Re: Using operators.hpp

From: Daryle Walker (darylew_at_[hidden])
Date: 2001-10-31 17:42:33

on 10/31/01 10:23 AM, Bill Seymour at bill-at-the-office_at_[hidden] wrote:

> Last weekend in Redmond, Beman told me that one objection to the fixed-point
> decimal library was that I hadn't used operators.hpp.  I said that I had
> looked at it once and my first impression was that it offered more pain than
> gain; but I promised to look at it again.
> 
> OK, I'm trying to apply this to the decimal<> class; and so far I've written:
> 
> template<int Precision = 0>
> class decimal
> : unit_steppable< decimal<Precision>
> , arithmetic2< decimal<Precision>, int
> , arithmetic2< decimal<Precision>, decimal<?>
> , arithmetic2< decimal<Precision>, rounding_proxy< decimal<?> >
>   > > > > 
> 
> Note the two occurrances of decimal<?>.  I don't understand how to say
> "decimal<some other precision>" here.  What am I missing?

I don't think you can.  Those second parameters only take a single type, not
a family of types.  You have to do relations between other decimal types or
rounding proxies manually with member and function templates.

-- 
Daryle Walker
Mac, Internet, and Video Game Junkie
darylew AT mac DOT com