[boost] Re: Re: boost::noncopyable

From: Maxim Yegorushkin (e-maxim_at_[hidden])
Date: 2004-12-19 09:07:32

Peter Dimov wrote:

> Maxim Yegorushkin wrote:
>>
>> Does it really make any sense making only implementation noncopyable,
>> rather than interface?
>
> This would prevent you from making a copyable implementation of the  
> interface.

No. Deriving from boost::noncopyable only suppress compiler generated copy  
ctor and assignment. You still can define them and make your  
boost::noncopyable successor copyable.

I think I just did not get you right.

>> If you deal with interfaces only it won't save
>> you from errors like this:
>>
>>     std::auto_ptr<Interface> create() { return
>> std::auto_ptr<Interface>(new Implementation); }
>>
>>     void foo()
>>     {
>>         std::auto_ptr<Interface> a(create()), b(create());
>
> Assuming you mean boost::shared_ptr here. auto_ptr doesn't work.

No, I meant std::auto_ptr<>. I overlooked the protected destructor :).

-- 
Maxim Yegorushkin