[Boost-users] Re: Re: Re: pimpl and boost

From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2005-04-28 11:11:24

David Gruener wrote:
> Jeff Flinn wrote:
>> A::A( const A::A& a ):mPimpl( new Impl( *a.mPimpl ) ){}
>> and don't forget operator=;
>> You get the deep copy semantics that your looking for don't you?
>
> Then, whats the benefit here over using a plain pointer
> or std::auto_ptr? The goal of using a smart pointer with
> deep copy semantics is that you *dont* have to write
> those stuff by yourself.

Well, you don't have to worry about the destructor with shared_ptr or 
scoped_ptr.

It's your call as to which to use so that you get the appropriate semantics.

>> I'd think scoped_ptr works above as well.
>
> Again, scoped_ptr is noncopyable, and see above. :]

You're not copying the pointer, you're copying the pointee with deep copy 
semantics.

Jeff Flinn
Applied Dynamics, International