KT-4107 Data objects

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

@@ -2438,6 +2438,12 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.DATA_OBJECT_CUSTOM_EQUALS_OR_HASH_CODE) { firDiagnostic ->
+        DataObjectCustomEqualsOrHashCodeImpl(
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.FUN_INTERFACE_CONSTRUCTOR_REFERENCE) { firDiagnostic ->
         FunInterfaceConstructorReferenceImpl(
             firDiagnostic as KtPsiDiagnostic,

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

@@ -1729,6 +1729,10 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = TailRecursionInTryIsNotSupported::class
     }
 
+    abstract class DataObjectCustomEqualsOrHashCode : KtFirDiagnostic<KtNamedFunction>() {
+        override val diagnosticClass get() = DataObjectCustomEqualsOrHashCode::class
+    }
+
     abstract class FunInterfaceConstructorReference : KtFirDiagnostic<KtExpression>() {
         override val diagnosticClass get() = FunInterfaceConstructorReference::class
     }

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

@@ -2073,6 +2073,11 @@ internal class TailRecursionInTryIsNotSupportedImpl(
     override val token: KtLifetimeToken,
 ) : KtFirDiagnostic.TailRecursionInTryIsNotSupported(), KtAbstractFirDiagnostic<PsiElement>
 
+internal class DataObjectCustomEqualsOrHashCodeImpl(
+    override val firDiagnostic: KtPsiDiagnostic,
+    override val token: KtLifetimeToken,
+) : KtFirDiagnostic.DataObjectCustomEqualsOrHashCode(), KtAbstractFirDiagnostic<KtNamedFunction>
+
 internal class FunInterfaceConstructorReferenceImpl(
     override val firDiagnostic: KtPsiDiagnostic,
     override val token: KtLifetimeToken,