[Boost-users] [units] newbie : plane_angle

Hi, I just discover boost::units and I want to know how it works in this case : quantity<si::plane_angle> angle(45 * degree); When the constructor is called, is the argument converted in radian or not ? Moreover, it is possible to have : quantity<??::plane_angle> angle(45 * degree); angle += pi / 4 * radian; cout << angle << endl; cout << quantity<degree::plane_angle>(angle) << endl; cout << quantity<radian::plane_angle>(angle) << endl; cout << angle.value<degree>() << endl; cout << angle.value<radian>() << endl; output : 45 deg + pi / 4 rad 90 deg pi / 2 rad 90 1.57079632679 Thanks. -- Damien R