This sounds good to me. Just one more enhancement, please. Given arithmetic types T1 and T2, dimension types X1 and X2, and an operator, then there are (user-defined) rules to determine result types T3 and X3 so that <T1, X1> op <T2,X2> returns a <T3,X3> A framework for doing this would be very useful to me. Matt Austern wrote:
There's actually something even lower level than a dimension library. In essence, what we've got is: - We're generalizing the notion of an arithmetic type T to a type of the form <T,X>, where X is some sort of tag. - For any X1 and X2 and any arithmetic operation 'op', we have rules for whether <T,X1> op <T,X2> is well defined. If it is then the result is tagged as <T,X3>, and we have rules to determine X3 in terms of X1, X2, and op.
All of the knowledge about how to represent dimensional systems (mpl vectors, compile-time fractions, etc.) is higher level than this.
--Matt _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost