Why are multiple instances of the single enum created?

[Per Nordlöw]

On Monday, 1 February 2021 at 11:37:49 UTC, Per Nordlöw wrote:
> Ok, so then my follow-up question becomes, does the right hand 
> sides of these two assignment share the same AST node? If not, 
> why?

Because such a shared AST node could be potentially mutated in 
different ways in different contexts during its passes?