Please, where is Nothing/nothing declared?
Thank you ahead of time.
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On the phone now so not sure, but I would try @edit Nothing() to see where the nothing type is defined. Not sure how to easily find the location of the definition of nothing, though I’d guess it might be close to the type?
It’s implemented in C. See, e.g., here: julia/jltypes.c at 4d50ff87fac20ada6f32041927dd55907796bde3 · JuliaLang/julia · GitHub
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I suspect this is a XY problem. What are you trying to do?
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Out of curiosity, why does it need to be implemented in C?
My guess is that it’s for bootstrap reasons: Nothing may be needed by other parts of the code that are written in the C side. Apart from bootstrap, I wouldn’t see many reasons for it not to be defined in Julia as a singleton struct like Missing
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