Don't expose special classes when producing frameworks

* Kotlin annotation classes;
* Enum entry classes;
* Interop types.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportHeaderGenerator.kt

@@ -17,18 +17,17 @@
 package org.jetbrains.kotlin.backend.konan.objcexport
 
 import org.jetbrains.kotlin.backend.konan.Context
+import org.jetbrains.kotlin.backend.konan.KonanCompilationException
 import org.jetbrains.kotlin.backend.konan.descriptors.getPackageFragments
 import org.jetbrains.kotlin.backend.konan.descriptors.isInterface
+import org.jetbrains.kotlin.backend.konan.reportCompilationError
 import org.jetbrains.kotlin.builtins.getReceiverTypeFromFunctionType
 import org.jetbrains.kotlin.builtins.getReturnTypeFromFunctionType
 import org.jetbrains.kotlin.builtins.getValueParameterTypesFromFunctionType
 import org.jetbrains.kotlin.builtins.isFunctionType
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassNotAny
+import org.jetbrains.kotlin.resolve.descriptorUtil.*
-import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperInterfaces
-import org.jetbrains.kotlin.resolve.descriptorUtil.isSubclassOf
-import org.jetbrains.kotlin.resolve.descriptorUtil.module
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeUtils
@@ -120,6 +119,11 @@ internal class ObjCExportHeaderGenerator(val context: Context) {
         val descriptorToName = if (descriptor.isInterface) interfaceToName else classToName
 
         return descriptorToName.getOrPut(descriptor) {
+            if (!mapper.shouldBeExposed(descriptor)) {
+                context.reportCompilationError("Can't produce ${descriptor.fqNameSafe.asString()} to framework API")
+                throw KonanCompilationException()
+            }
+
             namer.getClassOrProtocolName(descriptor)
         }
     }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportMapper.kt

@@ -20,6 +20,7 @@ import org.jetbrains.kotlin.backend.common.descriptors.allParameters
 import org.jetbrains.kotlin.backend.common.descriptors.isSuspend
 import org.jetbrains.kotlin.backend.konan.ValueType
 import org.jetbrains.kotlin.backend.konan.correspondingValueType
+import org.jetbrains.kotlin.backend.konan.isObjCObjectType
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.resolve.descriptorUtil.isEffectivelyPublicApi
@@ -50,7 +51,10 @@ internal fun ObjCExportMapper.shouldBeExposed(descriptor: CallableMemberDescript
         descriptor.isEffectivelyPublicApi && !descriptor.isSuspend
 
 internal fun ObjCExportMapper.shouldBeExposed(descriptor: ClassDescriptor): Boolean =
-        descriptor.isEffectivelyPublicApi
+        descriptor.isEffectivelyPublicApi && !descriptor.defaultType.isObjCObjectType() && when (descriptor.kind) {
+            ClassKind.CLASS, ClassKind.INTERFACE, ClassKind.ENUM_CLASS, ClassKind.OBJECT -> true
+            ClassKind.ENUM_ENTRY, ClassKind.ANNOTATION_CLASS -> false
+        }
 
 private fun ObjCExportMapper.isBase(descriptor: CallableMemberDescriptor): Boolean =
         descriptor.overriddenDescriptors.all { !shouldBeExposed(it) }
@@ -117,7 +121,7 @@ private fun ObjCExportMapper.bridgeType(kotlinType: KotlinType): TypeBridge {
             ?: return ReferenceBridge
 
     val objCValueType = ObjCValueType.values().singleOrNull { it.kotlinValueType == valueType }
-            ?: error(valueType)
+            ?: error("Can't produce $kotlinType to framework API")
 
     return ValueTypeBridge(objCValueType)
 }