Re: [boost] Re: physical-quantities

From: Matthias Troyer (troyer_at_[hidden])
Date: 2004-01-09 09:14:20

On Jan 9, 2004, at 8:57 AM, Dan W. wrote:

> Andy Little wrote:
>> my lib makes a point of not changing si OR non-si units unnecessarily 
>> during
>> addition.
>
> Good!
>
> I also have another argument why the dimensional power type should be 
> a template plug-in:
>
>        e^(-j*pi) = 1.0
>
> There may be situations where irrational and imaginary powers are 
> needed, even when the final result is intended to be every-day 
> quantities. Complex powers are not unfathomable.

Sorry, but I do not understand the problem with units in the context of 
this exp() function. Any argument to exp(), log(), sin(), cos() or 
similar functions needs to be a pure dimensionless number. Where is the 
problem here?

Matthias