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- Newsgroups: comp.std.c++
- Path: sparky!uunet!munnari.oz.au!cs.mu.OZ.AU!munta.cs.mu.OZ.AU!fjh
- From: fjh@munta.cs.mu.OZ.AU (Fergus James HENDERSON)
- Subject: Re: Pointer comparisons
- Message-ID: <9235623.27053@mulga.cs.mu.OZ.AU>
- Sender: news@cs.mu.OZ.AU
- Organization: Computer Science, University of Melbourne, Australia
- References: <BzCG7K.2sG@frumious.uucp> <1992Dec16.202711.22367@bcrka451.bnr.ca> <BzDs2x.wA@frumious.uucp> <1992Dec17.151642.9954@bcrka451.bnr.ca>
- Date: Mon, 21 Dec 1992 12:50:09 GMT
- Lines: 20
-
- sjm@bcrki65.bnr.ca (Stuart MacMartin) writes:
-
- >In article <BzDs2x.wA@frumious.uucp> uunet.ca!frumious!pat writes:
- >>
- >> Two pointers to the same object compare equal. If two pointers
- >
- >...but nowhere do I see a statement that (p == q) ==> p and q point
- >to the same object, even if p and q are the same type.
-
- This is apparently an oversight, an unintend omission.
- The ANSI C standard includes such a guarantee, so I am told,
- so C compatability requires that this hold at least for C++ objects
- that are also C objects. (Though it needn't apply for empty
- structs/classes, for example, since C doesn't allow empty structs.)
-
- --
- Fergus Henderson fjh@munta.cs.mu.OZ.AU
- This .signature virus is a self-referential statement that is true - but
- you will only be able to consistently believe it if you copy it to your own
- .signature file!
-