Don't allow to use own nested classes when resolve header of (companion) object

compiler/frontend/src/org/jetbrains/kotlin/descriptors/ClassDescriptorWithResolutionScopes.java

@@ -30,6 +30,9 @@ public interface ClassDescriptorWithResolutionScopes extends ClassDescriptor {
     @NotNull
     LexicalScope getScopeForConstructorHeaderResolution();
 
+    @NotNull
+    LexicalScope getScopeForCompanionObjectHeaderResolution();
+
     @NotNull
     LexicalScope getScopeForMemberDeclarationResolution();
 

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/DeclarationScopeProviderImpl.java

@@ -60,17 +60,23 @@ public class DeclarationScopeProviderImpl implements DeclarationScopeProvider {
         }
 
         if (parentDeclaration instanceof KtClassOrObject) {
-            KtClassOrObject classOrObject = (KtClassOrObject) parentDeclaration;
+            KtClassOrObject parentClassOrObject = (KtClassOrObject) parentDeclaration;
-            LazyClassDescriptor classDescriptor = (LazyClassDescriptor) lazyDeclarationResolver.getClassDescriptor(classOrObject, NoLookupLocation.WHEN_GET_DECLARATION_SCOPE);
+            LazyClassDescriptor parentClassDescriptor = (LazyClassDescriptor) lazyDeclarationResolver.getClassDescriptor(parentClassOrObject, NoLookupLocation.WHEN_GET_DECLARATION_SCOPE);
+
             if (ktDeclaration instanceof KtAnonymousInitializer || ktDeclaration instanceof KtProperty) {
-                return classDescriptor.getScopeForInitializerResolution();
+                return parentClassDescriptor.getScopeForInitializerResolution();
-            }
-            if (ktDeclaration instanceof KtObjectDeclaration
-                || (ktDeclaration instanceof KtClass && !((KtClass) ktDeclaration).isInner())) {
-                return classDescriptor.getScopeForStaticMemberDeclarationResolution();
             }
 
-            return classDescriptor.getScopeForMemberDeclarationResolution();
+            if (ktDeclaration instanceof KtObjectDeclaration && ((KtObjectDeclaration) ktDeclaration).isCompanion()) {
+                return parentClassDescriptor.getScopeForCompanionObjectHeaderResolution();
+            }
+
+            if (ktDeclaration instanceof KtObjectDeclaration ||
+                ktDeclaration instanceof KtClass && !((KtClass) ktDeclaration).isInner()) {
+                return parentClassDescriptor.getScopeForStaticMemberDeclarationResolution();
+            }
+
+            return parentClassDescriptor.getScopeForMemberDeclarationResolution();
         }
         //TODO: this is not how it works for classes and for exact parity we can try to use the code above
         if (parentDeclaration instanceof KtScript) {

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/ClassResolutionScopesSupport.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.resolve.lazy.descriptors
 import com.intellij.util.SmartList
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.ReceiverParameterDescriptor
 import org.jetbrains.kotlin.psi.KtParameter
 import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassNotAny
 import org.jetbrains.kotlin.resolve.scopes.*
@@ -47,17 +48,24 @@ class ClassResolutionScopesSupport(
         scopeWithGenerics(scopeForStaticMemberDeclarationResolution())
     }
 
-    private val inheritanceScope: () -> LexicalScope = storageManager.createLazyValue(onRecursion = createThrowingLexicalScope) {
+    private val inheritanceScopeWithoutMe: () -> LexicalScope = storageManager.createLazyValue(onRecursion = createThrowingLexicalScope) {
-        classDescriptor.getAllSuperclassesAndMeWithoutAny().asReversed().fold(getOuterScope()) { scope, currentClass ->
+        classDescriptor.getAllSuperclassesWithoutAny().asReversed().fold(getOuterScope()) { scope, currentClass ->
             createInheritanceScope(parent = scope, ownerDescriptor = classDescriptor, classDescriptor = currentClass)
         }
     }
 
+    private val inheritanceScopeWithMe: () -> LexicalScope = storageManager.createLazyValue(onRecursion = createThrowingLexicalScope) {
+        createInheritanceScope(parent = inheritanceScopeWithoutMe(), ownerDescriptor = classDescriptor, classDescriptor = classDescriptor)
+    }
+
+    public val scopeForCompanionObjectHeaderResolution: () -> LexicalScope = storageManager.createLazyValue(onRecursion = createThrowingLexicalScope) {
+        val inheritanceScope = createInheritanceScope(inheritanceScopeWithoutMe(), classDescriptor, classDescriptor, withCompanionObject = false)
+        LexicalScopeImpl(inheritanceScope, classDescriptor, false, null, LexicalScopeKind.COMPANION_OBJECT_HEADER)
+    }
 
