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From: lee
Subject: overlays?
Date: Tue, 18 Mar 2014 02:40:35 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)


could someone please shed a light on the purpose of overlays?  I`m
wondering under what circumstances they are used, or need to be used.
Are they a feature that has been obsoleted by font-lock, or are they
still needed?

The background is that I`ve made an extension to hi-lock.el, and hi-lock
features alternatively using overlays or font-lock.  My extension does
not support overlays, and I`m wondering if support for overlays needs to
be added or not.

Knowledge is volatile and fluid.  Software is power.

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