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juliafield

What exception does getfield throw?

What exception does the following piece of code throw?

getfield(nothing, :a)

ERROR: type Nothing has no field a seems to be only catchable via Exception by trial and error, every documentation left me clueless...

match_strings = try @. getfield(match(regex, words), :match)
catch e
    if isa(e, Exception) return false end
    throw(e)
end

(snippet from a function)
Follow up: Is nothing.a / getproperty easier to catch if getfield is not?

Solution

  • It throws a simple ErrorException. You can check by catching the error and printing the type:

    julia> try
           getfield(nothing, :a)
       catch e
           println(typeof(e))
       end
# ErrorException

    getproperty(nothing, :a) throws the same, as does attempting to access property a via nothing.a.