Re: [boost] Interest in a clone_ptr class?

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2006-07-06 16:22:20

Peter Dimov wrote:
> Thorsten Ottosen wrote:
> 
> 
>>If you not willing to accept that value-based programming and OO
>>programming are different disciplines, we will never agree on this
>>one. Period.
> 
> 
> Entity/identity-based and value-based are different, no question. What is 
> controversial is your claim that the mere presence of a virtual function by 
> necessity implies that the identity of the object is important (as opposed 
> to its value).

I think I'm merely saying value-sematics are not the most important to 
worry about, even for shape objects.

> To give an example, in the texbook OO hierarchy Shape -> Circle, Square, ... 
> the identities of the objects play no role, they are pure values. You can 
> copy a collection of shapes and you'll have a perfect replica of the 
> original. 

Sure, and ptr_container also allows you to copy the collection, albeit
a little less convenient than with operator=().

-Thorsten