Can't insert curly brace for string interpolation in ruby-mode

Can't insert curly brace for string interpolation in ruby-mode

[Andrew Pennebaker]

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Ruby uses the syntax "... #{expression}..." for string interpolation. But
when I press left curly brace, Emacs says "Symbol's value as variable is
void: last-command-char".

I C-h k {, and saw that { and } are bound to ruby-electric-brace. This
function appears to be malfunctioning.

As a workaround, I M-x fundamental-mode, typed a literal { and }, then M-x
ruby-mode. Doing this repeatedly became a hassle, so I added a temporary
hook to my .emacs:

(add-hook 'ruby-mode-hook
          (lambda ()
            (define-key ruby-mode-map "{" nil)
            (define-key ruby-mode-map "}" nil)))

Could someone take a look at ruby-electric-brace to determine the exact
issue?

-- 
Cheers,

Andrew Pennebaker
www.yellosoft.us

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Bob Proulx]

Andrew Pennebaker wrote:
> Ruby uses the syntax "... #{expression}..." for string interpolation. But
> when I press left curly brace, Emacs says "Symbol's value as variable is
> void: last-command-char".

This works fine for me in emacs 24.2.1.  And with 23.4.1 too.  What
version are you using?

> I C-h k {, and saw that { and } are bound to ruby-electric-brace.

Same here.

> This function appears to be malfunctioning.

You didn't say so the obligatory response is, "Have you tried it with -Q?"

  emacs -Q

Works for me.

Bob

Re: Can't insert curly brace for string interpolation in ruby-mode

[Andrew Pennebaker]

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Good idea!

Unfortunately I haven't been able to emacs -Q in Mac due to my poor setup.
I can't even pass the option!

Could someone suggest a better way to do this?

$ which emacs
/usr/bin/emacs

$ cat `which emacs`
#!/bin/sh
open -a /Applications/Emacs.app/Contents/MacOS/Emacs "$@"

My goal is to be able to launch "emacs <dir/file>" from Terminal.app, such
that Emacs doesn't steal control over the terminal while it runs.
Ordinarly, one would use "emacs <dir/file> &", but I like to close the
terminal, and I don't want Emacs to die with it. So I use "open -a..."

The problem with this arrangement is that this doesn't allow command line
options to be sent to Emacs. "open" provides --args, but I haven't been
able to use it properly.


On Fri, Apr 5, 2013 at 7:52 PM, Bob Proulx <bob@proulx.com> wrote:

> Andrew Pennebaker wrote:
> > Ruby uses the syntax "... #{expression}..." for string interpolation. But
> > when I press left curly brace, Emacs says "Symbol's value as variable is
> > void: last-command-char".
>
> This works fine for me in emacs 24.2.1.  And with 23.4.1 too.  What
> version are you using?
>
> > I C-h k {, and saw that { and } are bound to ruby-electric-brace.
>
> Same here.
>
> > This function appears to be malfunctioning.
>
> You didn't say so the obligatory response is, "Have you tried it with -Q?"
>
>   emacs -Q
>
> Works for me.
>
> Bob
>
>


-- 
Cheers,

Andrew Pennebaker
www.yellosoft.us

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Steven Degutis]

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First of all I highly recommend installing Cocoa Emacs from homebrew. Look
here for how to install it properly:
https://github.com/sdegutis/using-emacs#installing-emacs-properly

Secondly, you pass args to open via --args (look at `man open`). So it
would be `open -a emacs --args -Q` if you want to launch Cocoa Emacs with -Q

-Steven


On Fri, Apr 5, 2013 at 7:43 PM, Andrew Pennebaker <
andrew.pennebaker@gmail.com> wrote:

