Access constant reference

[Socob]

As far as I can tell, the “reference” that’s defined for a constant and printed in the show method, e. g.

julia> PhysicalConstants.CODATA2018.G
Newtonian constant of gravitation (G)
Value                         = 6.6743e-11 m^3 kg^-1 s^-2
Standard uncertainty          = 1.5e-15 m^3 kg^-1 s^-2
Relative standard uncertainty = 2.2e-5
Reference                     = CODATA 2018

is not available anywhere and only exists within that show method. It would be nice to have a way to access that separately, e. g. via a newly defined function.

[giordano]

Agreed, PR for an accessor function welcome! Side note, in hindsight I'm not particularly happy with the design of having singletons for which lots of magic methods are defined (which is totally inspired by Base.@irrational), using proper structures would be cleaner (and also better for time-to-first-print a constant).

[Socob]

PR created!

I don’t know if there are any drawbacks associated with having more information stored in a struct itself, but for now I didn’t opt to change the entire structure of the package 😉

[giordano]

Yeah, no worries, that's a larger undertake