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kotlinlang

Untitled.kt

`} as T` is giving me the error `Unchecked cast: Base to T`. But this is guaranteed to be true logically...

that's because `Iterable<T>.first` returns `T`. Compiler works on its return type.
You can use the following approach with safe casting (`as?`) and reified generics for clean solution:
```inline fun <reified T : Base> findFirstInstance(): T = things.firstNotNullOf { it as? T }```
`firstNotNullOf` as the name suggest returns first not-null value of lambda transformation. Lambda transformation here uses safe cast either returning `T` or `null`, therefore resulting type of `firstNotNullOf { T? }` becomes `T`