c++-mode and multiline comments

c++-mode and multiline comments

[Michal]

Hallo Group Readers!

pressing M-j in the following position:
int main() {   /*
                * <CURSOR HERE>


makes emacs start new line inented to the comment above and "* " added.

but, when:
int main() {   /*<CURSOR HERE>


and I press M-j, then cursor goes to new line but does not add "* ".
Is it possible to configure multiline comments to do so?

best regards
Michal

Re: c++-mode and multiline comments

[Alan Mackenzie]

Hi, Michal!

On Tue, Jun 23, 2009 at 06:39:39PM +0200, Michal wrote:

> Hallo Group Readers!

> pressing M-j in the following position:
> int main() {   /*
>                 * <CURSOR HERE>


> makes emacs start new line inented to the comment above and "* " added.

Yes.  It looks at the _second_ line, and copies the "comment prefix" onto
the new line

> but, when:
> int main() {   /*<CURSOR HERE>


> and I press M-j, then cursor goes to new line but does not add "* ".

Yes, because there's no second line to take the comment prefix from.

> Is it possible to configure multiline comments to do so?

Yes.  Set the style variable `c-block-comment-prefix' to "* ".  This
variable is precisely for what you want, and it is documented on page
"Custom Filling and Breaking" of the CC Mode manual (which you surely
have).

For all the fancy ways you can set a style variable, see page "Custom
Filling and Breaking"; if you can't be bothered reading this, the
simplest way to set the variable is to simply set it early on in your
.emacs, say with

    (setq c-block-comment-prefix "* ")

.

All the best!

> best regards
> Michal

-- 
Alan Mackenzie (Nuremberg, Germany).

Re: c++-mode and multiline comments

[Michal]

Hallo Alan!

Thank You for Your answer.
I looked at help to 'c-block-comment-prefix' and it is written there:

  This variable is not used for C++ line
  style comments.

should I worry about it somehow?

best regards,
Michal

Re: c++-mode and multiline comments

[Alan Mackenzie]

Hi, Michal!

On Wed, Jun 24, 2009 at 01:35:38PM +0200, Michal wrote:

> Hallo Alan!

> Thank You for Your answer.
> I looked at help to 'c-block-comment-prefix' and it is written there:

>   This variable is not used for C++ line
>   style comments.

> should I worry about it somehow?

No, not at all!  Line comments all start off with "//" and end at EOL, so
there's no need for anything like `c-block-comment-prefix'.

> best regards,
> Michal

-- 
Alan Mackenzie (Nuremberg, Germany).

Re: c++-mode and multiline comments

[Michal]

Alan Mackenzie <acm@muc.de> writes:

> No, not at all!  Line comments all start off with "//" and end at EOL, so
> there's no need for anything like `c-block-comment-prefix'.

thank You

best regards,
Michal