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From: martin rudalics <rudalics@gmx.at>
Newsgroups: gmane.emacs.devel
Subject: Re: Some obsolete/unused/garbage things around window code?
Date: Tue, 10 Jan 2012 11:20:04 +0100
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 > 1) last_mark_x and last_mark_y fields of 'struct window' aren't used
 > anywhere
 >    except initialization in make_window - is it reasonable to drop them
 > at all?

Yes.

 > 2) What's an idea behind sequence_number of window objects? It's
 > initialized
 >    within make_window and make_parent_window, but used only in printing
 > code.

How else would we identify windows in printed notation?  BTW I plan to
make sequence numbers available in Elisp for 24.2.

martin