[FIR] Fix disappeared INVALID_CHARACTERS_NATIVE_ERROR

https://youtrack.jetbrains.com/issue/KT-60003/K2-Disappeared-INVALIDCHARACTERSNATIVEERROR

^KT-60003 Fixed

Merge-request: KT-MR-12686
Merged-by: Vladimir Sukharev <Vladimir.Sukharev@jetbrains.com>

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

@@ -37,7 +37,7 @@ object FirNativeIdentifierChecker : FirBasicDeclarationChecker() {
         }
     }
 
-    private fun checkNameAndReport(name: Name, source: KtSourceElement?, context: CheckerContext, reporter: DiagnosticReporter) {
+    internal fun checkNameAndReport(name: Name, source: KtSourceElement?, context: CheckerContext, reporter: DiagnosticReporter) {
         if (source != null && source.kind !is KtFakeSourceElementKind && !name.isSpecial) {
             val text = name.asString()
             val message = when {

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

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010-2023 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.fir.analysis.native.checkers
+
+import org.jetbrains.kotlin.KtNodeTypes.REFERENCE_EXPRESSION
+import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
+import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
+import org.jetbrains.kotlin.fir.analysis.checkers.declaration.FirFileChecker
+import org.jetbrains.kotlin.fir.analysis.forEachChildOfType
+import org.jetbrains.kotlin.fir.analysis.native.checkers.FirNativeIdentifierChecker.checkNameAndReport
+import org.jetbrains.kotlin.fir.declarations.FirFile
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.text
+
+object FirNativePackageDirectiveChecker : FirFileChecker() {
+    override fun check(declaration: FirFile, context: CheckerContext, reporter: DiagnosticReporter) {
+        declaration.packageDirective.source?.forEachChildOfType(setOf(REFERENCE_EXPRESSION)) {
+            checkNameAndReport(
+                Name.identifier(it.text.toString()),
+                it,
+                context,
+                reporter
+            )
+        }
+    }
+}

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

@@ -33,4 +33,9 @@ object NativeDeclarationCheckers : DeclarationCheckers() {
             FirNativeObjCRefinementAnnotationChecker,
             FirNativeHiddenFromObjCInheritanceChecker,
         )
+
+    override val fileCheckers: Set<FirFileChecker>
+        get() = setOf(
+            FirNativePackageDirectiveChecker,
+        )
 }