Enum and optional annotations don't work together

[jofaul]

Is your feature request related to a problem?

Annotating a function with an enum annotation (e.g. {"a", "b", "c"} -> Enum.A, Enum.B, Enum.C) works, giving it an optional annotation with the default value "a" also works, but this default value should be Enum.A and not the literal string "a".

Desired solution

Possibly expand the enum annotation to be able to mark a value as default, or expand optional annotation to add enums/code

Possible alternatives (optional)

No response

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Additional Context (optional)

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