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From: Dirk Herrmann <dirk@dirk-herrmanns-seiten.de>
Cc: guile-devel@gnu.org, Marius Vollmer <marius.vollmer@uni-dortmund.de>
Subject: Re: GH replacement proposal (includes a bit of Unicode)
Date: Thu, 22 Apr 2004 19:48:24 +0200	[thread overview]
Message-ID: <40880568.80006@dirk-herrmanns-seiten.de> (raw)
In-Reply-To: <8765bs8x5y.fsf@trouble.defaultvalue.org>

Rob Browning wrote:

>Dirk Herrmann <dirk@dirk-herrmanns-seiten.de> writes:
>
>  
>
>>Alternative 1:
>>* change the functions in the following way:
>>  <type> scm_to_<type> (SCM value, int *success)
>>  Instead of signalling an error, *success indicates whether the value
>>can be represented. If *success is 0, the returned value is
>>unspecified. If success is NULL, an error is signalled for the case
>>that the value can not be represented.
>>    
>>
>>Thus, I would prefer either alternative 1 or 2, favoring alternative 1.
>>    
>>
>
>I had the same concern, and offhand, think I'd probably prefer 1 as well.
>
Thinking more about it, I would even go further and simply disallow the 
passing of NULL. It's just another asymmetry and magic number. The rule 
woule be, that (if the SCM argument is of the correct type), the caller 
always has to provide a valid pointer for success. On the contrary, if 
the SCM argument is not of the correct type, an error should be thrown. 
The success argument is therefore only for overflow checks, not for type 
checks. This is symmetric with the other conversion functions.

Best regards
Dirk



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  reply	other threads:[~2004-04-22 17:48 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-07 13:00 GH replacement proposal (includes a bit of Unicode) Marius Vollmer
2004-04-07 15:04 ` Paul Jarc
2004-04-13 13:25   ` Marius Vollmer
2004-04-13 15:54     ` Paul Jarc
2004-04-21 15:08       ` Marius Vollmer
2004-04-21 16:10         ` Paul Jarc
2004-04-21 18:06           ` Marius Vollmer
2004-04-21 16:31         ` Delivery failure (guile-devel@gnu.org) Bruce Korb
2004-04-21 21:34           ` GH replacement proposal (includes a bit of Unicode) Marius Vollmer
2004-04-21 21:46             ` Paul Jarc
2004-04-21 22:19               ` Dale P. Smith
2004-04-21 22:34                 ` Paul Jarc
2004-04-21 23:02                 ` Kevin Ryde
2004-04-22 17:36             ` Dirk Herrmann
2004-04-22 18:31               ` Paul Jarc
2004-05-17 21:14                 ` Marius Vollmer
2004-05-17 21:57                   ` Bruce Korb
2004-05-18  9:54                     ` Marius Vollmer
2004-04-22 17:00         ` Dirk Herrmann
2004-04-24 10:06         ` Dirk Herrmann
2004-04-24 19:46           ` Marius Vollmer
2004-04-25 20:33             ` Dirk Herrmann
2004-04-25 21:38             ` Paul Jarc
2004-05-17 21:45               ` Marius Vollmer
2004-04-17 13:21 ` Dirk Herrmann
2004-04-22  4:16   ` Rob Browning
2004-04-22 17:48     ` Dirk Herrmann [this message]
2004-05-12 20:09   ` Marius Vollmer
2004-05-15  9:50     ` Dirk Herrmann
2004-05-24 18:51       ` Marius Vollmer
2004-05-25  0:21         ` Paul Jarc
2004-05-26 21:27         ` Dirk Herrmann
2004-06-03 21:40           ` Marius Vollmer
2004-06-04  6:52             ` tomas
2004-08-09 22:29               ` Marius Vollmer
2004-05-15 10:18     ` Dirk Herrmann
2004-05-24 19:36       ` Marius Vollmer
2004-05-26 22:11         ` Dirk Herrmann
2004-08-09 22:28           ` Marius Vollmer
2004-04-22  4:39 ` Rob Browning
2004-04-22 17:58   ` Dirk Herrmann
2004-04-23  0:25     ` Rob Browning
2004-04-23 16:57   ` Marius Vollmer
2004-04-23 17:16     ` Rob Browning
2004-05-17 21:24       ` Marius Vollmer
2004-04-23 17:36     ` Andreas Rottmann
2004-05-17 21:30       ` Marius Vollmer
2004-05-18  9:21         ` Andreas Rottmann
2004-04-25  7:54     ` Dirk Herrmann
2004-05-17 21:44       ` Marius Vollmer

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