Re: CAlive special use instance class, called an angel

From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c
Subject	Re: CAlive special use instance class, called an angel
Date	2015-10-31 22:16 +1300
Message-ID	<d9jf7mF2lriU3@mid.individual.net> (permalink)
References	(8 earlier) <d9isclF2lriU1@mid.individual.net> <0ceec23b-f56a-4da4-a3f3-d3babe857849@googlegroups.com> <e664c494-94d5-4b2a-bfc0-efeb2aaf19fa@googlegroups.com> <d9iv9mF2lriU2@mid.individual.net> <31e2c84b-36b4-4db9-863e-5c7cb37bc3b1@googlegroups.com>

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Rick C. Hodgin wrote:
> On Saturday, October 31, 2015 at 12:44:48 AM UTC-4, Ian Collins wrote:
>> Rick C. Hodgin wrote:
>>>
>>> I just tested this in GCC using this simple class, and it behaved
>>> the same way I describe here.  A member function on the deleted class
>>> name which did not access member data worked properly, but access
>>> to its member data signaled a fault.
>>
>> Undefined behaviour can do that, or anything else....
>
> Would it be worth adding a flag to the class, angel, or struct, which
> pads a byte to the data block which indicates if it's operating between
> constructor and destructor?

No because once it has been freed, anything can be written over the 
memory it once occupied.

-- 
Ian Collins

Thread

CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-29 18:18 -0700
  Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-29 18:23 -0700
  Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-30 14:27 +1300
    Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-29 19:18 -0700
      Re: CAlive special use instance class, called an angel Philip Lantz <prl@canterey.us> - 2015-10-29 22:29 -0700
        Re: CAlive special use instance class, called an angel Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-29 22:53 -0700
          Re: CAlive special use instance class, called an angel gazelle@shell.xmission.com (Kenny McCormack) - 2015-10-30 08:40 +0000
            Re: CAlive special use instance class, called an angel Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-30 01:49 -0700
              Re: CAlive special use instance class, called an angel Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 09:15 +0000
              Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 05:37 -0700
                Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 14:25 +0100
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 06:35 -0700
                Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 16:34 +0100
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 08:44 -0700
                Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 13:32 +0000
          Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 05:34 -0700
            Re: CAlive special use instance class, called an angel gazelle@shell.xmission.com (Kenny McCormack) - 2015-10-30 13:13 +0000
              Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 06:25 -0700
            Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-31 11:03 +1300
              Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 15:17 -0700
                Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-31 16:55 +1300
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 21:13 -0700
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 21:36 -0700
                Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-31 17:44 +1300
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 21:53 -0700
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 21:57 -0700
                Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-31 22:16 +1300
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 09:50 -0700
                Re: CAlive special use instance class, called an angel Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-31 01:52 -0700
              Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 22:44 +0000
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 16:14 -0700
                Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 01:03 +0000
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 19:14 -0700
                Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 11:56 +0000
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 09:55 -0700
                Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 20:17 +0000
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 14:27 -0700
                Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 22:38 +0000
                Re: CAlive special use instance class, called an angel Richard Damon <Richard@Damon-Family.org> - 2015-10-31 10:44 -0400
                Re: CAlive special use instance class, called an angel Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-31 12:16 -0700
                Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-31 13:13 +1300
                Re: CAlive special use instance class, called an angel James Kuyper <jameskuyper@verizon.net> - 2015-10-30 22:17 -0400
                Re: CAlive special use instance class, called an angel James Kuyper <jameskuyper@verizon.net> - 2015-10-30 22:31 -0400
        Re: CAlive special use instance class, called an angel Philip Lantz <prl@canterey.us> - 2015-10-30 01:42 -0700
      Re: CAlive special use instance class, called an angel Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 09:38 +0000
        Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 04:35 -0700
          Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 14:10 +0100
            Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 06:21 -0700
              Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 16:43 +0100
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 08:55 -0700
                Re: CAlive special use instance class, called an angel Ian Collins <ian-news@hotmail.com> - 2015-10-31 11:09 +1300
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 15:19 -0700
                Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-11-01 00:47 +0100
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-31 17:24 -0700
                Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-11-01 23:39 +0100
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 16:50 -0800
                Re: CAlive special use instance class, called an angel Philip Lantz <prl@canterey.us> - 2015-11-01 23:22 -0800
                Re: CAlive special use instance class, called an angel Bartc <bc@freeuk.com> - 2015-11-02 13:54 +0000
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-02 06:23 -0800
                Re: CAlive special use instance class, called an angel supercat@casperkitty.com - 2015-11-01 18:46 -0800
            Re: CAlive special use instance class, called an angel Bartc <bc@freeuk.com> - 2015-10-30 13:55 +0000
  Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 10:16 +0100
    Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 05:39 -0700
      Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 14:38 +0100
        Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 06:59 -0700
          Re: CAlive special use instance class, called an angel Bartc <bc@freeuk.com> - 2015-10-30 14:41 +0000
            Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 08:31 -0700
            Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 08:38 -0700
            Re: CAlive special use instance class, called an angel asetofsymbols@gmail.com - 2015-10-30 08:39 -0700
              Re: CAlive special use instance class, called an angel supercat@casperkitty.com - 2015-10-30 15:20 -0700
          Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-10-30 16:48 +0100
            Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-10-30 09:07 -0700
              Re: CAlive special use instance class, called an angel David Brown <david.brown@hesbynett.no> - 2015-11-01 14:53 +0100
                Re: CAlive special use instance class, called an angel Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-01 06:12 -0800
                Re: CAlive special use instance class, called an angel Bartc <bc@freeuk.com> - 2015-11-02 14:16 +0000
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 06:25 -0800
                CLC as a dating site (Was: CAlive special use instance class, called an angel) gazelle@shell.xmission.com (Kenny McCormack) - 2015-11-01 14:33 +0000
                Re: CLC as a dating site (Was: CAlive special use instance class, called an angel) "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 06:45 -0800
                Re: CAlive special use instance class, called an angel "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2015-11-01 07:53 -0800
                Using CLC for crowdsourcing (Was: CAlive special use instance class, called an angel) gazelle@shell.xmission.com (Kenny McCormack) - 2015-11-01 15:56 +0000

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