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Re: loss of abstraction

To: srfi-72@xxxxxxxxxxxxxxxxx
Subject: Re: loss of abstraction
From: Marcin 'Qrczak' Kowalczyk <qrczak@xxxxxxxxxx>
Date: Wed, 24 Aug 2005 23:08:34 +0200
Delivered-to: srfi-72@xxxxxxxxxxxxxxxxx
In-reply-to: <430CD294.2010009@xxxxxxxxxxxxxxxx> (Alan Watson's message of "Wed, 24 Aug 2005 15:03:32 -0500")
Mail-followup-to: srfi-72@xxxxxxxxxxxxxxxxx
References: <20050822155106.4ECCC60009B@xxxxxxxxxxxxxxxxxxxxxxx> <y9loe7qosw9.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <Pine.LNX.4.58.0508220921520.2580@xxxxxxxxxxxxxx> <y9lslx1nmli.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <Pine.GSO.4.60.0508231008110.13579@xxxxxxxxxxxxxxxxx> <87mzn8lkcf.fsf@xxxxxxxxxxxxx> <430CD294.2010009@xxxxxxxxxxxxxxxx>
Sender: Marcin 'Qrczak' Kowalczyk <qrczak@xxxxxxxxxx>
User-agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux)

Alan Watson <a.watson@xxxxxxxxxxxxxxxx> writes:

> [*] Distinguishing nulls is easy:

Any way of distinguishing nulls breaks the natural implementation of
eq? by just comparing machine words.

-- 
   __("<         Marcin Kowalczyk
   \__/       qrczak@xxxxxxxxxx
    ^^     http://qrnik.knm.org.pl/~qrczak/

References:
- loss of abstraction
  - From: Andrew Wilcox
- Re: loss of abstraction
  - From: Michael Sperber
- Re: loss of abstraction
  - From: bear
- Re: loss of abstraction
  - From: Michael Sperber
- Re: loss of abstraction
  - From: Andre van Tonder
- Re: loss of abstraction
  - From: Marcin 'Qrczak' Kowalczyk
- Re: loss of abstraction
  - From: Alan Watson

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