FIR checker: improve diagnostics message for SEALED_INHERITOR_IN_DIFFERENT_PACKAGE

compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt

@@ -160,10 +160,7 @@ object DIAGNOSTICS_LIST : DiagnosticList("FirErrors") {
         val CLASS_IN_SUPERTYPE_FOR_ENUM by error<KtTypeReference>()
         val SEALED_SUPERTYPE by error<KtTypeReference>()
         val SEALED_SUPERTYPE_IN_LOCAL_CLASS by error<KtTypeReference>()
-        val SEALED_INHERITOR_IN_DIFFERENT_PACKAGE by error<KtTypeReference> {
-            parameter<FqName>("subclassPackage")
-            parameter<FqName>("basePackage")
-        }
+        val SEALED_INHERITOR_IN_DIFFERENT_PACKAGE by error<KtTypeReference>()
         val SEALED_INHERITOR_IN_DIFFERENT_MODULE by error<KtTypeReference>()
         val CLASS_INHERITS_JAVA_SEALED_CLASS by error<KtTypeReference>()
         val SUPERTYPE_NOT_A_CLASS_OR_INTERFACE by error<KtElement> {

compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt

@@ -168,7 +168,7 @@ object FirErrors {
     val CLASS_IN_SUPERTYPE_FOR_ENUM by error0<KtTypeReference>()
     val SEALED_SUPERTYPE by error0<KtTypeReference>()
     val SEALED_SUPERTYPE_IN_LOCAL_CLASS by error0<KtTypeReference>()
-    val SEALED_INHERITOR_IN_DIFFERENT_PACKAGE by error2<KtTypeReference, FqName, FqName>()
+    val SEALED_INHERITOR_IN_DIFFERENT_PACKAGE by error0<KtTypeReference>()
     val SEALED_INHERITOR_IN_DIFFERENT_MODULE by error0<KtTypeReference>()
     val CLASS_INHERITS_JAVA_SEALED_CLASS by error0<KtTypeReference>()
     val SUPERTYPE_NOT_A_CLASS_OR_INTERFACE by error1<KtElement, String>()

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirSealedSupertypeChecker.kt

@@ -48,13 +48,7 @@ object FirSealedSupertypeChecker : FirClassChecker() {
             }
             val superClassPackage = superClass.classId.packageFqName
             if (superClassPackage != subclassPackage) {
-                reporter.reportOn(
-                    superTypeRef.source,
-                    FirErrors.SEALED_INHERITOR_IN_DIFFERENT_PACKAGE,
-                    subclassPackage,
-                    superClassPackage,
-                    context
-                )
+                reporter.reportOn(superTypeRef.source, FirErrors.SEALED_INHERITOR_IN_DIFFERENT_PACKAGE, context)
             }
             if (superClass.moduleData != declaration.moduleData) {
                 // TODO: implement logic like in org.jetbrains.kotlin.resolve.checkers.SealedInheritorInSameModuleChecker for MPP support.

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

@@ -573,14 +573,9 @@ class FirDefaultErrorMessages {
             map.put(CLASS_IN_SUPERTYPE_FOR_ENUM, "Enum class cannot inherit from classes")
             map.put(SEALED_SUPERTYPE, "This type is sealed, so it can be inherited by only its own nested classes or objects")
             map.put(SEALED_SUPERTYPE_IN_LOCAL_CLASS, "Local class cannot extend a sealed class")
-            map.put(
-                SEALED_INHERITOR_IN_DIFFERENT_PACKAGE,
-                "Inheritor of sealed class or interface declared in package {0} but it must be in package {1} where base class is declared",
-                TO_STRING,
-                TO_STRING
-            )
+            map.put(SEALED_INHERITOR_IN_DIFFERENT_PACKAGE, "A class can only inherit from a sealed class or interface declared in the same package")
             map.put(SEALED_INHERITOR_IN_DIFFERENT_MODULE, "Inheritance of sealed classes or interfaces from different module is prohibited")
-            map.put(CLASS_INHERITS_JAVA_SEALED_CLASS, "Inheritance of java sealed classes is prohibited")
+            map.put(CLASS_INHERITS_JAVA_SEALED_CLASS, "Inheritance of Java sealed classes is prohibited")
 
             map.put(SUPERTYPE_NOT_A_CLASS_OR_INTERFACE, "Supertype is not a class or interface", TO_STRING)
             map.put(CYCLIC_INHERITANCE_HIERARCHY, "There's a cycle in the inheritance hierarchy for this type")

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -452,8 +452,6 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
     }
     add(FirErrors.SEALED_INHERITOR_IN_DIFFERENT_PACKAGE) { firDiagnostic ->
         SealedInheritorInDifferentPackageImpl(
-            firDiagnostic.a,
-            firDiagnostic.b,
             firDiagnostic as FirPsiDiagnostic,
             token,
         )

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -343,8 +343,6 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
 
     abstract class SealedInheritorInDifferentPackage : KtFirDiagnostic<KtTypeReference>() {
         override val diagnosticClass get() = SealedInheritorInDifferentPackage::class
-        abstract val subclassPackage: FqName
-        abstract val basePackage: FqName
     }
 
     abstract class SealedInheritorInDifferentModule : KtFirDiagnostic<KtTypeReference>() {

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -523,8 +523,6 @@ internal class SealedSupertypeInLocalClassImpl(
 }
 
 internal class SealedInheritorInDifferentPackageImpl(
-    override val subclassPackage: FqName,
-    override val basePackage: FqName,
     firDiagnostic: FirPsiDiagnostic,
     override val token: ValidityToken,
 ) : KtFirDiagnostic.SealedInheritorInDifferentPackage(), KtAbstractFirDiagnostic<KtTypeReference> {