Add package-level class descriptors generation to the SyntheticResolveExtension

required for extracting script descriptors generation to an extension

compiler/frontend/src/org/jetbrains/kotlin/resolve/extensions/SyntheticResolveExtension.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.resolve.extensions
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.descriptors.SimpleFunctionDescriptor
 import org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor
@@ -26,6 +27,7 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.lazy.LazyClassContext
 import org.jetbrains.kotlin.resolve.lazy.declarations.ClassMemberDeclarationProvider
+import org.jetbrains.kotlin.resolve.lazy.declarations.PackageMemberDeclarationProvider
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
 import java.util.*
@@ -66,13 +68,18 @@ interface SyntheticResolveExtension {
                 ) =
                     instances.forEach {
                         withLinkageErrorLogger(it) {
-                            generateSyntheticClasses(
+                            generateSyntheticClasses(thisDescriptor, name, ctx, declarationProvider, result)
-                                thisDescriptor,
+                        }
-                                name,
+                    }
-                                ctx,
+
-                                declarationProvider,
+                override fun generateSyntheticClasses(
-                                result
+                    thisDescriptor: PackageFragmentDescriptor, name: Name,
-                            )
+                    ctx: LazyClassContext, declarationProvider: PackageMemberDeclarationProvider,
+                    result: MutableSet<ClassDescriptor>
+                ) =
+                    instances.forEach {
+                        withLinkageErrorLogger(it) {
+                            generateSyntheticClasses(thisDescriptor, name, ctx, declarationProvider, result)
                         }
                     }
 
@@ -139,6 +146,15 @@ interface SyntheticResolveExtension {
     ) {
     }
 
+    fun generateSyntheticClasses(
+        thisDescriptor: PackageFragmentDescriptor,
+        name: Name,
+        ctx: LazyClassContext,
+        declarationProvider: PackageMemberDeclarationProvider,
+        result: MutableSet<ClassDescriptor>
+    ) {
+    }
+
     fun generateSyntheticMethods(
         thisDescriptor: ClassDescriptor,
         name: Name,

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

@@ -51,7 +51,7 @@ class LazyPackageMemberScope(
         getScopeForMemberDeclarationResolution(declaration)
 
     override fun getNonDeclaredClasses(name: Name, result: MutableSet<ClassDescriptor>) {
-        // No extra classes
+        c.syntheticResolveExtension.generateSyntheticClasses(thisDescriptor, name, c, declarationProvider, result)
     }
 
     override fun getNonDeclaredFunctions(name: Name, result: MutableSet<SimpleFunctionDescriptor>) {