[boost] Re: Dimensional Analysis Interest?

From: David Abrahams (dave_at_[hidden])
Date: 2003-10-16 07:26:44

Paul A. Bristow wrote:

> |
> | The slides have examples where the units are from physics.  So you
> | represent a number's units as a n-tuple of exponents with each
> | exponent corresponding to one of the fundamental SI units.
> | Arithmetic operations on numbers with these units have well
> | defined rules to compute the resulting units.
> |
> | If the semantics of the exponents in the n-tuple are user defined, ...
> <snipped>
> 
> Would an example here be if the exponents in the n-tuple were of type rational
> rather than type integer?

Well, you can make "compile-time rationals", but they can't look like 
our Boost rational class because the numerator and denominator have to 
be part of the type.