[boost] Re: runtime unit-modifiablephysical-quantitiesusingpqs1-00-01

From: Dan W. (danw_at_[hidden])
Date: 2004-01-06 11:17:59

I was just thinking, it might be useful to have a way of specifying 
range limits to quantities. For instance, degrees Celsius don't make 
much sense below -273. Degrees Kelvin are never negative. Speed can't go 
beyond C (unless we're programming a StarTrek game, but then we could 
have a Warp unit). Tensile strength is never negative, and so on.

Just the ability to set limits would be good to have, though; NOT the 
limits themselves.

And they would only be checked by default when initializing from 
constants. Run-time verifications should be explicit only, as the values 
can go beyond limits when computing temporaries in long expressions.

Cheers!