Re: [Boost-users] pimpl and Qt

From: Vladimir Krasovsky (vkrasovsky_at_[hidden])
Date: 2005-05-18 10:10:19

Hello Filipe,

Tuesday, May 17, 2005, 5:46:27 PM, you wrote:

> Hi!

> I'm having trouble implementing Pimpl idiom with Qt.

> If I remove Q_OBJECT macro or add a destructor the code compiles fine. I don't
> have a problem with shared_ptr, only with scoped_ptr.

If you wish to use scoped_ptr as a pointer to implementation you should
always define (in .cpp file) destructor for outer class even if it is empty
destructor. This allows compiler to generate (instantiate) proper destructor for
shared_ptr<YourImplementationClass>. Otherwise it instantiates such
destructor in scope where YourImplementationClass is incomplete and
you receive said errors. It is normal common practice to define empty
constructor in such cases.

shared_ptr does not have problem like this, but it is more
"heavyweight".

-- 
Best regards,
 Vladimir                            mailto:vkrasovsky_at_[hidden]