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From: davidsen@crdos1.crd.ge.COM (Wm E Davidsen Jr)
Newsgroups: comp.lang.c
Subject: Re: sizeof a struc field
Message-ID: <864@crdos1.crd.ge.COM>
Date: 6 Oct 89 15:28:50 GMT
References: <7710@microsoft.UUCP> <11086@smoke.BRL.MIL> <131@dtoa3.dt.navy.mil> <7653@cdis-1.uucp>
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: GE Corp R&D Center
Lines: 15

In article <7653@cdis-1.uucp>, tanner@cdis-1.uucp (Dr. T. Andrews) writes:

|  Remember that sizeof() is a compile-time operation.  Do we expect
|  the compiler to do flow analysis to determine whether we are feeding
|  a valid pointer into a sizeof() expression?

  Why should flow analysis be needed? If the pointer is defined, call it
p, then:
	sizeof(p)	sizeof a pointer to a {type}
	sizeof(*p)	sizeof an object of {type}
-- 
bill davidsen	(davidsen@crdos1.crd.GE.COM -or- uunet!crdgw1!crdos1!davidsen)
"The world is filled with fools. They blindly follow their so-called
'reason' in the face of the church and common sense. Any fool can see
that the world is flat!" - anon