// implicit copy constructor value_type conversion
BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::dimensionless,float> E5(E2);
BOOST_UNITS_CHECK_CLOSE(E5.value(), float(E_));
BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::dimensionless,long> E6(E2);
// implicit copy constructor value_type conversion
BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::dimensionless,float> E5(E2);
BOOST_UNITS_CHECK_CLOSE(E5.value(), float(E_));
BOOST_CONSTEXPR_OR_CONST bu::quantity<bu::dimensionless,long> E6(E2);