Re: [boost] [Review] Quantitative Units library review begins today March 26

From: Eric Lemings (lemings_at_[hidden])
Date: 2007-03-28 13:12:44

> -----Original Message-----
> From: boost-bounces_at_[hidden] 
> [mailto:boost-bounces_at_[hidden]] On Behalf Of Steven Watanabe
> Sent: Wednesday, March 28, 2007 11:05 AM
> To: boost_at_[hidden]
> Subject: Re: [boost] [Review] Quantitative Units library 
> review begins today March 26
> 
...
> Allowing conversion between units having different dimensions 
> and allowing fundamental units whose dimensions are not 
> fundamental e.g. quarts for volume is very very difficult to 
> implement.  Off hand, I think that it requires defining some 
> special system (probably SI) and converting through that system.

Ah.  Our first communication breakdown.  :)

By "system", I'm talking about a set of units regardless of their
respective dimensions.  For example, foot and ounce are two units
of the "Imperial" system of units.  Meter and gram are two units
of the SI system of units.

What you are talking about are compatible units.  That is, units
of the same dimension whose measured values can be converted from
one to the other.

Just to clear things up a bit...

Eric.