help with font locking

help with font locking

[Mark P]

I'm trying to edit my .emacs file so that in c++-mode a frequently used 
user-defined type "Coord" is highlighted like any built-in type (int, 
bool, etc.)  I searched around for a while but found only very limited 
information.  The best I could produce was the following:

;; customize font-locking
(font-lock-add-keywords
'c++-mode
'(("\\<\\(Coord\\)" 1 font-lock-type-face)
   ) )

This sort of works.  In a statement like:

Coord fcn (Coord x);

"Coord" is highlighted twice, but neither "fcn" nor "x" is.  In a normal 
statement like:

int fcn (int x)

"int" is highlighted as are "fcn" and "x".

Can anyone suggest a way to make the behavior for Coord match that for 
int.  Any links to detail documentation on how this works would also be 
appreciated.  (For example, why all the quotes and slashes in the .emacs 
code?)

Thanks,
Mark

Re: help with font locking

[Kevin Rodgers]

Mark P wrote:
> I'm trying to edit my .emacs file so that in c++-mode a frequently used 
> user-defined type "Coord" is highlighted like any built-in type (int, 
> bool, etc.)  I searched around for a while but found only very limited 
> information.  The best I could produce was the following:
> 
> ;; customize font-locking
> (font-lock-add-keywords
> 'c++-mode
> '(("\\<\\(Coord\\)" 1 font-lock-type-face)
>   ) )
> 
> This sort of works.  In a statement like:
> 
> Coord fcn (Coord x);
> 
> "Coord" is highlighted twice, but neither "fcn" nor "x" is.  In a normal 
> statement like:
> 
> int fcn (int x)
> 
> "int" is highlighted as are "fcn" and "x".
> 
> Can anyone suggest a way to make the behavior for Coord match that for 
> int.  Any links to detail documentation on how this works would also be 
> appreciated.  (For example, why all the quotes and slashes in the .emacs 
> code?)

Maybe http://simon.nitro.dk/dotfiles/emacs/ctypes.el is what you need:

(autoload 'ctypes-define-type "ctypes"
   "Add a new TYPE to current major mode and inform font-lock." t)

(add-hook 'c++-mode-hook
           (lambda ()
             (ctypes-define-type "Coord")))

-- 
Kevin Rodgers

Re: help with font locking

[Alan Mackenzie]

In gnu.emacs.help Mark P <usenet@fall2005remove.fastmailcaps.fm> wrote:
> I'm trying to edit my .emacs file so that in c++-mode a frequently used 
> user-defined type "Coord" is highlighted like any built-in type (int, 
> bool, etc.)  I searched around for a while but found only very limited 
> information.  The best I could produce was the following:

[ .... ]

> Can anyone suggest a way to make the behavior for Coord match that for 
> int.  Any links to detail documentation on how this works would also be 
> appreciated.  (For example, why all the quotes and slashes in the .emacs 
> code?)

In CC Mode 5.30, the new variable c++-font-lock-extra-types was
introduced to do exactly what you want.  Chances are, you've only got CC
Mode 5.28 (do M-x c-version).  In that case, download the latest version
(5.31.1) from <http://cc-mode.sourceforge.net/release.php>.  The variable
is documented on page "Font Locking Preliminaries" of the manual
distributed with the release.

> Thanks,
> Mark

-- 
Alan Mackenzie (Munich, Germany)
Email: aacm@muuc.dee; to decode, wherever there is a repeated letter
(like "aa"), remove half of them (leaving, say, "a").

Re: help with font locking

[Mark P]

Kevin Rodgers wrote:
> Mark P wrote:
> 
>> I'm trying to edit my .emacs file so that in c++-mode a frequently 
>> used user-defined type "Coord" is highlighted like any built-in type 
>> (int, bool, etc.)  I searched around for a while but found only very 
>> limited information.  The best I could produce was the following:
>>
>> ;; customize font-locking
>> (font-lock-add-keywords
>> 'c++-mode
>> '(("\\<\\(Coord\\)" 1 font-lock-type-face)
>>   ) )
>>
>> This sort of works.  In a statement like:
>>
>> Coord fcn (Coord x);
>>
>> "Coord" is highlighted twice, but neither "fcn" nor "x" is.  In a 
>> normal statement like:
>>
>> int fcn (int x)
>>
>> "int" is highlighted as are "fcn" and "x".
>>
>> Can anyone suggest a way to make the behavior for Coord match that for 
>> int.  Any links to detail documentation on how this works would also 
>> be appreciated.  (For example, why all the quotes and slashes in the 
>> .emacs code?)
> 
> 
> Maybe http://simon.nitro.dk/dotfiles/emacs/ctypes.el is what you need:
> 
> (autoload 'ctypes-define-type "ctypes"
>   "Add a new TYPE to current major mode and inform font-lock." t)
> 
> (add-hook 'c++-mode-hook
>           (lambda ()
>             (ctypes-define-type "Coord")))
> 

That worked!  Thanks!

-Mark

Re: help with font locking

[Mark P]

Alan Mackenzie wrote:
> In gnu.emacs.help Mark P <usenet@fall2005remove.fastmailcaps.fm> wrote:
> 
>>I'm trying to edit my .emacs file so that in c++-mode a frequently used 
>>user-defined type "Coord" is highlighted like any built-in type (int, 
>>bool, etc.)  I searched around for a while but found only very limited 
>>information.  The best I could produce was the following:
> 
> 
> [ .... ]
> 
> 
>>Can anyone suggest a way to make the behavior for Coord match that for 
>>int.  Any links to detail documentation on how this works would also be 
>>appreciated.  (For example, why all the quotes and slashes in the .emacs 
>>code?)
> 
> 
> In CC Mode 5.30, the new variable c++-font-lock-extra-types was
> introduced to do exactly what you want.  Chances are, you've only got CC
> Mode 5.28 (do M-x c-version).  In that case, download the latest version
> (5.31.1) from <http://cc-mode.sourceforge.net/release.php>.  The variable
> is documented on page "Font Locking Preliminaries" of the manual
> distributed with the release.
> 

Great tip, thanks!  Not only does it solve my problem, it also improves 
the font-lock behavior quite generally.