From: Philipp Stephani <p.stephani2@gmail.com>
To: Drew Adams <drew.adams@oracle.com>, npostavs@users.sourceforge.net
Cc: 25627@debbugs.gnu.org
Subject: bug#25627: 25.1; `help-make-xrefs' loads `cl-extra.el' now
Date: Tue, 07 Feb 2017 22:29:36 +0000 [thread overview]
Message-ID: <CAArVCkQBuraSJ3LG0Oad2_DAgod4Uao05DscFyzMOrgAnXMgMw@mail.gmail.com> (raw)
In-Reply-To: <5f457952-82ca-4a77-8061-1b2e366fcfb2@default>
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Drew Adams <drew.adams@oracle.com> schrieb am Di., 7. Feb. 2017 um
03:23 Uhr:
> > > I thought that the point of creating `cl-lib.el' was to give people a
> > > library of the most-used CL constructs and still let them avoid loading
> > > all of `cl.el'. If we are, in effect, loading `cl-extra.el' now nearly
> > > by default then what's the point of separating out `cl-lib.el'?
> >
> > AFAIK, the point of cl-lib is to have the CL constructs in a separate
> > namespace, so that loading cl-lib doesn't change the semantics of
> > existing code that might not expect it (unlike cl.el).
>
> What part of `cl.el' changes the semantics of existing [non-cl.el]
> code?
Loading cl.el modifies the observable behavior of dolist. For example,
insert the following into /tmp/dolist.el:
;;; -*- lexical-binding: t; -*-
(eval-when-compile (require 'cl-lib))
(message "Without cl.el")
(cl-dolist (i '(1 2 3))
(dolist (j '(a b c))
(message "i = %s, j = %s" i j)
(when (= i 2) (cl-return))))
(message "\nWith cl.el")
(eval-when-compile (require 'cl))
(cl-dolist (i '(1 2 3))
(dolist (j '(a b c))
(message "i = %s, j = %s" i j)
(when (= i 2) (cl-return))))
And then run:
$ emacs -Q -batch -l /tmp/dolist.el
Without cl.el
i = 1, j = a
i = 1, j = b
i = 1, j = c
i = 2, j = a
With cl.el
i = 1, j = a
i = 1, j = b
i = 1, j = c
i = 2, j = a
i = 3, j = a
i = 3, j = b
i = 3, j = c
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next prev parent reply other threads:[~2017-02-07 22:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-05 18:44 bug#25627: 25.1; `help-make-xrefs' loads `cl-extra.el' now Drew Adams
2017-02-05 19:24 ` Drew Adams
2017-02-07 0:58 ` npostavs
2017-02-07 2:21 ` Drew Adams
2017-02-07 13:30 ` Michael Heerdegen
2017-02-07 16:13 ` Drew Adams
2017-02-07 17:19 ` Michael Heerdegen
2017-02-07 22:29 ` Philipp Stephani [this message]
2017-02-07 23:00 ` Drew Adams
2017-02-07 23:08 ` Noam Postavsky
2017-02-08 0:18 ` Drew Adams
2017-02-08 1:56 ` npostavs
2017-02-08 1:59 ` Drew Adams
2017-02-08 4:57 ` npostavs
2017-02-08 5:40 ` Drew Adams
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