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From: Douglas Gregor (doug.gregor_at_[hidden])
Date: 2006-05-26 07:59:12

On May 26, 2006, at 7:26 AM, Maarten Kronenburg wrote:
> Every unsigned integer is an integer,


A (signed) integer will have a negation operator, such that 0 - x = -
x, x + -x = 0, etc. An unsigned integer will not have this operator.

> and every modular integer is an integer.
> So therefore in my opinion public inheritance
> can be used.
> Also I think there is no other way of defining
> an unsigned_integer.

Sure there is. What we want is to share nearly all of the
implementation details without providing exactly the same interface.
You can do that with a common base class (that is neither integer
nor unsigned_integer).


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