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From: meissner@dg_rtp.UUCP
Newsgroups: comp.lang.c
Subject: Re: Character types in ANSI C
Message-ID: <1242@dg_rtp.UUCP>
Date: Sat, 28-Feb-87 14:55:29 EST
Article-I.D.: dg_rtp.1242
Posted: Sat Feb 28 14:55:29 1987
Date-Received: Sun, 1-Mar-87 17:20:10 EST
References: <816@cullvax.UUCP>
Reply-To: meissner@dg_rtp.UUCP (Michael Meissner)
Organization: Data General (Languages @ Research Triangle Park, NC.)
Lines: 23

In article <816@cullvax.UUCP> drw@cullvax.UUCP (Dale Worley) writes:
> cg@myrias.UUCP (Chris Gray) writes:
> > I.e. which of the following are legal:
> > 
> >     char *p1;
> >     unsigned char *p2;
> >     signed char *p3;
> > 
> >     p1 = p2;	    /* case 1 */
> >     p1 = p3;	    /* case 2 */
> >     p2 = p3;	    /* case 3 */
> 
> Well, the char's are all widened into the 'appropriate' int types.
> (These are called integral promotions, or some such.)  Then the
> appropriate comparisons of int's and/or unsigned int's are performed.

Ughh, the above example is assigning pointers, not the items pointed
to.  Assigning pointers to different types (modulo const/volatile) is
illegal in ANSI.  Widening has nothing to do with it.
-- 
	Michael Meissner, Data General	Uucp: ...mcnc!rti-sel!dg_rtp!meissner

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