NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/std/c/386

Text File | 1996-08-06 | 2.2 KB | 46 lines

Path: sun001.spd.dsccc.com!spd!jmccarty
From: [e-mail] (Mike McCarty)
Newsgroups: comp.lang.c,comp.std.c
Subject: Re: Integral conversion e.t.c. (was: Re: Hungarian notation)
Date: 14 Feb 1996 19:45:21 GMT
Organization: DSC Communications Corporation, Plano, Texas USA
Message-ID: <4fte4h$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <4fqfgg$[e-mail]>
NNTP-Posting-Host: aplo139.spd.dsccc.com

In article <4fqfgg$[e-mail]>,
Marino Ladavac <[e-mail]> wrote:
)James Kanze US/ESC 60/3/141 #40763 ([e-mail]) wrote:
): In article <[e-mail]> [e-mail] (Michael Furman)
): writes:
)
): In fact, according to the standard, undefined behavior is just that:
): undefined.  The standard makes no constraints.  In real life, of
): course, implementations will behave in a somewhat more restricted
): manner.  Thus, for example, I think it is safe to say that on no real
): implementation will "i = i ++" actually reformat your disk (although
): the probablity of it doing what you want is significantly less than
): 1).  The standard does not try and determine exactly what might really
): happen in each distinct case of undefined behavior, however.
)
)Well, one cannot really safely say that "i = i++" will or will not
)have catastrophic consequences as the offending line is usually not in
)isolation.  For instance, if the "offender" were a part of the, let's
)say, OS filing system code, anything could happen.
)
)/Alby

Let's not overlook malicious compiler writers. Rumor has it that a
certain compiler writer (who shall remain nameless, but who supposedly
has associations with something which might be called FSF) decided that
he did not like the fact that "#pragma" as described by ANSI was allowed
to do whatever the compiler writer liked. So he made all "#pragma"s jump
to a subroutine in the compiler to run the Towers of Hanoi puzzle, and
not output any code. Supposedly, later, that was removed.

Mike
----
char *p="char *p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}

I don't speak for DSC.         <- They make me say that.