     public val scopeForMemberDeclarationResolution: () -> LexicalScope = storageManager.createLazyValue {
-        val scopeWithGenerics = scopeWithGenerics(inheritanceScope())
+        val scopeWithGenerics = scopeWithGenerics(inheritanceScopeWithMe())
-        LexicalScopeImpl(scopeWithGenerics, classDescriptor, true, classDescriptor.thisAsReceiverParameter,
+        LexicalScopeImpl(scopeWithGenerics, classDescriptor, true, classDescriptor.thisAsReceiverParameter, LexicalScopeKind.CLASS_MEMBER_SCOPE)
-                              LexicalScopeKind.CLASS_MEMBER_SCOPE)
     }
 
     public val scopeForStaticMemberDeclarationResolution: () -> LexicalScope = storageManager.createLazyValue(onRecursion = createThrowingLexicalScope) {
@@ -65,8 +73,7 @@ class ClassResolutionScopesSupport(
             scopeForMemberDeclarationResolution()
         }
         else {
-            LexicalScopeImpl(inheritanceScope(), classDescriptor, false, null,
+            LexicalScopeImpl(inheritanceScopeWithMe(), classDescriptor, false, null, LexicalScopeKind.CLASS_STATIC_SCOPE)
-                             LexicalScopeKind.CLASS_STATIC_SCOPE)
         }
     }
 
@@ -88,22 +95,24 @@ class ClassResolutionScopesSupport(
     }
 
 
-    public fun ClassDescriptor.getAllSuperclassesAndMeWithoutAny(): List<ClassDescriptor> {
+    public fun ClassDescriptor.getAllSuperclassesWithoutAny(): List<ClassDescriptor> {
-        val superClassesAndMe = SmartList<ClassDescriptor>()
+        val superClasses = SmartList<ClassDescriptor>()
-        var parent: ClassDescriptor? = this
+        var parent: ClassDescriptor? = getSuperClassNotAny()
-        do {
-            superClassesAndMe.add(parent)
-            parent = parent!!.getSuperClassNotAny()
-        }
-        while(parent != null && parent != this) // possible recursion in inheritance
 
-        return superClassesAndMe
+        // possible recursion in inheritance
+        while(parent != null && parent != this) {
+            superClasses.add(parent)
+            parent = parent.getSuperClassNotAny()
+        }
+
+        return superClasses
     }
 
     private fun createInheritanceScope(
             parent: LexicalScope,
             ownerDescriptor: DeclarationDescriptor,
-            classDescriptor: ClassDescriptor
+            classDescriptor: ClassDescriptor,
+            withCompanionObject: Boolean = true
     ): LexicalScope {
         val staticScopes = ArrayList<MemberScope>(3)
 
@@ -111,10 +120,19 @@ class ClassResolutionScopesSupport(
         staticScopes.add(classDescriptor.staticScope)
 
         staticScopes.add(classDescriptor.unsubstitutedInnerClassesScope)
-        staticScopes.addIfNotNull(classDescriptor.companionObjectDescriptor?.unsubstitutedInnerClassesScope)
+
+        val implicitReceiver: ReceiverParameterDescriptor?
+
+        if (withCompanionObject) {
+            staticScopes.addIfNotNull(classDescriptor.companionObjectDescriptor?.unsubstitutedInnerClassesScope)
+            implicitReceiver = classDescriptor.companionObjectDescriptor?.thisAsReceiverParameter
+        }
+        else {
+            implicitReceiver = null
+        }
 
         return LexicalChainedScope(parent, ownerDescriptor, false,
-                                   classDescriptor.companionObjectDescriptor?.thisAsReceiverParameter,
+                                   implicitReceiver,
                                    LexicalScopeKind.CLASS_INHERITANCE,
                                    memberScopes = *staticScopes.toTypedArray(), isStaticScope = true)
     }

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassDescriptor.java

@@ -298,6 +298,12 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
         return resolutionScopesSupport.getScopeForConstructorHeaderResolution().invoke();
     }
 
+    @Override
+    @NotNull
+    public LexicalScope getScopeForCompanionObjectHeaderResolution() {
+        return resolutionScopesSupport.getScopeForCompanionObjectHeaderResolution().invoke();
+    }
+
     @Override
     @NotNull
     public LexicalScope getScopeForMemberDeclarationResolution() {

compiler/frontend/src/org/jetbrains/kotlin/resolve/scopes/Scopes.kt

@@ -63,6 +63,7 @@ enum class LexicalScopeKind(val withLocalDescriptors: Boolean) {
     CLASS_STATIC_SCOPE(false),
     CLASS_MEMBER_SCOPE(false),
     CLASS_INITIALIZER(true),
+    COMPANION_OBJECT_HEADER(false),
 
