From: Matthew Heaney <matthew_heaney@acm.org>
Subject: Re: System.Address_to_Access_Conversions
Date: 1998/07/26
Date: 1998-07-26T00:00:00+00:00 [thread overview]
Message-ID: <m3btqd964p.fsf@mheaney.ni.net> (raw)
In-Reply-To: 6ogieq$qlo@drn.newsguy.com
nabbasi@earthlink.net writes:
> I read somewhere that the tag position within a record is always defined,
> it is the first element always, right? not sure what's its size, I assume
> it is an address to someother tag related information somewhere else, so its
> size is also known, right?
This is all wrong. A compiler writer is free to use any implementation
he pleases.
Don't use tagged types to exchange data across an external interface
(unless you're using the DSA). Use a straight record type, and specify
a representation clause to match the characteristics of the hardware.
Why do programmers like to use tagged types for everything? Choose the
simplest type for the job, not the most complex.
To paraphrase Robert's comment in a recent post, just because you buy a
super-fancy socket wrench doesn't mean you have to throw away all your
other wrenches!
next prev parent reply other threads:[~1998-07-26 0:00 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-07-13 0:00 System.Address_to_Access_Conversions jsanchor
1998-07-13 0:00 ` System.Address_to_Access_Conversions Stephen Leake
1998-07-14 0:00 ` System.Address_to_Access_Conversions jsanchor
1998-07-14 0:00 ` System.Address_to_Access_Conversions Anonymous
1998-07-14 0:00 ` System.Address_to_Access_Conversions Pascal MALAISE
1998-07-14 0:00 ` System.Address_to_Access_Conversions jsanchor
1998-07-14 0:00 ` System.Address_to_Access_Conversions David C. Hoos, Sr.
1998-07-14 0:00 ` System.Address_to_Access_Conversions nabbasi
1998-07-14 0:00 ` System.Address_to_Access_Conversions David C. Hoos, Sr.
1998-07-15 0:00 ` System.Address_to_Access_Conversions jsanchor
1998-07-15 0:00 ` System.Address_to_Access_Conversions David C. Hoos, Sr.
1998-07-14 0:00 ` System.Address_to_Access_Conversions Robert Dewar
1998-07-26 0:00 ` Matthew Heaney [this message]
1998-07-26 0:00 ` System.Address_to_Access_Conversions nababsi
1998-07-26 0:00 ` System.Address_to_Access_Conversions Charles Hixson
1998-07-26 0:00 ` System.Address_to_Access_Conversions Charles Hixson
1998-07-26 0:00 ` System.Address_to_Access_Conversions Robert Dewar
1998-07-26 0:00 ` System.Address_to_Access_Conversions Matthew Heaney
1998-07-26 0:00 ` System.Address_to_Access_Conversions Robert Dewar
1998-07-26 0:00 ` System.Address_to_Access_Conversions nabbasi
1998-07-26 0:00 ` System.Address_to_Access_Conversions Robert Dewar
1998-07-14 0:00 ` System.Address_to_Access_Conversions jsanchor
1998-07-14 0:00 ` System.Address_to_Access_Conversions David C. Hoos, Sr.
-- strict thread matches above, loose matches on Subject: below --
1998-07-15 0:00 System.Address_to_Access_Conversions Marin David Condic, 561.796.8997, M/S 731-96
1998-07-26 0:00 ` System.Address_to_Access_Conversions Matthew Heaney
1998-07-27 0:00 System.Address_to_Access_Conversions Marin David Condic, 561.796.8997, M/S 731-96
1998-07-28 0:00 ` System.Address_to_Access_Conversions Stephen Leake
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