[Boost-users] [units] unit conversion on construction in relation to argument passing

Hi, Boost.Units offers automatic conversion (if conversion factor is defined) on construction of variables: quantitycgs::lengh A = 4.*cgs::centimeter; quantitysi::length a(A); nice! But for some reason I believe this would work for argument functions double f(quantitysi::length v){ return 1.;} ... quantitycgs::lengh A = 4.*cgs::centimeter f(A); // doesn't work! not matching function why is this? isn't the argument of the call a sort of construction argument for the function argument, or is more like a plain assignment. Is there a way to force the automatic conversion of the function call. Or I am forced to use this other long call? f(quantitysi::length(A)); Thanks Alfredo Full code: #include #include double f(quantitysi::length v){ return 1.; } int main(){ quantitycgs::length A(4.*cgs::centimeter); f(A); //not matching function return 0; }