     DEFAULT_VALUE(true),
 

compiler/testData/diagnostics/tests/inner/selfAnnotationForClassObject.kt

@@ -1,5 +1,5 @@
 class Test {
-    @ClassObjectAnnotation
+    <!UNRESOLVED_REFERENCE!>@ClassObjectAnnotation<!>
     @NestedAnnotation
     companion object {
         annotation class ClassObjectAnnotation

compiler/testData/diagnostics/tests/inner/selfAnnotationForClassObject.txt

@@ -6,7 +6,7 @@ public final class Test {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
-    @Test.Companion.ClassObjectAnnotation() @Test.NestedAnnotation() public companion object Companion {
+    @[ERROR : ClassObjectAnnotation]() @Test.NestedAnnotation() public companion object Companion {
         private constructor Companion()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int

compiler/testData/diagnostics/tests/scopes/classHeader/companionObjectParents.kt

@@ -0,0 +1,25 @@
+interface I<F, G>
+
+val aImpl: A.Companion.Interface
+    get() = null!!
+
+val bImpl: B.Companion.Interface
+    get() = null!!
+
+interface A {
+    companion object : <!UNRESOLVED_REFERENCE!>Nested<!>(), <!UNRESOLVED_REFERENCE, DELEGATION_NOT_TO_INTERFACE!>Interface<!> by aImpl, I<<!UNRESOLVED_REFERENCE!>Nested<!>, <!UNRESOLVED_REFERENCE!>Interface<!>> {
+
+        class Nested
+
+        interface Interface
+    }
+}
+
+class B {
+    companion object : <!UNRESOLVED_REFERENCE!>Nested<!>(), <!UNRESOLVED_REFERENCE, DELEGATION_NOT_TO_INTERFACE!>Interface<!> by aImpl, I<<!UNRESOLVED_REFERENCE!>Nested<!>, <!UNRESOLVED_REFERENCE!>Interface<!>> {
+
+        class Nested
+
+        interface Interface
+    }
+}

compiler/testData/diagnostics/tests/scopes/classHeader/companionObjectParents.txt

@@ -0,0 +1,63 @@
+package
+
+public val aImpl: A.Companion.Interface
+public val bImpl: B.Companion.Interface
+
+public interface A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object Companion : I<[ERROR : Nested], [ERROR : Interface]> {
+        private constructor Companion()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+        public interface Interface {
+            public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+            public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+            public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        }
+
+        public final class Nested {
+            public constructor Nested()
+            public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+            public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+            public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        }
+    }
+}
+
+public final class B {
+    public constructor B()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object Companion : I<[ERROR : Nested], [ERROR : Interface]> {
+        private constructor Companion()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+        public interface Interface {
+            public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+            public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+            public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        }
+
+        public final class Nested {
+            public constructor Nested()
+            public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+            public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+            public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        }
+    }
+}
+
+public interface I</*0*/ F, /*1*/ G> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/scopes/classHeader/objectParents.kt

@@ -0,0 +1,11 @@
+interface I<F, G>
+
+val aImpl: A.Interface
+    get() = null!!
+
+object A : <!UNRESOLVED_REFERENCE!>Nested<!>(), <!UNRESOLVED_REFERENCE, DELEGATION_NOT_TO_INTERFACE!>Interface<!> by aImpl, I<<!UNRESOLVED_REFERENCE!>Nested<!>, <!UNRESOLVED_REFERENCE!>Interface<!>> {
+
+    class Nested
+
+    interface Interface
+}

compiler/testData/diagnostics/tests/scopes/classHeader/objectParents.txt

@@ -0,0 +1,29 @@
+package
+
+public val aImpl: A.Interface
+
+public object A : I<[ERROR : Nested], [ERROR : Interface]> {
+    private constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public interface Interface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class Nested {
+        public constructor Nested()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public interface I</*0*/ F, /*1*/ G> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -14012,6 +14012,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                     doTest(fileName);
                 }
 
+                @TestMetadata("companionObjectParents.kt")
+                public void testCompanionObjectParents() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/scopes/classHeader/companionObjectParents.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("constructors.kt")
                 public void testConstructors() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/scopes/classHeader/constructors.kt");
@@ -14024,6 +14030,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                     doTest(fileName);
                 }
 
+                @TestMetadata("objectParents.kt")
+                public void testObjectParents() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/scopes/classHeader/objectParents.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("simpleDelegation.kt")
                 public void testSimpleDelegation() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/scopes/classHeader/simpleDelegation.kt");