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Using 'register' and ^L

From: Dmitry Antipov
Subject: Using 'register' and ^L
Date: Wed, 10 Sep 2014 07:12:09 +0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.0

1) Is there a reason to use explicit 'register' variables nowadays?
   This encumbers sources with no measurable benefits; moreover,
   some GC tracing/debugging techniques assumes that you can take
   an address of any Lisp_Object, which is effectively blocked by
   using 'register'.

2) Why still using ^L?  It looks like a huge empty space in patches
   showing as attachment in some e-mail clients, and I'm curious
   whether someone still uses a printing system relying on ^L page
   breaks :-).


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