> Good idea!
>
> Unfortunately I haven't been able to emacs -Q in Mac due to my poor setup.
> I can't even pass the option!
>
> Could someone suggest a better way to do this?
>
> $ which emacs
> /usr/bin/emacs
>
> $ cat `which emacs`
> #!/bin/sh
> open -a /Applications/Emacs.app/Contents/MacOS/Emacs "$@"
>
> My goal is to be able to launch "emacs <dir/file>" from Terminal.app, such
> that Emacs doesn't steal control over the terminal while it runs.
> Ordinarly, one would use "emacs <dir/file> &", but I like to close the
> terminal, and I don't want Emacs to die with it. So I use "open -a..."
>
> The problem with this arrangement is that this doesn't allow command line
> options to be sent to Emacs. "open" provides --args, but I haven't been
> able to use it properly.
>
>
> On Fri, Apr 5, 2013 at 7:52 PM, Bob Proulx <bob@proulx.com> wrote:
>
>> Andrew Pennebaker wrote:
>> > Ruby uses the syntax "... #{expression}..." for string interpolation.
>> But
>> > when I press left curly brace, Emacs says "Symbol's value as variable is
>> > void: last-command-char".
>>
>> This works fine for me in emacs 24.2.1.  And with 23.4.1 too.  What
>> version are you using?
>>
>> > I C-h k {, and saw that { and } are bound to ruby-electric-brace.
>>
>> Same here.
>>
>> > This function appears to be malfunctioning.
>>
>> You didn't say so the obligatory response is, "Have you tried it with -Q?"
>>
>>   emacs -Q
>>
>> Works for me.
>>
>> Bob
>>
>>
>
>
> --
> Cheers,
>
> Andrew Pennebaker
> www.yellosoft.us
>

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Steven Degutis]

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No, `open` works fine for this. Look again at the man page. It doesn't
expect a binary like you were passing it (Contents/MacOS/Emacs). Instead
you just pass it the name of an app bundle. The command I sent to you in
the last email works perfectly.

-Steven


On Fri, Apr 5, 2013 at 8:42 PM, Andrew Pennebaker <
andrew.pennebaker@gmail.com> wrote:

> Thank you.
>
> I did use the man page, and I did try --args, but open complained. Could
> you suggest a better shell script?
> On Apr 5, 2013 9:07 PM, "Steven Degutis" <sbdegutis@gmail.com> wrote:
>
>> First of all I highly recommend installing Cocoa Emacs from homebrew.
>> Look here for how to install it properly:
>> https://github.com/sdegutis/using-emacs#installing-emacs-properly
>>
>> Secondly, you pass args to open via --args (look at `man open`). So it
>> would be `open -a emacs --args -Q` if you want to launch Cocoa Emacs with -Q
>>
>> -Steven
>>
>>
>> On Fri, Apr 5, 2013 at 7:43 PM, Andrew Pennebaker <
>> andrew.pennebaker@gmail.com> wrote:
>>
>>> Good idea!
>>>
>>> Unfortunately I haven't been able to emacs -Q in Mac due to my poor
>>> setup. I can't even pass the option!
>>>
>>> Could someone suggest a better way to do this?
>>>
>>> $ which emacs
>>> /usr/bin/emacs
>>>
>>> $ cat `which emacs`
>>> #!/bin/sh
>>> open -a /Applications/Emacs.app/Contents/MacOS/Emacs "$@"
>>>
>>> My goal is to be able to launch "emacs <dir/file>" from Terminal.app,
>>> such that Emacs doesn't steal control over the terminal while it runs.
>>> Ordinarly, one would use "emacs <dir/file> &", but I like to close the
>>> terminal, and I don't want Emacs to die with it. So I use "open -a..."
>>>
>>> The problem with this arrangement is that this doesn't allow command
>>> line options to be sent to Emacs. "open" provides --args, but I haven't
>>> been able to use it properly.
>>>
>>>
>>> On Fri, Apr 5, 2013 at 7:52 PM, Bob Proulx <bob@proulx.com> wrote:
>>>
>>>> Andrew Pennebaker wrote:
>>>> > Ruby uses the syntax "... #{expression}..." for string interpolation.
>>>> But
>>>> > when I press left curly brace, Emacs says "Symbol's value as variable
>>>> is
>>>> > void: last-command-char".
>>>>
>>>> This works fine for me in emacs 24.2.1.  And with 23.4.1 too.  What
>>>> version are you using?
>>>>
>>>> > I C-h k {, and saw that { and } are bound to ruby-electric-brace.
>>>>
>>>> Same here.
>>>>
>>>> > This function appears to be malfunctioning.
>>>>
>>>> You didn't say so the obligatory response is, "Have you tried it with
>>>> -Q?"
>>>>
>>>>   emacs -Q
>>>>
>>>> Works for me.
>>>>
>>>> Bob
>>>>
>>>>
>>>
>>>
>>> --
>>> Cheers,
>>>
>>> Andrew Pennebaker
>>> www.yellosoft.us
>>>
>>
>>

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Steven Degutis]

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(1) Yes, that's true. That's a limitation of emacs, not the open command.
Do `emacs --help`
(2) Please do reply-all instead of just replying to me, so more people have
an opportunity to answer you.
(3) None of this is related to curly braces in ruby-mode, i.e. the topic of
this thread. Let's stay on topic.

