Re: [boost] mcs::units informal review request

<snip>

and the FPType default to double? (Since nearly all work will be done using double, it would be nice to avoid typing/seeing double so often in the code. It would be much nicer to write

quantity<length> L = 2.0 * meters; // quantity of length

to get double?

quantity<float, length> L = 2.0 * meters; // quantity of length

to get float, but order makes this impossible.

Not impossible, just add another layer of indirection: template<typename T1,typename T2> class quantity : public quantity_impl< typename mpl::if_< is_unit<T1>,T2,T1

::type, typename mpl::if_< is_unit<T1>,T1,T2 ::type {};

Peder