open class L<LL>(val ll: LL)

class Rec<T>(val rt: T)

val <PT> Rec<PT>.p: L<PT>
    get() {
        class PLocal<LT>(lt: LT, val pt: PT): L<LT>(lt)
        return foo2(rt, rt, ::PLocal)
    }

fun <FT> Rec<FT>.fn(): L<FT> {
    class FLocal<LT>(lt: LT, val pt: FT) : L<LT>(lt)
    return foo2(rt, rt, ::FLocal)
}

fun <T1, T2, R> foo2(t1: T1, t2: T2, bb: (T1, T2) -> R): R = bb(t1, t2)