🚀 go-pugleaf

In article <wwJXVB3w164w@amfent.Gwinnett.COM> amf@amfent.Gwinnett.COM (Andy Feibus) writes:
>jamesc@swapsdev.state.state.COM.AU (James Cribb) writes:
>> Given
>>     struct Something*  ps;
>>     unsigned  k;
>> do the C or C++ standards guarantee that
>>     &ps[k] == ((char*) ps) + k * sizeof(struct Something)
>Assuming that you [cm]alloc enough memory for ps to support accessing the
>k'th element of it, the answer is... no.

He was asking about the standards, for which (under the condition you state)
the answer is... yes.

>Different compilers see &ps[k] differently; use parentheses to clarify:
> &(ps[k]).

Even K&R-1 and Stroustrop-1 prohibited seeing this expression differently.
Parenthesization is nice for human readers so that we don't have to look it
up all the time, but not necessary for C or C++ compilers.
--
Norman Diamond       diamond@jit081.enet.dec.com
If this were the company's opinion, I wouldn't be allowed to post it.
"It's been a lovely recession."