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Groups > comp.lang.c++ > #5379
| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Is this valid code or UB? |
| Date | 2011-05-24 11:15 +1200 |
| Message-ID | <94084lFt2pU16@mid.individual.net> (permalink) |
| References | <UKACp.14009$UY3.5807@newsfe20.ams2> |
On 05/24/11 09:57 AM, Paul wrote:
> Yes I'm still arguing about arrays. Anyway consider the following:
>
> int main(){
> int (*p)[3]=0;
> std::cout<<*p<<std::endl;
> std::cout<< typeid(*p).name()<<std::endl;
> std::cout<< sizeof(*p);
> }
>
> Does a valid array type object exist?
No.
> Is it UB because it dereferences a null pointer?
Yes.
--
Ian Collins
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Is this valid code or UB? "Paul" <pchristor@yahoo.co.uk> - 2011-05-23 22:57 +0100
Re: Is this valid code or UB? Leigh Johnston <leigh@i42.co.uk> - 2011-05-23 23:05 +0100
Re: Is this valid code or UB? Anand Hariharan <mailto.anand.hariharan@gmail.com> - 2011-05-23 16:04 -0700
Re: Is this valid code or UB? Ian Collins <ian-news@hotmail.com> - 2011-05-24 11:15 +1200
Re: Is this valid code or UB? Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-23 16:35 -0700
Re: Is this valid code or UB? "Alf P. Steinbach /Usenet" <alf.p.steinbach+usenet@gmail.com> - 2011-05-24 02:38 +0200
Re: Is this valid code or UB? Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-23 18:36 -0700
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