[boost] Re: physical quantities (was: runtime unit-modifiable ...)

From: Russell Hind (rhind_at_[hidden])
Date: 2004-01-08 03:53:05

David B. Held wrote:
> 
> 3) There is a redundancy to your system which can be good or
> bad.  You shouldn't have to say that m_div_s is a velocity.  On
> the other hand, for very short names, like m or s, spelling out
> the dimension could be useful.  It seems to me that perhaps
> users would typedef the most commonly used units, in which
> case it might not be bad to give them longer names, like so:
> 

I can see that this redundancy may be useful.  We deal sometimes with 
wavenumbers (cm-1) which is actually a frequency (i.e. 100cm-1 == 3THz). 
  I would hope that we could specify these units so that they couldn't 
be converted to a length by inverting the value even though that would 
give units of cm.

Thanks

Russell