GNU bug report logs - #11604
USE_LISP_UNION_TYPE + USE_LSB_TAG cleanup.

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Package: emacs;

Reported by: Paul Eggert <eggert <at> cs.ucla.edu>

Date: Fri, 1 Jun 2012 23:40:02 UTC

Severity: minor

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

Full log

Message #23 received at 11604 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 11604 <at> debbugs.gnu.org
Subject: Re: bug#11604: USE_LISP_UNION_TYPE + USE_LSB_TAG cleanup.
Date: Sun, 03 Jun 2012 09:26:46 +0200

Paul Eggert <eggert <at> cs.ucla.edu> writes:

> Because the union type is for debugging, not for production.
> It's used mostly to make sure that (for example) one doesn't
> mistakenly write "x = y" when one meant to write "x = XINT (y)".

That doesn't make sense.  You don't need a bitfield for that, just a
struct around EMACS_INT.  If we want to go that route we should rip out
the union Lisp_Object completely.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
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This bug report was last modified 12 years and 302 days ago.

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