
(eval-when-compile
(require (if (< emacs-major-version 27) 'cl-macs 'cl-lib)))
Gratuitous bother. Or was there some real need for introducing the
incompatibility?
In GNU Emacs 27.2 (build 1, x86_64-w64-mingw32)
of 2021-03-26 built on CIRROCUMULUS
Repository revision: deef5efafb70f4b171265b896505b92b6eef24e6
Repository branch: HEAD
Windowing system distributor 'Microsoft Corp.', version 10.0.19042
System Description: Microsoft Windows 10 Pro (v10.0.2009.19042.1348)
next reply other threads:[~2022-01-04 21:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-04 21:14 Drew Adams [this message]
2022-01-05 1:28 ` bug#53014: 27.2; `cl-macs.el' no longer provides `cl-macs' Glenn Morris
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