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kotlinlang

why do i get a unchecked cast warning when using `as?`

probably you either do not have an `is` check before, or it is a non-local `var` you're casting

i expected that as? is always safe because its null when the type is different

I'd rather expect that you are casting a generic type

yes. it was a generic type and my method was not reified. its fixed now :slightly_smiling_face:

but the error message was a bit non specific

<@U0FMXU16E> `Unchecked cast` doesn’t refer to whether or not you’ll get a cast is _safe_ (i.e. if you get a `ClassCastException`); instead, it refers to when you’re casting to a generic, in which case the compiler doesn’t have any easy way to check what the generic type really is (thanks, type erasure)

I definitely agree it’s a bit of a vague error, but it’s the same nomenclature used in Java-land, and I figure it was kept for familiarity’s sake