Re: [boost] An attempt to generalize the Pimpl idom with properly separated interface and implementation

From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2007-10-05 13:20:11

Vladimir Batov wrote:
> Given I've been using this Pimpl idiom quite extensively lately [...]
> 
> class Test
> {
>     public:
> 
>     Test (int);
>     Test (int, int);
> 
>     int get() const;
> 
>     bool operator==(Test const& p) const { return impl_ == p.impl_; }
>     bool operator!=(Test const& p) const { return impl_ != p.impl_; }
>     operator bool() const { return implementation_; }
> 
>     void swap(pimpl& that) { impl_.swap(that.impl_); }
> 
>     private:
> 
>     struct Internal;
>     boost::shared_ptr<Internal> impl_;

Why use a boost::shared_ptr? You want your implementation details to be 
shared across all 'Test's?
What you need is more like a deep-copying smart pointer.