-Steven


On Fri, Apr 5, 2013 at 10:12 PM, Andrew Pennebaker <
andrew.pennebaker@gmail.com> wrote:

> When I try open -a emacs --args ${1+"$@"}, I have to choose either open a
> file, or provide a command line argument. I can't do both.
>
>
> On Fri, Apr 5, 2013 at 10:57 PM, Andrew Pennebaker <
> andrew.pennebaker@gmail.com> wrote:
>
>> I'd like an emacs.sh script that I could pass command line arguments to.
>> I wouldn't want to manually type "open -a emacs" each time.
>>
>> This almost completely does the job:
>>
>> open -a emacs $1 --args ${2+"$@"}
>>
>> But it only supplies files for Emacs to load. It doesn't support command
>> line arguments like -Q or -nw.
>>
>>
>> On Fri, Apr 5, 2013 at 9:45 PM, Steven Degutis <sbdegutis@gmail.com>wrote:
>>
>>> No, `open` works fine for this. Look again at the man page. It doesn't
>>> expect a binary like you were passing it (Contents/MacOS/Emacs). Instead
>>> you just pass it the name of an app bundle. The command I sent to you in
>>> the last email works perfectly.
>>>
>>> -Steven
>>>
>>>
>>> On Fri, Apr 5, 2013 at 8:42 PM, Andrew Pennebaker <
>>> andrew.pennebaker@gmail.com> wrote:
>>>
>>>> Thank you.
>>>>
>>>> I did use the man page, and I did try --args, but open complained.
>>>> Could you suggest a better shell script?
>>>> On Apr 5, 2013 9:07 PM, "Steven Degutis" <sbdegutis@gmail.com> wrote:
>>>>
>>>>> First of all I highly recommend installing Cocoa Emacs from homebrew.
>>>>> Look here for how to install it properly:
>>>>> https://github.com/sdegutis/using-emacs#installing-emacs-properly
>>>>>
>>>>> Secondly, you pass args to open via --args (look at `man open`). So it
>>>>> would be `open -a emacs --args -Q` if you want to launch Cocoa Emacs with -Q
>>>>>
>>>>> -Steven
>>>>>
>>>>>
>>>>> On Fri, Apr 5, 2013 at 7:43 PM, Andrew Pennebaker <
>>>>> andrew.pennebaker@gmail.com> wrote:
>>>>>
>>>>>> Good idea!
>>>>>>
>>>>>> Unfortunately I haven't been able to emacs -Q in Mac due to my poor
>>>>>> setup. I can't even pass the option!
>>>>>>
>>>>>> Could someone suggest a better way to do this?
>>>>>>
>>>>>> $ which emacs
>>>>>> /usr/bin/emacs
>>>>>>
>>>>>> $ cat `which emacs`
>>>>>> #!/bin/sh
>>>>>> open -a /Applications/Emacs.app/Contents/MacOS/Emacs "$@"
>>>>>>
>>>>>> My goal is to be able to launch "emacs <dir/file>" from Terminal.app,
>>>>>> such that Emacs doesn't steal control over the terminal while it runs.
>>>>>> Ordinarly, one would use "emacs <dir/file> &", but I like to close the
>>>>>> terminal, and I don't want Emacs to die with it. So I use "open -a..."
>>>>>>
>>>>>> The problem with this arrangement is that this doesn't allow command
>>>>>> line options to be sent to Emacs. "open" provides --args, but I haven't
>>>>>> been able to use it properly.
>>>>>>
>>>>>>
>>>>>> On Fri, Apr 5, 2013 at 7:52 PM, Bob Proulx <bob@proulx.com> wrote:
>>>>>>
>>>>>>> Andrew Pennebaker wrote:
>>>>>>> > Ruby uses the syntax "... #{expression}..." for string
>>>>>>> interpolation. But
>>>>>>> > when I press left curly brace, Emacs says "Symbol's value as
>>>>>>> variable is
>>>>>>> > void: last-command-char".
>>>>>>>
>>>>>>> This works fine for me in emacs 24.2.1.  And with 23.4.1 too.  What
>>>>>>> version are you using?
>>>>>>>
>>>>>>> > I C-h k {, and saw that { and } are bound to ruby-electric-brace.
>>>>>>>
>>>>>>> Same here.
>>>>>>>
>>>>>>> > This function appears to be malfunctioning.
>>>>>>>
>>>>>>> You didn't say so the obligatory response is, "Have you tried it
>>>>>>> with -Q?"
>>>>>>>
>>>>>>>   emacs -Q
>>>>>>>
>>>>>>> Works for me.
>>>>>>>
>>>>>>> Bob
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Cheers,
>>>>>>
>>>>>> Andrew Pennebaker
>>>>>> www.yellosoft.us
>>>>>>
>>>>>
>>>>>
>>>
>>
>>
>> --
>> Cheers,
>>
>> Andrew Pennebaker
>> www.yellosoft.us
>>
>
>
>
> --
> Cheers,
>
> Andrew Pennebaker
> www.yellosoft.us
>

