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> .NET doesn't have discriminated unions

Class hierarchies are discriminated unions. .NET doesn't feature general unboxed discriminated unions (although it can do this for simple blitted types using [FieldOffset]):

https://sourceforge.net/p/sasa/code/ci/default/tree/Sasa.Bin...

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Yes, I supposed you could compile rust to .NET if you boxed everything (including simple integer fields, to allow taking their address as &i32) and used inheritance hierarchies for enums. Though that approach will still fail as soon as you encounter unsafe code with pointer casts, so I doubt you would be able to use the standard library.

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