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kotlin-fork/docs/inlining/examples/outer-this.md
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2024-01-22 13:39:49 +00:00

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### Inner classes
The basic problematic example looks like this:
```kotlin
class A(val x: Int) {
inner class B {
inline fun foo() = x
}
}
fun main() {
A(5).B().foo()
}
```
The problem is caused by the fact that there is no field, which stores A object inside B doesn't exist after
Fir2IR. This field is added by lowering (which is now exectued before inlining, but probably should be moved after),
and is a private one. This leads to two problems
1. This field doesn't exist in klib
2. Even if it exists, it shouldn't have a public signature, so can't be referenced from other klib.
There is a possibility that we can deprecate accessing this of outer class from public inline functions.
This would make fixing things a bit easier here.