"Paul A. Bristow" <boost@[...].com>  wrote in message
news:AHEJIHEOOOBMJPAGPLIPKELKEGAA.boost@[...]..
>  I hate to be negative about your proposal (unlike many Boosters who seem
to take
>  great delight in shooting/shouting anything down) but having glanced at
the code
>  examples, I really don't think that this is the right way to go.  I still
think
>  that everything should be held internally in SI units - now that double
has
>  enough range to cover almost everyones needs.

"Almost everyone" includes ... well you presumably.
As usual embedded developers are ignored .
(In embedded its relatively common to scale during a calc to prevent
overflow. That is sometimes  more important than absolute accuracy)

  I'm worried about conversion
>  loss - your first example warns of the danger.

I guess I should tell users that if they dont use SI units they'd better go
elsewhere because if we convert we'll lose the 32nd decimal place in the
conversion ?

 And I am worried about the
>  expansion to other all the types of units - many are unecessary (feet
even!) but
>  widely used.

In the U.K.... but not Cumbria I guess
every road sign is in ...er. miles per hour. .. So you dont do H.M contracts
for political reaasons :-)
head for Europe and you have k.m.h... Ok no problem avoid European contracts
in case you encounter these unnecessary units.
Many Americans use imperial units... just stupid I guess :-(
In the butcher 90% of people still ask for a pound of beef. no till/accounts
contracts.
Every wood yard worker must be able convert feet to metres....

Unit conversion is a real problem now!

>  | http://www.servocomm.freeserve.co.uk/Cpp/physical_quantity/index.html

regards
Andy Little
andy@[...].uk



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