Re: [boost] Infinite precision integer draft

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,

No.

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).

        Doug