[ObjCExport] AA: Enable generation of base declarations

^KT-65738 Fixed

native/objcexport-header-generator/impl/analysis-api/src/org/jetbrains/kotlin/objcexport/KtObjCExportConfiguration.kt

@@ -21,5 +21,11 @@ data class KtObjCExportConfiguration(
      * - [org.jetbrains.kotlin.backend.konan.objcexport.ObjCExportNamingHelper.canBeSwiftOuter]
      * - [org.jetbrains.kotlin.backend.konan.objcexport.ObjCExportNamingHelper.canBeSwiftInner]
      */
-    val objcGenerics: Boolean = true
+    val objcGenerics: Boolean = true,
+
+    /**
+     * Flag to enable/disable the emission of 'base declarations'
+     * (see [org.jetbrains.kotlin.objcexport.objCBaseDeclarations]).
+     */
+    val generateBaseDeclarationStubs: Boolean = true,
 )

native/objcexport-header-generator/impl/analysis-api/src/org/jetbrains/kotlin/objcexport/objCBaseDeclarations.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.objcexport
+
+import org.jetbrains.kotlin.backend.konan.objcexport.ObjCTopLevel
+import org.jetbrains.kotlin.backend.konan.objcexport.objCBaseDeclarations
+import org.jetbrains.kotlin.objcexport.analysisApiUtils.getDefaultSuperClassOrProtocolName
+
+context(KtObjCExportSession)
+internal fun objCBaseDeclarations(): List<ObjCTopLevel> {
+    return objCBaseDeclarations(
+        topLevelNamePrefix = configuration.frameworkName.orEmpty(),
+        objCNameOfAny = getDefaultSuperClassOrProtocolName(),
+        objCNameOfNumber = "Number".getObjCKotlinStdlibClassOrProtocolName(),
+        objCNameOfMutableMap = "MutableDictionary".getObjCKotlinStdlibClassOrProtocolName(),
+        objCNameOfMutableSet = "MutableSet".getObjCKotlinStdlibClassOrProtocolName(),
+        objCNameForNumberBox = { classId -> classId.shortClassName.asString().getObjCKotlinStdlibClassOrProtocolName() }
+    )
+}

native/objcexport-header-generator/impl/analysis-api/src/org/jetbrains/kotlin/objcexport/translateToObjCHeader.kt

@@ -127,6 +127,10 @@ fun translateToObjCHeader(files: List<KtFile>): ObjCHeader {
         classForwardDeclarations.add(errorForwardClass)
     }
 
+    if (configuration.generateBaseDeclarationStubs) {
+        stubs.addAll(0, objCBaseDeclarations())
+    }
+
     return ObjCHeader(
         stubs = stubs,
         classForwardDeclarations = classForwardDeclarations,

native/objcexport-header-generator/impl/analysis-api/test/org/jetbrains/kotlin/objcexport/testUtils/AnalysisApiBaseDeclarationsGenerator.kt

@@ -7,6 +7,9 @@ package org.jetbrains.kotlin.objcexport.testUtils
 
 import org.jetbrains.kotlin.backend.konan.objcexport.ObjCTopLevel
 import org.jetbrains.kotlin.backend.konan.tests.ObjCExportBaseDeclarationsTest
+import org.jetbrains.kotlin.objcexport.KtObjCExportConfiguration
+import org.jetbrains.kotlin.objcexport.KtObjCExportSession
+import org.jetbrains.kotlin.objcexport.objCBaseDeclarations
 import org.junit.jupiter.api.extension.ExtensionContext
 import org.junit.jupiter.api.extension.ParameterContext
 import org.junit.jupiter.api.extension.ParameterResolver
@@ -23,6 +26,8 @@ class AnalysisApiBaseDeclarationsGeneratorExtension : ParameterResolver {
 
 object AnalysisApiBaseDeclarationsGenerator : ObjCExportBaseDeclarationsTest.BaseDeclarationsGenerator {
     override fun invoke(topLevelPrefix: String): List<ObjCTopLevel> {
-        TODO("Analysis Api based 'base declaration generation' in not yet implemented")
+        return KtObjCExportSession(KtObjCExportConfiguration(topLevelPrefix)) {
+            objCBaseDeclarations()
+        }
     }
 }

native/objcexport-header-generator/impl/analysis-api/test/org/jetbrains/kotlin/objcexport/testUtils/AnalysisApiHeaderGenerator.kt

@@ -32,7 +32,12 @@ object AnalysisApiHeaderGenerator : HeaderGenerator {
         val session = createStandaloneAnalysisApiSession(root.listFiles().orEmpty().filter { it.extension == "kt" })
         val (module, files) = session.modulesWithFiles.entries.single()
         return analyze(module) {
-            KtObjCExportSession(KtObjCExportConfiguration(frameworkName = configuration.frameworkName)) {
+            KtObjCExportSession(
+                KtObjCExportConfiguration(
+                    frameworkName = configuration.frameworkName,
+                    generateBaseDeclarationStubs = configuration.generateBaseDeclarationStubs
+                )
+            ) {
                 translateToObjCHeader(files.map { it as KtFile })
             }
         }