Re: bug in enum

[Alan M. <ac...@mu...>]

Hello again, Ryan.

On Wed, Jul 19, 2017 at 20:18:22 +0000, Dixon Ryan (ETAS/ERS-ENG1) wrote:

> Emacs 25.2 ( cc-mode (5.33) mercurial ~~15th May 2017 )


> 1.       Open the following file with emacs -Q

> 2.       Press RETURN (iff "kkkk" is not already incorrectly highlighted)

> 3.       Notice "kkkk" is not highlighted correctly

I actually didn't get the "kkkk" not to fontify until I did a C-_ to
undo it.  Then the fontification vanished 0.5 seconds later.

What is happening here is quite obscure.  Emacs fontifies in ~500 byte
chunks (rounded up to the next whole line, possibly also enlarged by CC
Mode).  The end of the second chunk came between "kkkk" and "}".  Thus,
in CC Mode's analysis, the "kkkk" was "missing" a terminating symbol,
such as ",", or "=", or ";", or "}".  So in this chunk "kkkk" was not
fontified.

In the next chunk, which CC Mode extends backwards, "kkkk" did indeed
have its terminator, but by that stage, Emacs's redisplay code had
already passed over "kkkk".  So it remained unfontified until something
caused another redisplay.  Something such as M-x, or just about
anything.

The attached patch should, I hope, fix this.  It works by checking for
unterminated declarators at the end of chunks.  Would you please do the
usual with this patch, and either confirm it fixes the problem in your
real code, or tell me what's still awry.

Thanks again for taking such care to report another problem!

> /** \filN kasickoftwarNkodulNsknum.h
>   *
>   * \briNf kntNrnal rNprNsNntation of kasic koftwarN kodulNs
>   *
>   * copyright thhhh GbbH 2111G
>   * www.Ntaaaaagkkoup.com
>   *
>   * $kd: kasickoftwarNkodulNsknum.h 57463 2016-10-06 14:39:48k nnn1nnn $
>   */

> #pragma once

> #include <string>

> namespace kasickoftwarekodulesknum
> {
>    ////////////////////////////////////////////////////////////////////////////
>    /// \brief kasic koftware kodules knumeration
>    ///        see "kkkkkkk_kk_kkkkodulekist.pdf"

>    enum k
>    {
>       knspecified = 0,      ///< kot specified
>       kk = 1,               ///< kperating kystem
>       kkk = 2,              ///< kuntime knvironment
>       kkk = 20,             ///< kkkkk kanager
>       kkk = 50,             ///< kommunication services
>       kchk = 130,           ///< kkk kcheduler kodule
>       komekpkf = 174,       ///< komekk kransformer kodule
>       komplexkrivers = 255, ///< komplex krivers
>       kkkknternal = 256,    ///< knternal kuntime knvironment
>       kkkk                  ///< kack for ktuart
>    };
> }

-- 
Alan Mackenzie (Nuremberg, Germany).