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Re: Help with font-lock-add-keywords

From: Marcin Borkowski
Subject: Re: Help with font-lock-add-keywords
Date: Fri, 13 Mar 2015 07:39:31 +0100

On 2015-03-13, at 04:47, Michael Heerdegen <> wrote:

> Marcin Borkowski <> writes:
>> (font-lock-add-keywords nil '(("foo" . italic)))
> According to the doc of `font-lock-keywords', the FACENAME is actually
> an expression that gets evaluated.  So you must probably quote `italic',
> or define a variable that is bound to 'italic.  There are lots of
> variables in Emacs named xxx-face that are bound to face names.

Wow.  Just wow!  I thought I tried it, but somehow I must have done
something wrong.  I did what you suggested now and it worked.  Thanks!

For the record: both quoting and defining a variable worked.  Also, the
strange problem I was writing about seems to be fixed now.  I guess what
happened was this: I did not quote the name of the face (since it wasn't
really `italic', it was my custom one), and Emacs tried to evaluate the
unquoted (and undefined) symbol in the midst of fontifying, so there as
an error and the fontifying routine crashed.  (Just my suspicion, but
seems reasonable.)

> Michael.

Thanks again!

PS. Expect a blog post about keyword-based font-lock soon. ;-)

Marcin Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

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