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Programming > C++ Moderated > Re: Destructor ...
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Re: Destructor not called with forward declaration instead of include

by Triple-DES <DenPlettfrie@[EMAIL PROTECTED] > Apr 23, 2008 at 01:13 PM

On 22 Apr, 19:07, marlow.and...@[EMAIL PROTECTED]
 wrote:

[snip]
> The type must be known for delete blah to be compilable.

The code is not ill-formed, merely UB, so a conforming compiler could
compile the code without warning.

> Hence your code will not compile. Here's the error I got from gcc:
>
> BigClazz.cpp: In destructor ‘BigClazz::~BigClazz()’:
> BigClazz.cpp:5: warning: possible problem detected in invocation of
> delete operator:
> BigClazz.cpp:5: warning: invalid use of undefined type ‘struct Clazz’
> BigClazz.h:1: warning: forward declaration of ‘struct Clazz’
> BigClazz.cpp:5: note: neither the destructor nor the class-specific
> operator delete will be called, even if they are declared when the
> class is defined.
>
> Says it all, I think.
> You wouldn't be using a Micro$oft compiler by any chance?

warning C4150: deletion of pointer to incomplete type 'Clazz'; no
destructor called

Says it all, I think, and in just one line :)

DP


-- 
      [ See http://www.gotw.ca/resources/clcm.htm
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 16 Posts in Topic:
Destructor not called with forward declaration instead of includ
internetpet <internetp  2008-04-21 20:43:18 
Re: Destructor not called with forward declaration instead of in
=?ISO-8859-1?Q?Daniel_Kr=  2008-04-22 10:54:58 
Re: Destructor not called with forward declaration instead of in
Triple-DES <DenPlettfr  2008-04-22 10:52:59 
Re: Destructor not called with forward declaration instead of in
Travis Vitek <travis.v  2008-04-22 10:53:33 
Re: Destructor not called with forward declaration instead of in
marlow.andrew@[EMAIL PROT  2008-04-22 11:07:11 
Re: Destructor not called with forward declaration instead of in
Maciej Sobczak <see.my  2008-04-22 11:13:17 
Re: Destructor not called with forward declaration instead of in
alasham.said@[EMAIL PROTE  2008-04-22 11:18:19 
Re: Destructor not called with forward declaration instead of in
Brendan <catphive@[EMA  2008-04-22 11:13:28 
Re: Destructor not called with forward declaration instead of in
nickf3 <nickf3@[EMAIL   2008-04-22 11:43:17 
Re: Destructor not called with forward declaration instead of in
Alan Johnson <awjcs@[E  2008-04-22 11:43:18 
Re: Destructor not called with forward declaration instead of in
peter koch larsen <pet  2008-04-22 15:22:47 
Re: Destructor not called with forward declaration instead of in
Vidar Hasfjord <vattil  2008-04-23 13:13:18 
Re: Destructor not called with forward declaration instead of in
Triple-DES <DenPlettfr  2008-04-23 13:13:15 
Re: Destructor not called with forward declaration instead of in
Seungbeom Kim <musiphi  2008-04-26 08:42:07 
Re: Destructor not called with forward declaration instead of in
Carl Barron <cbarron41  2008-04-27 07:01:39 
Re: Destructor not called with forward declaration instead of in
Vidar Hasfjord <vattil  2008-04-27 07:44:19 

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tan12V112 Fri Jul 25 21:56:22 CDT 2008.