Re: [boost] [units] Crazy idea/question

From: Steven Watanabe (steven_at_[hidden])
Date: 2007-02-15 16:35:48

AMDG

Matthias Schabel <boost <at> schabel-family.org> writes:

> 
> 1) The target unit may only have one instance of each tag (no  
> repeated tags with different
> systems). Otherwise, the conversion becomes ambiguous.

If the source has only one instance of each tag
than it should be easy too.

> 
> To do conversion, we'll have to pull out a list of all list elements  
> having a given tag, then
> convert the ones not in the same system as the same tag in the target  
> unit, then merge.
> 
> Anyway, this is probably not interesting to anyone...don't mind my  
> blathering...
> 
> Matthias

A more sophisticated data structure might be
appropriate

dim<
    length_tag,
    mpl::list<
        mpl::pair<SI::system, static_rational<2> >,
        mpl::pair<CGS::system, static_rational<1> >
    >
>

In Christ,
Steven Watanabe