Article View: comp.std.c++
Article #416Re: Packing Across Inheritance Boundari
From: Ron Guilmette
Date: Fri, 24 Aug 1990 06:53
Date: Fri, 24 Aug 1990 06:53
34 lines
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1557 bytes
In article <56843@microsoft.UUCP> jimad@microsoft.UUCP (Jim ADCOCK) writes:
+... {some things} make packing order compatibility a moot issue:
...
+Derived contiguous with parent structures, or references?
I hope so.
+segmented or flat pointers?
Everybody except Intel uses flat. (No flames please. All generalizations
are false, including this one.)
+... Thus, please leave compiler implementation
+details out of the language specification.
One man's "implementation detail" is another man's language semantics.
I believe that ANSI C requires that:
(&a[2] - &a[1]) == 1
Are you going to suggest that this should have been left out of ANSI C
because it unduly restricts the implementation of arrays to consecutive
memory locations with ascending addresses?
How about the semantics of `volatile'? Should that all be tossed out of
ANSI C also? After all, it does put some rather specific constraints on
implementations.
--
// Ron Guilmette - C++ Entomologist
// Internet: rfg@ncd.com uucp: ...uunet!lupine!rfg
// Motto: If it sticks, force it. If it breaks, it needed replacing anyway.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!lupine!rfg From: rfg@NCD.COM (Ron Guilmette) Newsgroups: comp.std.c++ Subject: Re: Packing Across Inheritance Boundari Message-ID: <1316@lupine.NCD.COM> Date: 24 Aug 90 06:53:33 GMT References: <6540462@1990Aug3.211414.23872@watmath.wa> <13413@> <56843@microsoft.UUCP> Organization: Network Computing Devices, Inc., Mt. View, CA Lines: 34