[FIR] Add CAST_NEVER_SUCCEEDS

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

@@ -3104,6 +3104,12 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.CAST_NEVER_SUCCEEDS) { firDiagnostic ->
+        CastNeverSucceedsImpl(
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.USELESS_CAST) { firDiagnostic ->
         UselessCastImpl(
             firDiagnostic as KtPsiDiagnostic,

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

@@ -2173,6 +2173,10 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         abstract val type: KtType
     }
 
+    abstract class CastNeverSucceeds : KtFirDiagnostic<KtBinaryExpressionWithTypeRHS>() {
+        override val diagnosticClass get() = CastNeverSucceeds::class
+    }
+
     abstract class UselessCast : KtFirDiagnostic<KtBinaryExpressionWithTypeRHS>() {
         override val diagnosticClass get() = UselessCast::class
     }

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

@@ -2618,6 +2618,13 @@ internal class CannotCheckForErasedImpl(
     override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
 }
 
+internal class CastNeverSucceedsImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.CastNeverSucceeds(), KtAbstractFirDiagnostic<KtBinaryExpressionWithTypeRHS> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
 internal class UselessCastImpl(
     override val firDiagnostic: KtPsiDiagnostic,
     override val token: ValidityToken,