Hugo wrote: [snip] > I have found in the past that there is a need to > distinguish between dimension handling and unit handling. > > In the case of a physical calculation, I usually ensure that > the code works with a self consistent set of units, and thus > only need dimensionality, compile time, code. > > Units then become important only in the user interface, and > I have a list of the units used in the physical calculation > for each dimension. > > This is obviously only one way of using dimensions and units, > but I think an important one. The usual exception to the > above is for money where you are working with multiple currencies.
One could actually regard the different currencies as realizing different dimensions. After all, a dollar bill is quite different from a British pound bill, although one can apply a certain process (exchange...) to convert between these dimensions. For some ideas about how one can implement the dimension/unit framework, look at the Java-based system Frink (http://futureboy.homeip.net/frinkdocs/) implemented by Alan Eliasen. /David _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
