Re: Local Variables question: c-file-style and c-doc-comment-style

[Kevin Rodgers]

Daniel Rubin wrote:
> (I'm new here, so first of all: Best greetings to everyone!)

Welcome!

> I have a problem concerning local variables in files (set by a
> "Local Variables:" block at the end of a file).
>
> Here's what I'm trying to achieve:
>
> In C++ files, I'd like to set the indentation style (stroustrup),
> apply some customizations (indentation inside namespace blocks),
> and turn on a specific documentation comment style (javadoc).  I
> currently do it like this:
>
> > // Local Variables:
> > // c-file-style:"stroustrup"
> > // c-file-offsets:((innamespace . 0))
> > // c-doc-comment-style:javadoc
> > // End:
>
>
> Setting the indentation style and changing the indentation inside
> namespaces works fine, but the doc-comment style is NOT set.
>
> Looking at variable c-doc-comment-style, it tells me that it's
> local within that buffer and having a setting different from the
> global default:
>
> > c-doc-comment-style's value is ((java-mode . javadoc)
> >  (pike-mode . autodoc))
> >
> > Local in buffer EadesLinSmythProgression.hpp; global value is 
> > ((c++-mode . javadoc)
> >  (java-mode . javadoc)
> >  (pike-mode . autodoc))
>
>
> The documentation on c-file-style says that having a non-zero
> value for this variable automatically makes all style variables
> local, so I guess that's the problem.
>
> How do I manage to set the doc-comment style?
>
> Defining an own style (in my personal Emacs config) including that
> setting is not an option, as other people (with other config
> files) should be able to work with these files without nuking the
> indentation.
>
> emacs-version: 21.4.1
> mode: c++-mode (CC Mode version 5.30.9) (Semantic version 2.0pre3)
> OS: Linux (Fedora Core 4)

I don't know if any of this applies to Emacs 21.4, but the CC Mode
manual distributed with Emacs 22.0.92 says the following:

,----
|      The default value for `c-doc-comment-style' is
|      `((java-mode . javadoc) (pike-mode . autodoc) (c-mode . gtkdoc))'.
|
|      Note that CC Mode uses this variable to set other variables that
|      handle fontification etc.  That's done at mode initialization or
|      when you switch to a style which sets this variable.  Thus, if you
|      change it in some other way, e.g. interactively in a CC Mode
|      buffer, you will need to do `M-x java-mode' (or whatever mode
|      you're currently using) to reinitialize.
|
|      Note also that when CC Mode starts up, the other variables are
|      modified before the mode hooks are run.  If you change this
|      variable in a mode hook, you'll have to call
|      `c-setup-doc-comment-style' afterwards to redo that work.
`----

These are just guesses, but you could try forcing a call to
c-setup-doc-comment-style in the Local Variables block (after you
set c-doc-comment-style):

        eval: (c-setup-doc-comment-style)

or via the mode hook (in your ~/.emacs):

        (add-hook 'c++-mode-hook 'c-setup-doc-comment-style)

--
Kevin Rodgers
Denver, Colorado, USA