Does not seem to work on symbols defined outside `Unitful.jl`, e.g, `UnitfulAtomic.jl`

[singularitti]

For example,

julia> string(1u"bohr")
"1a₀"

julia> Unitful.uparse(string(1u"bohr"); unit_context=[Unitful,UnitfulAtomic])
ERROR: ArgumentError: Symbol a₀ could not be found in unit modules Module[Unitful, UnitfulAtomic]
Stacktrace:
 [1] lookup_units(unitmods::Vector{Module}, sym::Symbol)
   @ Unitful ~/.julia/packages/Unitful/SUQzL/src/user.jl:707
 [2] lookup_units(unitmods::Vector{Module}, ex::Expr)
   @ Unitful ~/.julia/packages/Unitful/SUQzL/src/user.jl:674
 [3] uparse(str::String; unit_context::Vector{Module})
   @ Unitful ~/.julia/packages/Unitful/SUQzL/src/user.jl:662
 [4] top-level scope
   @ REPL[20]:1

julia> versioninfo()
Julia Version 1.8.1
Commit afb6c60d69a (2022-09-06 15:09 UTC)

[michikawa07]

I could see the same error now.
The problem does not seem to be that it is outside defined, but that the variable name and the display name (maybe return value of abbr(x)) are different.

julia> uparse(string(1u"μ_N"); unit_context=[Unitful,UnitfulAtomic])
1 μ_N

UnitfulAtomic.bohr is defined as variable a0_au, which is different from the display name a₀.
I think I can fix this problem, so I'll get to it.
Thank you for your report. It is very helpful.

[michikawa07]

Although it is a rough implementation, I have added support for units such as u"bohr", where the abbr and variable symbols are different.
I hope you will check it.

Checks if abbr(x) can parse to the original x in the Unitful and Unitful.unitmodules namespace.
If not, it searches for a symbol that can be parsed into the original x.
If the symbol is found in the namespase, it returns it; otherwise, it returns a warning.

julia> using UnitfulAtomic

julia> str = string(1.0u"bohr")
┌ Warning: A symbol to be parsed into "a₀" could not be found in the given "Module[Unitful]"
└ @ UnitfulParsableString
"1.0a₀"

julia> uparse(str, unit_context=[Unitful, UnitfulAtomic])
ERROR: ArgumentError: Symbol a₀ could not be found in unit modules Module[Unitful, UnitfulAtomic]
Stacktrace:
 [1] lookup_units(unitmods::Vector{Module}, sym::Symbol)
   @ Unitful C:\Users\michi\.julia\packages\Unitful\SUQzL\src\user.jl:707
 [2] lookup_units(unitmods::Vector{Module}, ex::Expr)
   @ Unitful C:\Users\michi\.julia\packages\Unitful\SUQzL\src\user.jl:674
 [3] uparse(str::String; unit_context::Vector{Module})
   @ Unitful C:\Users\michi\.julia\packages\Unitful\SUQzL\src\user.jl:662
 [4] top-level scope
   @ REPL[117]:1

In the following example, Unitful and UnitfulAtomic modules are used to determine if parsing is possible.
UnitfulAtomic is automatically registered to Unitful.unitmodules.

julia> using UnitfulAtomic

julia> str = string(1.0u"bohr")
"1.0bohr"

julia> uparse(str, unit_context=[Unitful, UnitfulAtomic])
1.0 a₀