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Re: Hungry delete for C, C++ and Java?


From: William Payne
Subject: Re: Hungry delete for C, C++ and Java?
Date: Thu, 22 Apr 2004 19:55:19 +0200

"William Payne" <address@hidden> wrote in message
news:address@hidden
>
> "William Payne" <address@hidden> wrote in message
> news:address@hidden
> >
> > "Alan Mackenzie" <address@hidden> wrote in message
> > news:address@hidden
> > > William Payne <address@hidden> wrote on Wed, 21
> Apr
> > > 2004 00:27:06 +0200:
> > >
> > > >> > .... and I was wondering how I turn on hungry delete per default
> for
> > > >> > C, C++ and Java?
> > >
> > > >> In an appropriate hook function (probably on c-mode-common-hook)
> > include:
> > >
> > > >> (c-toggle-hungry-state 1)
> > >
> > > >> [, and as a matter of interest, C-c C-d will execute
> > > >> `c-toggle-hungry-state' interactively].  <backspace> and C-d (but
not
> > > >> <del>) then do hungry deletion.  It looks as thought the fine
manual
> > > >> could do with some clarification on this point.
> > >
> > > > Thanks for the reply, Alan. My .emacs file is as follows, where
should
> > > > I put (c-toggle-hungry-state 1)? Under (defun my-c++-mode ()
> > > > (interactive) and (defun my-java-mode () (interactive) ?
> > >
> > > > My .emacs file was created years and years ago by someone else, I
wish
> I
> > > > understood it better...I am guessing it could be cleaned-up/improved
> > alot.
> > >
> > > > Fyi, I am using CC-Mode 5.30.8.
> > >
> > > A stable released version without bugs. (hah! :-)
> > >
> > > OK, a few comments on your .emacs file:
> > >
> > > >   '("\\.pike$"   . my-c++-mode)    ; element of auto-mode-alist
> > >
> > > There is actually a Pike Mode within CC Mode.  If that's the same
> > > language that your files.pike are, it would be better than c++-mode.
> >
> > Thanks for noticing this. I have removed this entry completely.
> >
> > > Also, you're using C++ Mode for C files.  Also not _so_ bad, but not
> > > quite optimal.
> > >
> >
> > Yes, I guess I should change that. First I will have to convert all my
c++
> > header files to end in .hpp instead of .h. I also have to fix the
> > indentation in some cases, it's not behaving as I want it to behave.
> >
> > > > (defun my-java-mode () (interactive)
> > > >   (java-mode)
> > > >   (require 'jdok)
> > > >   (c-toggle-hungry-state 1)   ;
<====================================
> > > >   (setq c-basic-offset 3) ; Indent three columns.
> > > >   (setq c-offsets-alist
> > >
> > > It looks like you've already got c-toggle-hungry-state turned on,
here.
> > > Does it work?  Have you inserted this line here in the last day or
two,
> > > perhaps?  It ought to work.
> > >
> >
> > I added that after your first reply and, yes, it works. =)
> >
> > > If it now works and you're happy about it, that's great, and just
ignore
> > > what follows.
> > >
> > >
> #########################################################################
> > >
> > > However, if you're interested in getting to know Emacs and CC Mode a
bit
> > > better, the way you've got CC Mode configured is highly unusual, and
> > > suggests the person who wrote the .emacs didn't fully understand the
way
> > > Emacs works.
> > >
> > > Your setup for C++ Mode looks like this in outline:
> > >
> > > (defun my-c++-mode ()
> > >   (c++-mode)
> > >   (williams-customizations))
> > >
> > > This compels you to add entries to auto-mode-alist (this is the list
> > > which tells Emacs which mode to use for a filename).  Normally C++
Mode
> > > is configured by using "hooks" - you give c++-mode a list of functions
> > > you want to get called whenever c++-mode runs.  You then get the
> > > customizations you want without need to have functions like
my-c++-mode.
> > > You could reformulate your code like this:
> > >
> > > (defun williams-c++-hook ()
> > >   (williams-customizations))
> > > (add-hook 'c++-mode-hook 'williams-c++-hook)
> > >
> > > That way, you could get rid of all these entries to auto-mode-alist.
> > > Customizations which are common to C, C++, Java, Pike, (such as the
> > > call of c-toggle-hungry-state) you need only write once, in
> > > c-mode-common-hook, like this:
> > >
> > > (defun williams-common-hook ()
> > >   (c-toggle-hungry-state 1)
> > >   (other-customizations))
> > > (add-hook 'c-mode-common-hook 'williams-common-hook)
> > >
> > > This is extensively described on the page "Hooks" in the CC Mode
manual,
> > > and the page "Sample .emacs File" would also be of interest.
> > >
> > > > / WP
> > >
> >
> > I am very interested in cleaning up my .emacs-file and understanding
emacs
> > and cc-mode better. I am not quite sure I follow you on the hooks
(having
> > done zero lisp coding), but I will try to understand it and incorporate
> your
> > suggestions.
> > > -- 
> > > Alan Mackenzie (Munich, Germany)
> > > Email: address@hidden; to decode, wherever there is a repeated letter
> > > (like "aa"), remove half of them (leaving, say, "a").
> > >
> >
> > / William Payne
> >
> >
>
> Ok, I have added a C++ hook now and it seems to work but why doesn't give
it
> me the same indentation rules as it does for a c++-file? I don't mind it,
I
> just don't understand it...
>
> / WP
>
>

Lol, nevermind it wasn't using the C++ indentation rules. I know have two
hooks, one for C and one for C++. I am trying to remove the syntactic
symbols from the C hook that have no meaning in C code. Next I will add a
Java hook I guess, but I haven't been using Java anything at all for the
past two years.

I still have some indentation tweaks to do (when writing a preprocessor
macro in c or c++, I want it to align to column zero).

Also, can I output a string telling me which hook I am using?

/ WP




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