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kotlinlang

is an unsafeCast still subject to classcast exceptions?

no, just trying to figure out when those happen

they're very tricky to debug because I'm lacking stacktraces

my gutt feeling is that X as Y produces one but nothing else

I'm also running into some difficulties with class instance checks since a super class is not accessible to Kotlin during runtime

well technically it is, but it's a proxy hack by another dev to work around limitations

so I can instanceof Weapon for instance, but not Item

<https://github.com/foundryvtt/pf2e/blob/master/src/module/item/base/document.ts#L890-L906>

(constructor returns a different instance based on the .type field)

Nope, `unsafeCast&lt;T&gt;` will just take `T` as granted. No transformation is done in the compiled JS