[K/N] KT-56464: implementation of HiddenFromObjC for classes in backend

compiler/fir/checkers/checkers.native/src/org/jetbrains/kotlin/fir/analysis/diagnostics/native/FirNativeErrorsDefaultMessages.kt

@@ -61,7 +61,7 @@ object FirNativeErrorsDefaultMessages : BaseDiagnosticRendererFactory() {
         )
         map.put(
             INVALID_OBJC_REFINEMENT_TARGETS,
-            "Refines annotations are only applicable to annotations with targets FUNCTION and/or PROPERTY"
+            "Refines annotations are only applicable to annotations with targets CLASS, FUNCTION and/or PROPERTY"
         )
         map.put(INAPPLICABLE_OBJC_NAME, "@ObjCName is not applicable on overrides")
         map.put(INVALID_OBJC_NAME, "@ObjCName should have a name and/or swiftName")

compiler/fir/checkers/checkers.native/src/org/jetbrains/kotlin/fir/analysis/native/checkers/FirNativeObjCRefinementAnnotationChecker.kt

@@ -21,7 +21,7 @@ import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 
 object FirNativeObjCRefinementAnnotationChecker : FirRegularClassChecker() {
 
-    private val supportedTargets = arrayOf(KotlinTarget.FUNCTION, KotlinTarget.PROPERTY)
+    private val supportedTargets = arrayOf(KotlinTarget.FUNCTION, KotlinTarget.PROPERTY, KotlinTarget.CLASS)
 
     override fun check(declaration: FirRegularClass, context: CheckerContext, reporter: DiagnosticReporter) {
         if (declaration.classKind != ClassKind.ANNOTATION_CLASS) return

compiler/testData/diagnostics/nativeTests/objCRefinement.kt

@@ -25,7 +25,7 @@ public annotation class ShouldRefineInSwift
 package plugin
 
 @HidesFromObjC
-@Target(AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION)
+@Target(AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION, AnnotationTarget.CLASS)
 @Retention(AnnotationRetention.BINARY)
 annotation class PluginHiddenFromObjC
 
@@ -45,7 +45,7 @@ import plugin.PluginShouldRefineInSwift
 annotation class MyRefinedAnnotationA
 
 <!INVALID_OBJC_REFINEMENT_TARGETS!>@HidesFromObjC<!>
-@Target(AnnotationTarget.PROPERTY, AnnotationTarget.CLASS)
+@Target(AnnotationTarget.PROPERTY, AnnotationTarget.FILE)
 @Retention(AnnotationRetention.BINARY)
 annotation class MyRefinedAnnotationB
 

compiler/testData/diagnostics/nativeTests/objCRefinement.txt

@@ -88,7 +88,7 @@ public interface InterfaceB {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
-@kotlin.native.HidesFromObjC @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.PROPERTY, AnnotationTarget.CLASS}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) public final annotation class MyRefinedAnnotationB : kotlin.Annotation {
+@kotlin.native.HidesFromObjC @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.PROPERTY, AnnotationTarget.FILE}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) public final annotation class MyRefinedAnnotationB : kotlin.Annotation {
     public constructor MyRefinedAnnotationB()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -146,7 +146,7 @@ package kotlin {
 
 package plugin {
 
-    @kotlin.native.HidesFromObjC @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) public final annotation class PluginHiddenFromObjC : kotlin.Annotation {
+    @kotlin.native.HidesFromObjC @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.PROPERTY, AnnotationTarget.FUNCTION, AnnotationTarget.CLASS}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) public final annotation class PluginHiddenFromObjC : kotlin.Annotation {
         public constructor PluginHiddenFromObjC()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int