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Groups > comp.lang.c++ > #3107
| From | Ruben Safir <ruben@mrbrklyn.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Destructors can copying objects |
| Date | 2011-04-04 21:05 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <indbq3$r87$2@reader1.panix.com> (permalink) |
| References | <in76i3$105$2@reader1.panix.com> <incf69$9fr$1@dont-email.me> |
On Mon, 04 Apr 2011 12:56:41 +0000, Yannick Tremblay wrote:
> On 2011-04-02, Ruben Safir <ruben@mrbrklyn.com> wrote:
>>
>> I am creating a linked link program which created a segmentation fault
>> and a core at the end of the program. The program is trying to delete
>> an already deleted object, and I can't seem to protect my program from
>> this. I fixed the problem by sending an object to a function by
>> reference rather than by value, but I'm not satisfied with the
>> solution.
>>
>> The list has node objects
>>
>> namespace chainlist {
>>
>>
>> /*
>> *
>>=====================================================================
>> * Class: Node
>> * Description: This is a node in the "List" Link List *
>>====================================================================
>> */
>>
>> template < class unk >
>> class Node
>> {
>> public:
>>
>> // ==================== LIFECYCLE
>> ======================================= /* constructor */
>> Node<unk>( unk value, Node<unk> *item_to_link_to = 0); Node ( const
>> Node &other ); /* copy constructor - Need to write this! */
>
> Stop here!
>
> Could you clarify to us why the following comments is there: /* copy
> constructor - Need to write this! */
>
>
> Yannick
Because I haven't written it yet.
The purpose of the question is to understand what is happening, not to necessarily
fix the program. This is not a homework assignment with a deadline. I just want to
have a better understanding of why the destructor caused a double delete.
The entire exercise I believe is in here
http://www.nylxs.com/docs/workshops/linklist_templates_mysql/
Ruben
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Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-02 12:58 +0000
Re: Destructors can copying objects Volker Lukas <vlukas@gmx.de> - 2011-04-02 15:29 +0200
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-03 02:59 +0000
Re: Destructors can copying objects "Balog Pal" <pasa@lib.hu> - 2011-04-03 11:32 +0200
Re: Destructors can copying objects Leigh Johnston <leigh@i42.co.uk> - 2011-04-03 12:29 +0100
Re: Destructors can copying objects Bart van Ingen Schenau <bart@ingen.ddns.info> - 2011-04-04 13:43 +0200
Re: Destructors can copying objects Michael Doubez <michael.doubez@free.fr> - 2011-04-05 01:26 -0700
Re: Destructors can copying objects Joshua Maurice <joshuamaurice@gmail.com> - 2011-04-04 14:03 -0700
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 21:10 +0000
Re: Destructors can copying objects Leigh Johnston <leigh@i42.co.uk> - 2011-04-04 22:28 +0100
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 21:07 +0000
Re: Destructors can copying objects Leigh Johnston <leigh@i42.co.uk> - 2011-04-04 22:31 +0100
Re: Destructors can copying objects Leigh Johnston <leigh@i42.co.uk> - 2011-04-04 22:43 +0100
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 22:38 +0000
Re: Destructors can copying objects Leigh Johnston <leigh@i42.co.uk> - 2011-04-04 23:42 +0100
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 22:54 +0000
Re: Destructors can copying objects James Kanze <james.kanze@gmail.com> - 2011-04-03 10:07 -0700
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 21:14 +0000
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 21:17 +0000
Re: Destructors can copying objects LR <lruss@superlink.net> - 2011-04-05 01:52 -0400
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-03 03:08 +0000
Re: Destructors can copying objects Paavo Helde <myfirstname@osa.pri.ee> - 2011-04-03 02:11 -0500
Re: Destructors can copying objects Volker Lukas <vlukas@gmx.de> - 2011-04-03 12:02 +0200
Re: Destructors can copying objects Peter Remmers <p.remmers@expires-2011-04-30.arcornews.de> - 2011-04-03 12:14 +0200
Re: Destructors can copying objects Roberto Waltman <usenet@rwaltman.com> - 2011-04-03 18:16 -0400
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-15 23:06 +0000
Re: Destructors can copying objects LR <lruss@superlink.net> - 2011-04-15 19:19 -0400
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-15 23:03 +0000
Re: Destructors can copying objects "Alf P. Steinbach /Usenet" <alf.p.steinbach+usenet@gmail.com> - 2011-04-16 01:47 +0200
Re: Destructors can copying objects Peter Remmers <p.remmers@expires-2011-04-30.arcornews.de> - 2011-04-16 13:00 +0200
Re: Destructors can copying objects "Alf P. Steinbach /Usenet" <alf.p.steinbach+usenet@gmail.com> - 2011-04-16 15:57 +0200
Re: Destructors can copying objects LR <lruss@superlink.net> - 2011-04-02 09:51 -0400
Re: Destructors can copying objects Yannick Tremblay <yannick@tremnblay.co.uk> - 2011-04-04 12:56 +0000
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-04 21:05 +0000
Re: Destructors can copying objects Paavo Helde <myfirstname@osa.pri.ee> - 2011-04-04 21:56 -0500
Re: Destructors can copying objects Yannick Tremblay <yannick@tremnblay.co.uk> - 2011-04-05 11:36 +0000
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-05 15:40 +0000
Re: Destructors can copying objects Sana <sanatakos@gmail.com> - 2011-04-05 10:11 -0700
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-05 20:28 +0000
Re: Destructors can copying objects Yannick Tremblay <yannick@tremnblay.co.uk> - 2011-04-06 11:12 +0000
Re: Destructors can copying objects drew@furrfu.invalid (Drew Lawson) - 2011-04-05 13:02 +0000
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-05 15:51 +0000
Re: Destructors can copying objects drew@furrfu.invalid (Drew Lawson) - 2011-04-05 17:47 +0000
Re: Destructors can copying objects Ruben Safir <ruben@mrbrklyn.com> - 2011-04-05 20:25 +0000
Re: Destructors can copying objects drew@furrfu.invalid (Drew Lawson) - 2011-04-05 20:37 +0000
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