Re: Faces customization group linked from mode groups

[Lennart Borgman <lennart.borgman.073@student.lu.se>]

Juri Linkov wrote:

>>There was recently a question on the gnu-emacs-help list from someone
>>trying to customize the faces used in syntax highlighting C mode. He
>>looked in C mode customization group but could not find it.
>>
>>Maybe it would be a good idea to have a link to the faces customization
>>from each mode customization group? (If that is possible in a simple way?)
>>    
>>
>
>One solution is to add the parent group `font-lock-highlighting-faces'
>to all groups of modes that support font-lock.  But this has one negative
>effect: the `group' link is two-directional, so the customization group
>`font-lock-highlighting-faces' will display too many children links
>to all such groups.
>  
>
Is not this the opposite way of the way Richard suggested? But the 
problem you mention should essentially be the same, or?

>A better solution is to implement a new one-directional link to another
>customization group.  Currently `:link' supports four link types, and a
>new link type could have the name `custom-group'.  It could create a
>one-directional link in the customization buffer leading to the specified
>group, e.g.:
>
>(defgroup c nil
>  "Support for the C language and related languages."
>  :link '(custom-manual "(ccmode)")    ;; this is already existing link
>  :link '(custom-group font-lock-highlighting-faces) ;; a new link type
>  :group 'languages)
>  
>
To me this seems like the way to go.

When it comes to updating these defgroup:s, is there an easy way to find 
all these modes?