Hello all, please excuse the weird subject line. I have just introduced boost units as length quantity for vectors into my project here. What previously was: typedef boost::qvm::vec<double, 3> vec3; is now: typedef boost::units::quantity<length, double> qlength; typedef boost::qvm::vec<qlength, 3> vec3; Which seems to work OK so far, I'm not done testing. While converting all my unit tests I came to wonder is how this is best adopted. I have lots of lines like: vec3 v = get_some_value(); and then I test the individual component values like this: BOOST_CHECK_CLOSE(X(v), 42.0, 0.001); // check for length of 42 meters Now this would have to be rewritten to: BOOST_CHECK_CLOSE(X(v).value(), 42.0, 0.001); But doing this, I imply the length is in meters, right? Doesn't that defeat the purpose a little? I feel this would be better: BOOST_CHECK_CLOSE(X(v), 42.0 * meters, 0.001); but the Macro won't accept this as this is not a floating point type anymore. Does anybody have some hint as to how this is best addressed while still have maximum readability? All my best... Stephan