Function trussx::length

pub fn length<T>(
    l: T
) -> Quantity<dyn Dimension<L = PInt<UInt<UTerm, B1>>, I = Z0, J = Z0, Kind = dyn Kind + 'static, T = Z0, N = Z0, Th = Z0, M = Z0> + 'static, dyn Units<f64, luminous_intensity = candela, mass = kilogram, length = meter, thermodynamic_temperature = kelvin, electric_current = ampere, amount_of_substance = mole, time = second> + 'static, f64> where
    T: Float, 

A helper function supporting conversion of floating point numbers to meters