font-lock and regexp-opt

font-lock and regexp-opt

[Mads Jensen]

Hi NG,

I am trying to write my first major mode, where I'd like to use
font-lock-mode to colorize some words. I browsed some code, and saw that
people are using regexp-opt for this, so I went with this approach,
too. Therefore, I have:

(defconst inducks-keywords 
  (regexp-opt '(...) t) "inducks fields to colorize")

And wrote the following:

(defconst inducks-font-heroes
  (list 
   (cons 
    (concat "\\<\\(" inducks-keywords "\\)\\>")
    'inducks-keyword)))

Is this a good way to do it ? It doesn't compile. I posted the entire
file here: http://mads.har-talt.dk/inducks.el (I am concentrating on
writing the font-lock part at the moment)

I am a total newbie in Emacs Lisp, but prefer trying to write something
useful instead of doing a lot of exercises. Naturally I read
documentation and tutorials, too.
--
Mads Jensen - mail sent to address ends in /dev/null
              s/spam/madsj for emailing me 
              gpg: 7E775BDA

It is impossible to make anything foolproof because fools are so
ingenious.

Re: font-lock and regexp-opt

[Stefan Monnier]

> (defconst inducks-keywords 
>   (regexp-opt '(...) t) "inducks fields to colorize")

> (defconst inducks-font-heroes
>   (list 
>    (cons 
>     (concat "\\<\\(" inducks-keywords "\\)\\>")
>     'inducks-keyword)))

> Is this a good way to do it ?

Looks OK to me.

> It doesn't compile.

Care to give us more info as to *how* it fails to compile?


        Stefan

Re: font-lock and regexp-opt

[Mads Jensen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:
> Looks OK to me.
OK.
> Care to give us more info as to *how* it fails to compile?

I hacked a little bit more on the mode yesterday and today and added
some more stuff; I updated the file where compilation errors can be
found. 

Thanks for the help so far, both of you!
-- 
Mads Jensen - mail sent to address ends in /dev/null
              s/spam/madsj for emailing me 
              gpg: 7E775BDA

It is impossible to make anything foolproof because fools are so
ingenious.

Re: font-lock and regexp-opt

[August Karlstrom]

Mads Jensen wrote:
> I am trying to write my first major mode, where I'd like to use
> font-lock-mode to colorize some words. I browsed some code, and saw that
> people are using regexp-opt for this, so I went with this approach,
> too. Therefore, I have:
> 
> (defconst inducks-keywords 
>   (regexp-opt '(...) t) "inducks fields to colorize")

(regexp-opt '(...) 'words) is even better.

> And wrote the following:
> 
> (defconst inducks-font-heroes
>   (list 
>    (cons 
>     (concat "\\<\\(" inducks-keywords "\\)\\>")
>     'inducks-keyword)))
> 
> Is this a good way to do it ? It doesn't compile. 

How does the compilation fail. Which version of Emacs are you using and 
on what operating system? Have you `M-x h f regexp-opt' etc.


August