Individual character coloring

Individual character coloring

[Fab]

Dear All,

I would like to highlight the semicolon with a different color in
c++-mode and also matlab-mode.  I could not identify a special face of
the semicolon with C-u C-x =, is there something like
font-lock-comment-delimiter-face for a line terminator?  If not is there
an easy way to accomplish my need?

Thanks
Fab

Re: Individual character coloring

[Thamer Mahmoud]

Fab <fab4100@gmail.com> writes:
> I would like to highlight the semicolon with a different color in
> c++-mode and also matlab-mode.  I could not identify a special face of
> the semicolon with C-u C-x =, is there something like
> font-lock-comment-delimiter-face for a line terminator?  If not is there
> an easy way to accomplish my need?
>

This should do it:

(font-lock-add-keywords 'c++-mode '(("\\(;\\)" 1 font-lock-warning-face)))

-- 
Thamer

Re: Individual character coloring

[jpkotta]

On Wednesday, May 30, 2012 6:03:20 AM UTC-5, Fab wrote:
> Dear All,
> 
> I would like to highlight the semicolon with a different color in
> c++-mode and also matlab-mode.  I could not identify a special face of
> the semicolon with C-u C-x =, is there something like
> font-lock-comment-delimiter-face for a line terminator?  If not is there
> an easy way to accomplish my need?
> 
> Thanks
> Fab

I do something similar to this for most programming modes:

,----
| (defvar operators-regexp 
|   (regexp-opt '("+" "-" "*" "/" "%" "!"
|                 "&" "^" "~" "|"
|                 "=" "<" ">"
|                 "." "," ";" ":" "?"))
|   "Regexp matching symbols that are operators in most programming
|   languages.")
| 
| (setq operators-font-lock-spec
|       (cons operators-regexp
|             (list 
|              0 ;; use whole match
|              'font-lock-builtin-face
|              'keep ;; OVERRIDE
|              )))
| 
| (font-lock-add-keywords
|  'c++-mode
|  (list 
|   operators-font-lock-spec))
`----

Clearly you can use whatever face you want instead of font-lock-builtin-face.

Re: Individual character coloring

[Fab]

jpkotta <jpkotta@gmail.com> writes:

> On Wednesday, May 30, 2012 6:03:20 AM UTC-5, Fab wrote:
>> Dear All,
>> 
>> I would like to highlight the semicolon with a different color in
>> c++-mode and also matlab-mode.  I could not identify a special face of
>> the semicolon with C-u C-x =, is there something like
>> font-lock-comment-delimiter-face for a line terminator?  If not is there
>> an easy way to accomplish my need?
>> 
>> Thanks
>> Fab
>
> I do something similar to this for most programming modes:
>
> ,----
> | (defvar operators-regexp 
> |   (regexp-opt '("+" "-" "*" "/" "%" "!"
> |                 "&" "^" "~" "|"
> |                 "=" "<" ">"
> |                 "." "," ";" ":" "?"))
> |   "Regexp matching symbols that are operators in most programming
> |   languages.")
> | 
> | (setq operators-font-lock-spec
> |       (cons operators-regexp
> |             (list 
> |              0 ;; use whole match
> |              'font-lock-builtin-face
> |              'keep ;; OVERRIDE
> |              )))
> | 
> | (font-lock-add-keywords
> |  'c++-mode
> |  (list 
> |   operators-font-lock-spec))
> `----
>
> Clearly you can use whatever face you want instead of font-lock-builtin-face.

cool! appreciated

Fab