Re: [boost] Adobe Source Libraries, GIL, and Boost

From: Gabriel Dos Reis (gdr_at_[hidden])
Date: 2006-07-06 22:24:30

Gennaro Prota <gennaro_prota_at_[hidden]> writes:

[...]

|   template<class T>
|   class final
|   {
|    private:
|    final() { }
|    friend class T;
|   };
| 
| I'd add another base class to this so that the user hadn't to remember
| to write virtual, but that's not the main point. In any case, this
| does not prevent derivation: it prevents *instantiating* any derived
| class (so a derived class which would only have static members... :)).
| 
| It will probably get into boost when "friend class T" will become
| legal; 

     friend T;

has been voted into the current draft of C++, i.e. it is now possible to
declare a template parameter as a friend.  You're right that it is
not widely supported yet.

-- Gaby