font-lock-add-keywords problem

font-lock-add-keywords problem

[Stefan Bienert]

Hi there,

I have a problem with the adding of own types to the c-mode in emacs. I have used:

(font-lock-add-keywords
 'c-mode
 '(("\\<\\(Shortint\\)\\>" 1 font-lock-type-face t)))

to make emacs highlighting the type "Shortint". But now its also highlighted in comments /* Shortint */.
What can I do to unhighlight it in comments?

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Stefan Bienert

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Re: font-lock-add-keywords problem

[Johan Bockgård]

Stefan Bienert <stefanbienert@web.de> writes:

> I have a problem with the adding of own types to the c-mode in
> emacs. I have used:
>
> (font-lock-add-keywords
>  'c-mode
>  '(("\\<\\(Shortint\\)\\>" 1 font-lock-type-face t)))
                                                   
Remove the `t' ------------------------------------^

> to make emacs highlighting the type "Shortint". But now its also
> highlighted in comments /* Shortint */. What can I do to unhighlight
> it in comments?

,----[ C-h v font-lock-keywords RET ]
| [...]
|
| MATCH-HIGHLIGHT should be of the form:
| 
|  (SUBEXP FACENAME [OVERRIDE [LAXMATCH]])
|
| [...]
|
| If OVERRIDE is t, existing fontification can be overwritten. [...]
`----

-- 
Johan Bockgård

Re: font-lock-add-keywords problem

[ken]

Stefan Bienert wrote:
> Hi there,
> 
> I have a problem with the adding of own types to the c-mode in emacs. I have used:
> 
> (font-lock-add-keywords
>  'c-mode
>  '(("\\<\\(Shortint\\)\\>" 1 font-lock-type-face t)))
> 
> to make emacs highlighting the type "Shortint". But now its also highlighted in comments /* Shortint */.
> What can I do to unhighlight it in comments?
> 

>From "C-h f font-lock-add-keywords":

"For example:

 (font-lock-add-keywords 'c-mode
  '(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
    ("\\<\\(and\\|or\\|not\\)\\>" . font-lock-keyword-face)))

adds two fontification patterns for C mode, to fontify `FIXME:' words,
even in comments, and to fontify `and', `or' and `not' words as
keywords...."

I'm no elisp programmer at all, but since no one else seems to know, I'm
guessing that you need to employ the syntax in the third line of the
example.  As a sidenote though, I tried the snippet of code above, only
changing "c-mode" to "html-helper-mode" and didn't get any highlighting
at all (this in a buffer which has html tags already highlighted).  The
help page didn't say anything about bat wings or eye of newt, but I
think you need those too.

hth,
ken
-- 
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