I am having trouble converting from one derived_dimension to another across systems (imperial to metric). I'd like to convert, say, lb/in to, say, kg/m. I thought I would do the following but get a compiler error #:
*.h--------------------------------------------------------------------------------
namespace dimensional_analysis {
namespace lineal_force { //lb/in
typedef boost::units::derived_dimension<
boost::units::us::pound_force_base_unit, 1,
boost::units::us::inch_base_unit, -1
>::type lb_per_inch_dimension;
typedef boost::units::unit<
lb_per_inch_dimension,
dimensional_analysis::lengths::ip_system
> lb_per_inch_unit;
typedef boost::units::quantity lb_per_inch_quantity;
BOOST_UNITS_STATIC_CONSTANT(lbpin, lb_per_inch_quantity);
//kg/m
typedef boost::units::derived_dimension<
boost::units::si::kilogram_base_unit, 1,
boost::units::si::meter_base_unit, -1
>::type kg_per_meter_dimension;
typedef boost::units::unit<
kg_per_meter_dimension,
boost::units::si::system
> kg_per_meter_unit;
typedef boost::units::quantity kg_per_meter_unit_quantity;
BOOST_UNITS_STATIC_CONSTANT(kgpm, kg_per_meter_unit_quantity);
}//lineal_force
}//dimensional_analysis
*.cp ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
//Do I need these?
BOOST_UNITS_DEFINE_CONVERSION_FACTOR(dimensional_analysis::lineal_force::kg_per_meter_unit, dimensional_analysis::lineal_force::lb_per_inch_unit, double, 0.0559974); // exact conversion
BOOST_UNITS_DEFAULT_CONVERSION(dimensional_analysis::lineal_force::kg_per_meter_unit, dimensional_analysis::lineal_force::lb_per_inch_unit);
//This does not compile#
const auto conv_factor_try0 = conversion_factor(dimensional_analysis::lineal_force::kg_per_meter_unit::unit_type(), dimensional_analysis::lineal_force::lb_per_inch_unit::unit_type());
# *\boost_1_68_0\boost\units\detail\conversion_impl.hpp(340): error C2672: 'conversion_factor': no matching overloaded function found (compiling source file...*.cpp)
Any help is appreciated
