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Re: Void variable error in fontification code

From: Michael Heerdegen
Subject: Re: Void variable error in fontification code
Date: Fri, 11 Nov 2016 17:04:16 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

Davin Pearson <> writes:

> (setq d-face-m4     'd-face-m4)
> (setq d-face-m4-dnl 'd-face-m4-dnl)

>       (,(concat "\\(\\<m4_" "dnl\\)\\(.$\\)") (1 d-face-m4-dnl t) (2 
> font-lock-comment-face))

I think you get confused by the fact that symbols are used as face
names.  For font lock keywords, faces are specified via face
expressions.  You specify a variable above, so its value has to be set
(to a face name), else you get the unbound error.

Instead, you can directly specify a face in form of a symbol, and since
this place is evaluated, you need to quote the name.

It's a bit weird in Emacs that faces effectively use a separate name
space, but they are specified as symbols, and in some cases, variables
having the same name as a face are bound to that face name (symbol).


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