From: Dirk Herrmann <dirk@dirk-herrmanns-seiten.de>
Cc: guile-user@gnu.org, rm@fabula.de, guile-devel@gnu.org,
Marius Vollmer <mvo@zagadka.de>
Subject: Re: overriding car/cdr
Date: Sun, 08 Feb 2004 17:21:56 +0100 [thread overview]
Message-ID: <40266224.1030606@dirk-herrmanns-seiten.de> (raw)
In-Reply-To: <m3zncb8m6i.fsf_-_@multivac.cwru.edu>
Paul Jarc wrote:
>Marius Vollmer <mvo@zagadka.de> wrote:
>
>
>>Hmm, my immediate reaction is that car/cdr are too low-level for
>>making them overrideable, but map and for-each and other operations
>>that work on whole sequences look like good targets...
>>
>>
>
>Going that route, there will always be one more function that someone
>wants to be converted. Third-party libraries also often won't be able
>to handle generated lists without modification. OTOH, by modifying
>SCM_CAR/SCM_CDR, everything that handles lists automatically becomes
>able to handle generated lists, and the cost for normal lists is only
>the same cost as when compiling with -DSCM_DEBUG_PAIR_ACCESSES=1.
>
The macros SCM_CAR and SCM_CDR should IMO not changed to handle generic
pairs. In the guile kernel we need a layer to deal with the built-in low
level data types.
Best regards
Dirk
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next prev parent reply other threads:[~2004-02-08 16:21 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-16 9:41 Worrying development Roland Orre
2004-01-16 11:19 ` Thien-Thi Nguyen
2004-01-16 11:34 ` Roland Orre
2004-01-24 22:44 ` Thien-Thi Nguyen
2004-01-16 11:59 ` tomas
2004-01-18 21:05 ` Marius Vollmer
2004-01-18 21:58 ` Tom Lord
2004-01-22 16:11 ` Dirk Herrmann
2004-01-22 18:26 ` Shared Substrings [was: Worrying development] Robert Uhl
2004-01-22 18:42 ` Worrying development Tom Lord
2004-01-23 11:45 ` Dirk Herrmann
2004-01-23 17:16 ` Tom Lord
2004-01-23 21:01 ` Marius Vollmer
2004-01-23 22:18 ` Tom Lord
2004-01-24 0:27 ` Marius Vollmer
2004-01-24 0:53 ` Tom Lord
2004-01-23 22:28 ` Paul Jarc
2004-01-24 12:09 ` rm
2004-01-24 13:29 ` Marius Vollmer
2004-01-26 2:42 ` overriding car/cdr (was: Worrying development) Paul Jarc
2004-02-08 16:21 ` Dirk Herrmann [this message]
2004-02-08 18:09 ` overriding car/cdr Marius Vollmer
2004-02-08 20:56 ` Paul Jarc
2004-03-20 22:28 ` Marius Vollmer
2004-03-22 17:05 ` David Van Horn
2004-03-22 21:03 ` Marius Vollmer
2004-03-22 17:24 ` Paul Jarc
2004-01-23 22:37 ` Worrying development Dirk Herrmann
2004-01-23 23:25 ` Tom Lord
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