Path: utzoo!attcan!uunet!husc6!rutgers!att!whuts!mjs
From: mjs@whuts.ATT.COM (SCHEUTZOW)
Newsgroups: comp.os.minix
Subject: struct pointers
Message-ID: <5092@whuts.ATT.COM>
Date: 21 Nov 88 17:58:41 GMT
Organization: AT&T Bell Laboratories, Whippany NJ
Lines: 23

> Reply-To: katzung@laidbak.UUCP (Brian Katzung)
> Another bug...
> 
> 	struct { int m; } sa[1];
>   (1) sa->m = 0;			/* Compiler chokes on this */
>   (2) (&(*sa))->m = 1;		/* But this works */
> 
> The compiler complains about applying -> to an array. 
> 
Line (1) seems like a misuse of the pointer operator to me; I would
have written: 
		  sa[0].m = 0;

(After all, it was declared as an array)  Line (1) makes it past the
lint checker on this machine, but just because our compiler accepts it
doesn't mean that all of them must.  I'm tempted to ramble about pointer-
to-struct and pointer-to-array-of-struct, but I'll skip it.

Line (2) creates a pointer because of the "&", so using the pointer
operator shouldn't cause any trouble.

Mike S.
att!whuts!mjs