assignment: left-to-right or right-to-left evaluation?
Georg Wrede
georg.wrede at iki.fi
Sat May 16 19:32:21 PDT 2009
Andrei Alexandrescu wrote:
> Christopher Wright wrote:
>> Georg Wrede wrote:
>>> bearophile wrote:
>>>> Georg Wrede:
>>>>
>>>>> arra[i] = arrb[i++];
>>>>> arra[i++] = arrb[i];
>>>>> I'm not sure that such dependences are good code.
>>>>> By stating a definite order between lvalue and rvalue, you
>>>>> would actually encourage this kind of code.
>>>>
>>>> I agree that putting such things in code is bad, but nowadays the
>>>> solution adopted by C is Just Wrong. To help avoid bugs from your
>>>> programs the language has to avoid undefined behaviors (this is one of
>>>> the lessons of Java).
>>>
>>> If Walter had ulimited time, the of course I'd favor either defining
>>> the precedence, or then enforcing errors on them, and not leaving
>>> them undefined.
>>
>> $ su walter
>> $ ulimit -t unlimited
>
> I swear I wanted to post this too! :o)
Nice quips, from you both... :-)
But there's a bug in the algorithm. A more correct version would be:
$ su
$ ulimit -t unlimited
$ su walter
$
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