Bug in users command

[Norman Diamond]

In article <1991Jan24.004044.13362 at craycos.com> pmk at craycos.com (Peter Klausler) writes:

>Given the declaration
>	char (*a)[N];
>the expressions
>	(char *) a
>	&((*a)[0])
>	*a
>are all valid in ANS X3.159-1989, all of type "char *", and all yield pointers
>to the same char object.

No.  The last two yield pointers to the same char object, the first char in *a.

The first one coerces a pointer-to-array to a pointer-to-char value.
The standard guarantees that you can take a pointer-to-something, cast it to
a pointer-to-char, cast it back to a pointer-to-something, and the result is
equivalent to the original pointer.  It does not guarantee that the value
with type pointer-to-char can actually be used for anything.

--
Norman Diamond       diamond at tkov50.enet.dec.com
If this were the company's opinion, I wouldn't be allowed to post it.