Re: [boost] Interest in dimension/unit-checking library?

From: Deane Yang (deane_yang_at_[hidden])
Date: 2005-10-24 08:08:30

I just want to say that I agree with everything Paul says below.

Paul A Bristow wrote:
> | -----Original Message-----
> | [mailto:boost-bounces_at_[hidden]] On Behalf Of Matt Calabrese
> | Sent: 21 October 2005 18:53
> | To: boost_at_[hidden]
> | Subject: Re: [boost] Interest in dimension/unit-checking library?
> | 
> | On 10/21/05, Deane Yang <deane_yang_at_[hidden]> wrote:
> | 
> | > But wouldn't it make sense to develop a core 
> | dimensions/units library
> | > without any predefined dimensions in it and develop the SI 
> | quantities
> | > library as a layer above that?
> | 
> | 
> | That's exactly what my library is. It's a general physical quantities
> | library with SI just also provided as a set of classifications and units
> | coupled with the library.
> 
> I've read this discussion with renewed interest.
> 
> This sounds like a good basis to work on, potentially meeting all the
> requirements from the feet-on-the-ground-SI group (almost certainly by far
> the largest) but not excluding the head-in-the-astronomicals group (whose
> distances overflow SI units!), nor excluding the monetarily-important
> finance groups, not to mention the ones we have yet to conceive.  
> 
> I worry that the compile times and complexity will outstrip both hardware
> and compilers, but the only way to find out is to try it.  So I would
> encourage Matt to continue his efforts in this direction.
> 
> Paul
> 
> PS My gut instinct is to enforce explicit conversions - mainly as a matter
> of documenting intent, but I am just about persuaded that implicit can be
> OK, provided it is loseless.
> If we can have a way of highlighting when implicit conversion takes place,
> that could make everyone happier.
> 
> Paul A Bristow
> Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB
> Phone and SMS text [phone], Mobile and SMS text [phone]
> mailto: pbristow_at_[hidden]  www.hetp.u-net.com
> 
> 
> 
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