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From: "Stefan Monnier" <monnier+gnu.emacs.help/news/@flint.cs.yale.edu>
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Subject: Re: Coloring a command in LateX-mode?
Date: 23 Jun 2003 16:27:39 -0400
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>>>>> "Nicolas" == Nicolas Neuss <Nicolas.Neuss@iwr.uni-heidelberg.de> writes:
> \ifg{Hallo}{Hello}!

If the `Hallo' and `Hello' parts are short enough (a couple lines at most),
you can use font-lock-add-keywords in your tex-mode-hook.

Otherwise, you'll have to use something more complex and it's probably not
worth the trouble.  If you really insist on doing it, I'd recommend you
look at how perl-mode and cperl-mode handle the s/.../.../
command highlighting (they use two different approaches).
For perl-mode, you'll have to look at the version that's in Emacs-CVS
because the version in Emacs-21.3 does not have this code yet.


        Stefan