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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: electric-indent-mode: abolition of `newline' function is not the Right Thing.
Date: Mon, 14 Oct 2013 08:56:25 -0400	[thread overview]
Message-ID: <jwvk3hgpp09.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20131013172841.GA2498@acm.acm> (Alan Mackenzie's message of "Sun, 13 Oct 2013 17:28:41 +0000")

> And people calling `newline' do not simply want a \n.  They want
> abbreviations to be processed, they want auto-fill to be run, trailing
> space to be removed from otherwise blank lines, and so on.  What they
> _don't_ want is indentation inserted on the new line.

Not sure who is your "they".  In my experience, what I've seen users
want is "auto-indentation" and by that they mean that the text should be
kept indented when they hit RET and a few other keys.
E.g. a question I've seen many times is

  So I tried this Emacs thingy which claims to do indentation for me,
  but all my text stays at the left-margin.  What am I doing wrong.

and the answer I generally see given is:

  You want to bind RET to newline-and-indent.

Are these the majority, users?  I don't know.  But so far, you're the
only person who's complained about ?\n being in the default value of
electric-indent-chars, so I see no evidence that your preference in this
regard is representative.

> Please take this indent-newline functionality out of
> e-i-post-s-i-function (or let me do it).

Very easy: remove ?\n from electric-indent-chars.
IOW (setq-default electric-indent-chars nil) should do that for you.

> Incidentally, each call of e-i-post-s-i-function creates a new marker,
> bound to the let variable `before'.  This is not set to point nowhere
> before `before' becomes unbound.  I think it probably should.

Let's see if/when this leads to a concrete performance problem, and at
that point we'll see how to fix it.  Making a marker point nowhere is an
annoyance and is itself a costly operation (O(N) for N markers), so
I don't much like using the workaround you suggest.


        Stefan



  reply	other threads:[~2013-10-14 12:56 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-13 10:13 electric-indent-mode: abolition of `newline' function is not the Right Thing Alan Mackenzie
2013-10-13 13:23 ` Stefan Monnier
2013-10-13 14:09   ` Alan Mackenzie
2013-10-13 16:22     ` Stefan Monnier
2013-10-13 17:28       ` Alan Mackenzie
2013-10-14 12:56         ` Stefan Monnier [this message]
2013-10-16 18:46           ` Alan Mackenzie
2013-10-15 18:28         ` martin rudalics
2013-10-16 17:12           ` Alan Mackenzie
2013-10-16 17:59             ` Stefan Monnier
2013-10-16 18:58               ` Alan Mackenzie
2013-10-16 20:55                 ` chad
2013-10-16 21:07                   ` Daniel Colascione
2013-10-18 16:51                   ` Alan Mackenzie
2013-10-16 23:22               ` Stephen J. Turnbull
2013-10-16 18:34             ` martin rudalics
2013-10-16 19:26               ` Default behaviour of RET Alan Mackenzie
2013-10-16 19:47                 ` Eli Zaretskii
2013-10-16 23:17                 ` Stephen J. Turnbull
2013-10-17  0:47                   ` Stefan Monnier
2013-10-18 17:03                     ` Alan Mackenzie
2013-10-18 19:52                       ` Stefan Monnier
2013-10-18 20:45                         ` Alan Mackenzie
2013-10-19  1:59                           ` Stefan Monnier
2013-10-19 10:58                             ` Alan Mackenzie
2013-10-19 15:07                               ` Drew Adams
2013-10-20 14:55                                 ` Alan Mackenzie
2013-10-20 22:26                                   ` Richard Stallman
2013-10-21  2:38                                     ` Eli Zaretskii
2013-10-19 22:20                               ` Stefan Monnier
2013-10-20 15:00                                 ` Alan Mackenzie
2013-10-18 16:57                   ` Alan Mackenzie
2013-10-13 20:00 ` electric-indent-mode: abolition of `newline' function is not the Right Thing Matthias Meulien
2013-10-14 13:21   ` Stefan Monnier
2013-10-14 13:31     ` Matthias Meulien
2013-10-14 16:46       ` Stefan Monnier
2013-10-15 15:54         ` Davis Herring
2013-10-15 20:03         ` Matthias Meulien
2013-10-16  2:44           ` Stefan Monnier

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