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Bob Proulx]

Steven Degutis wrote:
> Andrew Pennebaker wrote:
> > When I try open -a emacs --args ${1+"$@"}, I have to choose either open a
> > file, or provide a command line argument. I can't do both.
>
> (1) Yes, that's true. That's a limitation of emacs, not the open command.
> Do `emacs --help`

You should be able to do 'emacs -Q filename.rb' however.

I see you using the old idiom ${1+"$@"}.  That is fine.  That will
work everywhere.  But unless you are working on Solaris then that
idiom can be shorted to simply "$@" without checking $1 first.  All
modern shells treat "$@" correctly now and it is required by POSIX.

You have been focusing on trying to get the "open" to work.  But you
could just for the experiment try emacs in a terminal window and get
the test done.

  emacs -nw -Q

Just ignore the who "open" problem for the moment and just test
whether -Q causes your curly brace problem to go away.  Because if
it does then you now the problem is in your emacs customization in
your ~/.emacs or wherever you are locating it.

Bob

Re: Can't insert curly brace for string interpolation in ruby-mode

[Andrew Pennebaker]

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With help from #macdev, I was finally able to write a more sophisticated
Emacs shell script. If you download
https://github.com/mcandre/dotfiles/blob/master/emacs.sh and soft link it
as /usr/bin/emacs, it allows you to launch emacs from a terminal as a GUI
app, or a pure command line ncurses app, by properly responding to the
various emacs command line options.

I'm fairly demanding of my programs, so I hassled a few communities to help
the shell script meet a lot of constraints. The dependencies are Emacs for
Mac OS X, bash, and Mac OS X, though conceivably the script could be ported
to Aquamacs or Homebrew Emacs.

The emacs shell script will work with a file to open, without a file to
open, with and without other command line arguments such as -Q, --version,
and --help, and files and command line flags can be passed to emacs in
arbitrary order (${1+"$@"}).

In GUI mode, Emacs will release control from the shell; you can keep
entering commands in the terminal that Emacs was launched from without
having to background the process with Control+Z. Emacs does not die with
the shell, if you happen to close the terminal (nohup).

Emacs will open in the foreground, not behind the terminal (osascript).

Emacs will not interrupt your terminal experience with stdout messages (>
/dev/null).

If you do use the -nw flag, emacs will open inside the terminal in curses
mode.



