Re: Lets put it another way

From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: Lets put it another way
Date	2011-05-24 13:33 +1200
Message-ID	<940g82Ft2pU20@mid.individual.net> (permalink)
References	<bEDCp.16705$Am5.10787@newsfe05.ams2>

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On 05/24/11 01:14 PM, Paul wrote:
> Ok in connection to my previous post, lets remove the null pointer issue and
> consider this:
>
> #include<iostream>
>
> typedef int (*pparr)[3];
>
> int main(){
>   pparr p1 = (pparr)new int[3];
>   pparr p2= p1;
>   delete[] p1;
>   std::cout<<  *p2<<std::endl;

UB yet again.

>   std::cout<<  typeid(*p2).name();
> }
>
>
> In the last 2 lines does an array type object exist, even though there is no
> array object?

No.

> If not what is the object that stores the address and is interpreted as an
> array type by the typeid expression?

The typeid and sizeof operators do not evaluate their expression (unless 
in case of typeid the type is polymorphic).  So no object is required.

-- 
Ian Collins

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Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 02:14 +0100
  Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-24 13:33 +1200
    Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-23 18:39 -0700
      Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 10:42 +0100
        Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 03:00 -0700
          Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 03:03 -0700
            Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 14:54 +0100
              Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 13:46 -0700
                Re: Lets put it another way Leigh Johnston <leigh@i42.co.uk> - 2011-05-24 21:49 +0100
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 23:56 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 16:51 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 10:59 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 03:51 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 12:49 +0100
                Re: Lets put it another way "Joel C. Salomon" <joelcsalomon@gmail.com> - 2011-05-25 12:32 -0700
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:42 -0700
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:48 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 21:55 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:59 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:08 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 14:29 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:56 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 15:10 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:53 +0100
                Re: Lets put it another way "Joel C. Salomon" <joelcsalomon@gmail.com> - 2011-05-25 15:02 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:37 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:03 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:19 +0100
                Re: Lets put it another way Leigh Johnston <leigh@i42.co.uk> - 2011-05-26 00:29 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:30 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:58 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 17:10 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 01:26 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 17:54 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 10:42 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-26 03:06 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 11:25 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-26 03:33 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 12:56 +0100
                Re: Lets put it another way Vidar Hasfjord <vattilah-groups@yahoo.co.uk> - 2011-05-25 16:09 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:20 +0100
                Re: Lets put it another way "Joel C. Salomon" <joelcsalomon@gmail.com> - 2011-05-25 13:56 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:18 +0100
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 12:45 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 13:47 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:03 +0100
          Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 14:32 +0100
            Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-24 14:16 -0700
              Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 00:00 +0100
    Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 10:20 +0100
      Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-24 22:27 +1200
        Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 13:58 +0100
          Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-25 07:36 +1200
            Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-24 21:11 +0100
              Re: Lets put it another way Oliver Jackson <chexmofo@hotmail.com> - 2011-05-24 16:04 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 11:27 +0100
              Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-25 12:03 +1200
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 11:13 +0100
                Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 09:19 +1200
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 22:39 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 14:45 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:01 +0100
                Re: Lets put it another way Leigh Johnston <leigh@i42.co.uk> - 2011-05-25 22:48 +0100
                Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 09:57 +1200
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:09 +0100
                Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 10:17 +1200
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:56 +0100
                Re: Lets put it another way Ian Collins <ian-news@hotmail.com> - 2011-05-26 13:04 +1200
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 10:47 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 15:17 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:03 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:14 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 00:32 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 16:39 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 01:18 +0100
                Re: Lets put it another way Joshua Maurice <joshuamaurice@gmail.com> - 2011-05-25 17:52 -0700
                Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 10:53 +0100
  Re: Lets put it another way Vidar Hasfjord <vattilah-groups@yahoo.co.uk> - 2011-05-25 15:31 -0700
    Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-25 23:58 +0100
      Re: Lets put it another way Vidar Hasfjord <vattilah-groups@yahoo.co.uk> - 2011-05-25 16:54 -0700
        Re: Lets put it another way "Paul" <pchristor@yahoo.co.uk> - 2011-05-26 01:00 +0100

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