Fix nospecializing Functions in Union{Nothing,Function} params (#59327)
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…iaLang#59327) Fixes JuliaLang#59326. Change the logic that decides not to specialize a function parameter based on whether or not the supplied argument is a Function, and that function is not used, so that it will still work if the SpecType is a Union{Function,Nothing} or any other union that contains a Function. The logic is changed from a hardcoded rule of `type_i == Function || type_i == Any || type_i == Base.Callable` to `type_i >: Function`. This covers all of the above cases, but also includes custom `Union{Function, T}` such as `Union{Function, Nothing}`. --------- Co-authored-by: Nick Robinson <[email protected]> Co-authored-by: Jameson Nash <[email protected]>
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port-to-v1.12
kpamnany
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Aug 26, 2025
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PR Description
Backports JuliaLang#59327.
Original PR description:
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Union{Nothing,Function}params JuliaLang/julia#59327port-to-*labels that don't apply.