Re: [boost] units: review

From: Matthias Schabel (boost_at_[hidden])
Date: 2007-03-29 14:58:09

> While quantity_reinterpret_cast may not be perfectly analogous to
> reinterpret_cast, it represents the reinterpretation of a raw number
> as being of a different type, and so I think it's a pretty good name.
> Just as importantly, I can't think of anything better.  Do you have
> any other ideas?  quantity_unsafe_cast? quantity_arbitrary_cast? :)

Sorry, I think I muddied the waters here - I agree that  
quantity_reinterpret_cast should be reserved for those cases where  
access to the raw data is necessary. I was just saying that we can  
write things like

quantity<SI::length,double>	q;
quantity<SI::length,int>		r;
quantity<CGS::length,double> s;
quantity<CGS::length,int>		t;

q = quantity<SI::length,double>(r);
q = quantity<SI::length,double>(s);
q = quantity<SI::length,double>(t);

already, so the only non-degenerate use case of quantity_cast is to  
take a raw value and return a quantity:

q = quantity_cast< quantity<SI::length,double> >(1.5);

Matthias