KT-9666 Inner classes do not appear in type completion

#KT-9666

compiler/frontend/src/org/jetbrains/kotlin/resolve/scopes/receivers/Qualifier.kt

@@ -75,11 +75,24 @@ class QualifierReceiver (
     override var resultingDescriptor: DeclarationDescriptor by Delegates.notNull()
 
     override val scope: KtScope get() {
-        val classObjectTypeScope = (classifier as? ClassDescriptor)?.classObjectType?.getMemberScope()?.let {
+        val scopes = ArrayList<KtScope>(4)
+
+        val classObjectTypeScope = (classifier as? ClassDescriptor)?.classObjectType?.memberScope?.let {
             FilteringScope(it) { it !is ClassDescriptor }
         }
-        val scopes = listOf(classObjectTypeScope, getNestedClassesAndPackageMembersScope()).filterNotNull().toTypedArray()
-        return ChainedScope(descriptor, "Member scope for " + name + " as package or class or object", *scopes)
+        scopes.addIfNotNull(classObjectTypeScope)
+
+        scopes.addIfNotNull(packageView?.memberScope)
+
+        if (classifier is ClassDescriptor) {
+            scopes.add(classifier.staticScope)
+
+            if (classifier.kind != ClassKind.ENUM_ENTRY) {
+                scopes.add(classifier.unsubstitutedInnerClassesScope)
+            }
+        }
+
+        return ChainedScope(descriptor, "Member scope for $name as package or class or object", *scopes.toTypedArray())
     }
 
     fun getClassObjectReceiver(): ReceiverValue =

compiler/testData/diagnostics/tests/classObjects/InnerClassAccessThroughClassObject.kt

@@ -33,7 +33,7 @@ fun f() {
     A().Inner()
     A.Companion.<!UNRESOLVED_REFERENCE!>Nested<!>
     A.Companion.<!UNRESOLVED_REFERENCE!>Inner<!>
-    A.<!UNRESOLVED_REFERENCE!>Inner<!>
+    A.<!NO_COMPANION_OBJECT!>Inner<!>
     A.Companion.c
     A.Companion.Obj2
     A.Companion.Obj2.c

compiler/testData/diagnostics/tests/classObjects/InnerClassAccessThroughEnum.kt

@@ -42,7 +42,7 @@ fun f() {
     C.O
     C.O.InO
     C.A()
-    C.<!UNRESOLVED_REFERENCE!>B<!>()
+    C.<!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>B<!>()
 
     C.E3.<!UNRESOLVED_REFERENCE!>O_O<!>
     C.E3.<!UNRESOLVED_REFERENCE!>G<!>()

compiler/testData/diagnostics/tests/inner/qualifiedExpression/constructNestedClass.kt

@@ -11,7 +11,7 @@ class Outer {
 fun f1() = Outer()
 fun f2() = Outer.Nested()
 fun f3() = Outer.Nested.NestedNested()
-fun f4() = Outer.<!UNRESOLVED_REFERENCE!>Inner<!>()
-fun f5() = Outer.<!UNRESOLVED_REFERENCE!>Inner<!>.<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>InnerInner<!>()
+fun f4() = Outer.<!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>Inner<!>()
+fun f5() = Outer.Inner.<!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>InnerInner<!>()
 fun f6() = Outer().Inner()
-fun f7() = Outer().Inner().InnerInner()
+fun f7() = Outer().Inner().InnerInner()

compiler/testData/diagnostics/tests/inner/qualifiedExpression/constructNestedClass.txt

@@ -4,7 +4,7 @@ public fun f1(): Outer
 public fun f2(): Outer.Nested
 public fun f3(): Outer.Nested.NestedNested
 public fun f4(): [ERROR : Error function type]
-public fun f5(): [ERROR : <ERROR FUNCTION RETURN TYPE>]
+public fun f5(): [ERROR : Error function type]
 public fun f6(): Outer.Inner
 public fun f7(): Outer.Inner.InnerInner
 

compiler/testData/diagnostics/tests/regressions/kt4827.kt

@@ -12,5 +12,5 @@ class C {
 
 fun f() {
     <!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>TestInterface<!>()
-    C.<!UNRESOLVED_REFERENCE!>I<!>()
+    C.<!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>I<!>()
 }

compiler/testData/diagnostics/tests/scopes/inheritance/nestedFromJava.kt

@@ -46,7 +46,7 @@ class Y: B() {
 
     init {
         B_()
-        B.<!UNRESOLVED_REFERENCE!>B_<!>()
+        B.<!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>B_<!>()
         Y.<!UNRESOLVED_REFERENCE!>B_<!>()
 
         B_S()

compiler/testData/diagnostics/tests/scopes/inheritance/nestedFromJavaAfterKotlin.kt

@@ -36,7 +36,7 @@ public class F extends D {
 class X: D() {
     init {
         B_()
-        B.<!UNRESOLVED_REFERENCE!>B_<!>()
+        B.<!NO_COMPANION_OBJECT, FUNCTION_EXPECTED!>B_<!>()
         C.<!UNRESOLVED_REFERENCE!>B_<!>()
         D.<!UNRESOLVED_REFERENCE!>B_<!>()
         X.<!UNRESOLVED_REFERENCE!>B_<!>()

idea/idea-completion/testData/basic/common/InnerClass.kt

@@ -0,0 +1,11 @@
+class AAA {
+    class Nested
+    inner class Inner
+}
+
+fun a(a: AAA.<caret>) {
+}
+
+// EXIST: Nested
+// EXIST: Inner
+// NOTHING_ELSE

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JSBasicCompletionTestGenerated.java

@@ -439,6 +439,12 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
             doTest(fileName);
         }
 
+        @TestMetadata("InnerClass.kt")
+        public void testInnerClass() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InnerClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("InsideAnonymousClass.kt")
         public void testInsideAnonymousClass() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InsideAnonymousClass.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JvmBasicCompletionTestGenerated.java

@@ -439,6 +439,12 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
             doTest(fileName);
         }
 
+        @TestMetadata("InnerClass.kt")
+        public void testInnerClass() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InnerClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("InsideAnonymousClass.kt")
         public void testInsideAnonymousClass() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InsideAnonymousClass.kt");

idea/testData/refactoring/move/java/moveClass/moveTopToInner/moveTopLevelClassToNestedClass/after/onDemandImport.kt

@@ -1,5 +1,5 @@
 import B.*
 
 fun bar() {
-    val t: C.A = B.C.A()
+    val t: C.A = C.A()
 }