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From: Rob Stewart (stewart_at_[hidden])
Date: 2005-04-27 12:21:44

From: "Thorsten Ottosen" <nesotto_at_[hidden]>
> "David Abrahams" <dave_at_[hidden]> wrote in message
> | "Thorsten Ottosen" <nesotto_at_[hidden]> writes:
> |
> | > A "value object" implies something that behaves as an int; a
> | > "polymophic object" implies something that needs to allocated
> | > dynamically and which has virtual functions.
> |
> | A polymorphic object doesn't need to be allocated dynamically.
> if you want it to act polymophic you have to.

Pass it to a function taking a reference to a base class; it acts
polymorphically. Where the object is allocated is orthogonal.

> | > trying to make a polymorphic object behave like a value object is
> | > confusing a best.
> |
> | Who does it confuse? Pimpl is a commonly used and well understood
> | pattern for doing just that.
> Pimpl is an ugly hack for compilation firewalls.

Regardless of your opinion of the technique, Dave's statement

Rob Stewart                           stewart_at_[hidden]
Software Engineer           
Susquehanna International Group, LLP  using std::disclaimer;

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