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From: d88-jwa@dront.nada.kth.se (Jon W{tte)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Think C ?: struct bug
Message-ID: <1990Nov18.103920.24295@nada.kth.se>
Date: 18 Nov 90 10:39:20 GMT
References: <29910@boulder.Colorado.EDU> <HAIRSTON.90Nov17132639@henry.ece.cmu.edu>
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 34

In article <HAIRSTON.90Nov17132639@henry.ece.cmu.edu> hairston@henry.ece.cmu.edu (David Hairston) writes:

>[bernard@boulder.Colorado.EDU (Bernie Bernstein) writes:]

>[] typedef struct {
>[]	 long a;
>[]	 long b;
>[]   } MY_TYPE;

>[] foo(short x)
>[] {
>[]	MY_TYPE    id1,id2,id3;
>[]
>[]	id1 = x ? id2 : id3;   /* Illegal operation on struct/union */

>my guess is that you've declared id1 to have allocated space and so
>you can't change it's address as implied above.  i believe you want:

>	MY_TYPE	*id1, id2, id3;
>	id1 = x ? &id2 : &id3;

Well, this is something else. You should be able to assign structs
to each other. This should result in a bitwise copy. Like,

id1 = id2 ; /* This is BlockMove ( id2 , id1 , sizeof ( id1 ) ) */

>  -dave-  
>hairston@henry.ece.cmu.edu

Now, you should know that Think C isn't ANSI C, porting that beast ;-)

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