Re: [Boost-users] is_polymorphic addition please

From: Peter Dimov (pdimov_at_[hidden])
Date: 2006-03-02 16:23:59

Ray Hilton wrote:
>> I'm not entirely sure what you mean here: do you mean "if class X
>> is only polymorphic because of base class Y, then don't count X as
>> polymorphic"?
>
>> If so then I don't see any way to implement that, anyone else?
>
>> John.
>
> Yes, that is what i meant. A lot of stuff  that is inherited will
> never be used polymorphically, like boost::noncopyable,
> binary_funciton<> type classes that only bring in typedefs etc.
> It would we be of great help im sure.

Neither of these will make your class polymorphic; in this context (and in 
the C++ standard) 'polymorphic' means 'has at least one virtual function'.