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bug#10650: view-mode inconsistencies wrt special mode-class

From: Glenn Morris
Subject: bug#10650: view-mode inconsistencies wrt special mode-class
Date: Mon, 30 Jan 2012 21:50:54 -0500
User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)

Stefan Monnier wrote:

> Note that part of the problem here, really is `special mode-class',
> which is a largely undefined concept both in terms of "what it's
> supposed to mean" and "what effects does it have".

AFAIK, the only documented meaning of special mode-class is:

If the default-value of major-mode is nil, then creating a new buffer
inherits the major-mode of the previously current buffer UNLESS that
buffer has a special mode-class, in which case the new buffer gets
fundamental mode. (Doesn't seem a very useful feature to me.)

The only other effect I am aware of it having is the one on view-mode
(which isn't documented, and seems unrelated to the previous paragraph.)

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