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bug#30393: 24.4; cperl-mode: indentation failure
From: |
Alan Mackenzie |
Subject: |
bug#30393: 24.4; cperl-mode: indentation failure |
Date: |
Wed, 14 Feb 2018 21:00:22 +0000 |
User-agent: |
Mutt/1.7.2 (2016-11-26) |
Hello, Eli.
On Sun, Feb 11, 2018 at 18:16:00 +0200, Eli Zaretskii wrote:
> > Date: Sun, 11 Feb 2018 12:49:30 +0000
> > Cc: dgutov@yandex.ru, npostavs@users.sourceforge.net,
> > monnier@IRO.UMontreal.CA, 30393@debbugs.gnu.org
> > From: Alan Mackenzie <acm@muc.de>
> > > This text is not needed. The original text, which you deleted,
> > > described how to avoid a real problem; if that problem no longer
> > > exists, we should just delete that text. If that problem does exist
> > > in some modes, we should leave that text as it was, with a better
> > > description of what modes are still subject to these problems.
> > > But describing something that is no longer done by Emacs is just waste
> > > of paper.
> > Perhaps the proposed fix was somewhat prolix ("long winded"). But, in a
> > sense, we're providing a new feature, the ability to write syntactically
> > correct parens. If we don't mention this, people won't notice.
> > Occasionally somebody will remember the previous restriction, try to
> > look it up in the manual, and end up puzzled.
> > How about a compromise, and replacing those two long paragraphs with a
> > simple sentence such as:
> > From Emacs 27.1, you can write opening parens at column zero without
> > problems.
> > > Overall, I must say I'm confused regarding the purpose of this patch.
> > > What does it try to accomplish?
> > To note that the documented previous restrictions on parens in column 0
> > no longer hold.
> The right place for such stuff is in NEWS.
> > I suppose we really want to mark this part of the manual as obsolete,
> > but we've got no mechanism for doing this. Besides,
> > open-paren-in-column-0-is-defun-start still has _some_ functionality.
> The variable should have some minimal description with a note that
> using it nowadays is seldom needed. That should be enough to drive
> your point home, I think.
In accordance with that, then, I propose the following as the complete
emacs manual page "Left Margin Convention":
26.2.1 Left Margin Convention
-----------------------------
Many programming-language modes have traditionally assumed that any
opening delimiter found at the left margin is the start of a top-level
definition, or defun. So, by default, commands which seek the beginning
of a defun accept such a delimiter as signifying that position.
If you want to override this convention, you can do so by setting the
user option `open-paren-in-column-0-is-defun-start' to `nil'. If this
option is set to `t' (the default), commands seeking the start of a
defun will stop at opening parentheses or braces at column zero. When
it is `nil', defuns are found by searching for parens or braces at the
outermost level. Since low-level Emacs routines no longer depend on
this convention, you usually won't need to change
`open-paren-in-column-0-is-defun-start' from its default.
--
Alan Mackenzie (Nuremberg, Germany).
- bug#30393: 24.4; cperl-mode: indentation failure, paulusm, 2018/02/08
- bug#30393: 24.4; cperl-mode: indentation failure, Noam Postavsky, 2018/02/08
- Message not available
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/09
- bug#30393: 24.4; cperl-mode: indentation failure, Noam Postavsky, 2018/02/09
- bug#30393: 24.4; cperl-mode: indentation failure, Dmitry Gutov, 2018/02/10
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/10
- bug#30393: 24.4; cperl-mode: indentation failure, Eli Zaretskii, 2018/02/10
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/11
- bug#30393: 24.4; cperl-mode: indentation failure, Eli Zaretskii, 2018/02/11
- bug#30393: 24.4; cperl-mode: indentation failure,
Alan Mackenzie <=
- bug#30393: 24.4; cperl-mode: indentation failure, Eli Zaretskii, 2018/02/15
- bug#30393: 24.4; cperl-mode: indentation failure, Dmitry Gutov, 2018/02/16
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/16
- bug#30393: 24.4; cperl-mode: indentation failure, Dmitry Gutov, 2018/02/16
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/17
- bug#30393: 24.4; cperl-mode: indentation failure, Stefan Monnier, 2018/02/10
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/11
- bug#30393: 24.4; cperl-mode: indentation failure, Stefan Monnier, 2018/02/11
- bug#30393: 24.4; cperl-mode: indentation failure, Alan Mackenzie, 2018/02/12
- bug#30393: 24.4; cperl-mode: indentation failure, Stefan Monnier, 2018/02/12