On Fri, Apr 5, 2013 at 11:21 PM, Bob Proulx <bob@proulx.com> wrote:

> Steven Degutis wrote:
> > Andrew Pennebaker wrote:
> > > When I try open -a emacs --args ${1+"$@"}, I have to choose either
> open a
> > > file, or provide a command line argument. I can't do both.
> >
> > (1) Yes, that's true. That's a limitation of emacs, not the open command.
> > Do `emacs --help`
>
> You should be able to do 'emacs -Q filename.rb' however.
>
> I see you using the old idiom ${1+"$@"}.  That is fine.  That will
> work everywhere.  But unless you are working on Solaris then that
> idiom can be shorted to simply "$@" without checking $1 first.  All
> modern shells treat "$@" correctly now and it is required by POSIX.
>
> You have been focusing on trying to get the "open" to work.  But you
> could just for the experiment try emacs in a terminal window and get
> the test done.
>
>   emacs -nw -Q
>
> Just ignore the who "open" problem for the moment and just test
> whether -Q causes your curly brace problem to go away.  Because if
> it does then you now the problem is in your emacs customization in
> your ~/.emacs or wherever you are locating it.
>
> Bob
>



-- 
Cheers,

Andrew Pennebaker
www.yellosoft.us

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Steven Degutis]

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Your first two paragraphs reminded me of something:
http://media.tumblr.com/tumblr_lo3fy1mswH1qanohb.jpg

-Steven


On Fri, Apr 5, 2013 at 11:32 PM, Andrew Pennebaker <
andrew.pennebaker@gmail.com> wrote:

> With help from #macdev, I was finally able to write a more sophisticated
> Emacs shell script. If you download
> https://github.com/mcandre/dotfiles/blob/master/emacs.sh and soft link it
> as /usr/bin/emacs, it allows you to launch emacs from a terminal as a GUI
> app, or a pure command line ncurses app, by properly responding to the
> various emacs command line options.
>
> I'm fairly demanding of my programs, so I hassled a few communities to
> help the shell script meet a lot of constraints. The dependencies are Emacs
> for Mac OS X, bash, and Mac OS X, though conceivably the script could be
> ported to Aquamacs or Homebrew Emacs.
>
> The emacs shell script will work with a file to open, without a file to
> open, with and without other command line arguments such as -Q, --version,
> and --help, and files and command line flags can be passed to emacs in
> arbitrary order (${1+"$@"}).
>
> In GUI mode, Emacs will release control from the shell; you can keep
> entering commands in the terminal that Emacs was launched from without
> having to background the process with Control+Z. Emacs does not die with
> the shell, if you happen to close the terminal (nohup).
>
> Emacs will open in the foreground, not behind the terminal (osascript).
>
> Emacs will not interrupt your terminal experience with stdout messages (>
> /dev/null).
>
> If you do use the -nw flag, emacs will open inside the terminal in curses
> mode.
>
>
>
> On Fri, Apr 5, 2013 at 11:21 PM, Bob Proulx <bob@proulx.com> wrote:
>
>> Steven Degutis wrote:
>> > Andrew Pennebaker wrote:
>> > > When I try open -a emacs --args ${1+"$@"}, I have to choose either
>> open a
>> > > file, or provide a command line argument. I can't do both.
>> >
>> > (1) Yes, that's true. That's a limitation of emacs, not the open
>> command.
>> > Do `emacs --help`
>>
>> You should be able to do 'emacs -Q filename.rb' however.
>>
>> I see you using the old idiom ${1+"$@"}.  That is fine.  That will
>> work everywhere.  But unless you are working on Solaris then that
>> idiom can be shorted to simply "$@" without checking $1 first.  All
>> modern shells treat "$@" correctly now and it is required by POSIX.
>>
>> You have been focusing on trying to get the "open" to work.  But you
>> could just for the experiment try emacs in a terminal window and get
>> the test done.
>>
>>   emacs -nw -Q
>>
>> Just ignore the who "open" problem for the moment and just test
>> whether -Q causes your curly brace problem to go away.  Because if
>> it does then you now the problem is in your emacs customization in
>> your ~/.emacs or wherever you are locating it.
>>
>> Bob
>>
>
>
>
> --
> Cheers,
>
> Andrew Pennebaker
> www.yellosoft.us
>

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Re: Can't insert curly brace for string interpolation in ruby-mode

[Zhen Sun]

Andrew Pennebaker <andrew.pennebaker@gmail.com> writes:

> Ruby uses the syntax "... #{expression}..." for string interpolation. But
> when I press left curly brace, Emacs says "Symbol's value as variable is
> void: last-command-char".
>
> I C-h k {, and saw that { and } are bound to ruby-electric-brace. This
> function appears to be malfunctioning.

I had the same problem days ago. Fixed by installing ruby-electric from
ELPA.

Zhen