fix bug with max_values in union! #30315
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nalimilan
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| max_values(::Type{Bool}) = 2 | ||
| max_values(::Type{Nothing}) = 1 |
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Could this be applied to all singleton types? You can check whether a type is a singleton using isdefined(T, :instance) (there's an issingletontype helper function for this in replace.jl).
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Yes seems like a good idea!
As CI is green and I think this is an urgent fix to have, I will merge as-is later today and implement your idea (which is not directly related to the bugfix) separately.
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This fixes a bug in
union!leading to currently havingSet([nothing, true, false])having only two elements :(