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kotlinlang

IMG_20231018_082610_530.jpg

Why is an error reported here?
It works fine in js

Even if you in the end cross-compile to JS

the name isn't bound until after the declaration. this allows for things like
```fun foo(x: Int?) {
    val x: Int = x ?: default```
the `x` on the right-hand side refers to the `x` from the outer scope, the left-hand side `x` doesn't exist yet.

Not that you should do such shadowing :smile:

also it would be unsafe in Kotlin to allow that, for example
```val x = run { x }```

to write a self-referential lambda, you need to use an object expression,
```val obs = object : () -&gt; Unit {
    override fun invoke() {
        signalApplyCallback = this
    }
}```
note that the name `obs` still isn't bound yet, but you can refer to the lambda itself as `this`