KT-11030 Minor code improvements

js/js.translator/testData/closure/cases/deepInnerClassInLocalClass.kt

@@ -0,0 +1,23 @@
+package foo
+
+class A() {
+    fun test(): Int {
+        open class B(open val x: Int) {
+            inner class C(override val x: Int) : B(x * 10) {
+                inner class D() {
+                    var baz: () -> Int = { 0 }
+                    constructor(b: Boolean) : this() {
+                        baz = { x + this@B.x }
+                    }
+                    fun bar() = { x + this@B.x }
+                }
+            }
+        }
+        return B(3).C(2).D().bar()() + B(5).C(4).D(true).baz()
+    }
+}
+
+fun box(): String {
+    assertEquals(2345, A().test())
+    return "OK"
+}

js/js.translator/testData/closure/cases/deepInnerClassInLocalClassFromExtension.kt

@@ -0,0 +1,23 @@
+package foo
+
+class A() {
+    fun test(): Int {
+        open class B(open val x: Int) {
+            inner class C(override val x: Int) : B(x * 10) {
+                inner class D() {
+                    fun baz() = bar()
+                }
+
+                fun D.bar() = { x + this@B.x }
+            }
+        }
+
+
+        return B(3).C(2).D().baz()()
+    }
+}
+
+fun box(): String {
+    assertEquals(23, A().test())
+    return "OK"
+}

js/js.translator/testData/closure/cases/implicitGenericReceiverInExtensionInLocalClass.kt

@@ -0,0 +1,17 @@
+package foo
+
+class A {
+    fun test() = 23
+}
+
+fun <T : A> T.foo(): Int {
+    class B {
+        fun foo() = test()
+    }
+    return B().foo()
+}
+
+fun box(): String {
+    assertEquals(23, A().foo())
+    return "OK"
+}