GNU bug report logs - #16811
24.3.50; [ruby-mode] Implicit hash indentation bug

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Bozhidar Batsov <bozhidar <at> batsov.com>
Subject: bug#16811: closed (Re: bug#16811: 24.3.50; [ruby-mode] Implicit
 hash indentation bug)
Date: Sun, 23 Feb 2014 05:56:04 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#16811: 24.3.50; [ruby-mode] Implicit hash indentation bug

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 16811 <at> debbugs.gnu.org.

-- 
16811: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16811
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 16811-done <at> debbugs.gnu.org, Bozhidar Batsov <bozhidar <at> batsov.com>
Subject: Re: bug#16811: 24.3.50; [ruby-mode] Implicit hash indentation bug
Date: Sun, 23 Feb 2014 07:55:37 +0200

On 20.02.2014 16:11, Stefan Monnier wrote:
>> The problem seems to be that (let (smie--parent) (smie-indent--parent))
>
> Which does little more than (smie-backward-sexp 'halfsexp) in this case.

Yes.

>> called between "=>" and "{" doesn't stop at "=>", but goes straight to
>> the parent "{".
>
> Which seems correct.

Maybe according to the current grammar. But not if we want expressions 
after `=>' to have consistent additional indentation. Which I'm now 
thinking we probably don't, since otherwise, if it works right,

     {
       'HashSyntax' => {
         'EnforcedStyle'   => 'ruby19',
         'SupportedStyles' => %w(ruby19 hash_rockets)
       },

would turn into

     {
       'HashSyntax' => {
           'EnforcedStyle'   => 'ruby19',
           'SupportedStyles' => %w(ruby19 hash_rockets)
         },

and that doesn't look good. So indenting the left and right sides of 
`=>' to the same level is probably the way to go.

Changed in revision 116534, fixing this bug.

Thanks for the questions!

> This said, I don't understand why
>
>     {
>       'HashSyntax' => {
>         'EnforcedStyle'   => 'ruby19',
>         'SupportedStyles' => %w(ruby19 hash_rockets)
>       },
>       'SpaceAroundOperators' => { 'Enabled' => true }
>     }
>
> is indented differently from
>
>     {'HashSyntax' => {
>                       'EnforcedStyle'   => 'ruby19',
>                       'SupportedStyles' => %w(ruby19 hash_rockets)
>                     },
>      'SpaceAroundOperators' => {
>        'Enabled' => true }}
>
> It seems like "it jumps back to { instead of =>" is not the full explanation.

That's because we always insert an implicit semicolon after { at eol, 
and that's because it's hard to distinguish between a curly that's 
opening a hash and a curly than opens a curly block.

And we need those after block-opening curlies, otherwise some token on 
the first line of the block might consider the curly as its parent, 
align to it, and block-opening curlies themselves align to the beginning 
of the statement.

So

it("is too!") {
  bar
    .qux
}

turns into

it("is too!") {
  bar
  .qux
}

[Message part 3 (message/rfc822, inline)]

From: Bozhidar Batsov <bozhidar <at> batsov.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; [ruby-mode] Implicit hash indentation bug
Date: Wed, 19 Feb 2014 19:44:25 +0200

This nested hash literal is indented correctly:

{
  'HashSyntax' => {
    'EnforcedStyle'   => 'ruby19',
    'SupportedStyles' => %w(ruby19 hash_rockets)
  },
  'SpaceAroundOperators' => { 'Enabled' => true }
}

This one, however, is not:

method('HashSyntax' => {
                        'EnforcedStyle'   => 'ruby19',
                        'SupportedStyles' => %w(ruby19 hash_rockets)
                      },
       'SpaceAroundOperators' => { 'Enabled' => true })

Should be:

method('HashSyntax' => {
         'EnforcedStyle'   => 'ruby19',
         'SupportedStyles' => %w(ruby19 hash_rockets)
       },
       'SpaceAroundOperators' => { 'Enabled' => true })


The fact that the hash is implicit (lacking {}) seems to mess with the
indentation logic.



In GNU Emacs 24.3.50.1 (x86_64-apple-darwin13.0.0, NS apple-appkit-1265.00)
 of 2014-01-27 on Bozhidars-MacBook-Pro.local
Windowing system distributor `Apple', version 10.3.1265
Configured using:
 `configure --prefix=/usr/local/Cellar/emacs/HEAD --without-dbus
 --enable-locallisppath=/usr/local/share/emacs/site-lisp
 --infodir=/usr/local/Cellar/emacs/HEAD/share/info/emacs
 --without-gnutls --with-ns --disable-ns-self-contained'

Important settings:
  locale-coding-system: utf-8-unix

Major mode: Ruby

Minor modes in effect:
  ruby-tools-mode: t
  inf-ruby-minor-mode: t
  diff-auto-refine-mode: t
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  erc-list-mode: t
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  erc-autojoin-mode: t
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  erc-pcomplete-mode: t
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  erc-button-mode: t
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  erc-stamp-mode: t
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  erc-noncommands-mode: t
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  erc-readonly-mode: t
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  which-function-mode: t
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  shell-dirtrack-mode: t
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  tooltip-mode: t
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  auto-encryption-mode: t
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  column-number-mode: t
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  transient-mark-mode: t

Recent input:
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M-p C-a M-( g e t - b u f f e r - p r o c e s s SPC
<return> C-p C-p C-= M-w <down-mouse-1> <mouse-1> C-x
b t e s t . r b C-g s-r t e s t . r b <return> <return>
<return> C-x b r b C-s C-s C-s <return> C-p C-p C-p
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p
C-p C-p C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f
C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f
C-f C-f C-SPC C-n C-n C-n C-n C-n C-e C-p C-e C-b M-w
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C-p C-p C-p C-p C-a C-SPC C-n C-n C-n C-n C-e M-w C-x
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<tab> C-n <tab> C-e C-p C-p C-p C-p C-p C-p C-p C-p
C-p C-p C-p C-p C-p C-a M-x r e p o r t <return>

Recent messages:
Wrote /Users/bozhidar/projects/test.rb
Mark set [2 times]
Indenting region...done
Saving file /Users/bozhidar/projects/test.rb...
Wrote /Users/bozhidar/projects/test.rb
Mark set [2 times]
Indenting region...done
Align the elements of a hash literal if they span more than one line.
Beginning of buffer
Literal {

Load-path shadows:
/Users/bozhidar/.emacs.d/elpa/tabulated-list-20120406.2251/tabulated-list hides /usr/local/Cellar/emacs/HEAD/share/emacs/24.3.50/lisp/emacs-lisp/tabulated-list

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